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Brother RH-9820 Service Manual

Electronic eyelet button holer.
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Table of Contents
RH-9820
SERVICE MANUAL
Please read this manual before making any adjustments.
ELECTRONIC EYELET BUTTON HOLER

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Table of Contents

Troubleshooting

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   Summary of Contents for Brother RH-9820

  • Page 1 RH-9820 SERVICE MANUAL Please read this manual before making any adjustments. ELECTRONIC EYELET BUTTON HOLER...
  • Page 2 This service manual is intended for RH-9820; be sure to read the RH-9820 instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” and the whole of this manual to understand this product before you start maintenance. As a result of research and improvements regarding this product, some details of this manual may not be the same as those for the product you purchased.
  • Page 3: Safety Instructions

    ..……… This symbol ( ) indicates something that you must do. The picture inside the circle indicates the nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.) RH-9820...
  • Page 4 Furthermore, do not excessively bend the cords or secure them too firmly Contact your Brother dealer or a qualified electrician with staples. for any electrical work that may need to be done. If this is not observed, fire or electric shocks may The sewing machine weighs approximately 120 kg.
  • Page 5: Maintenance And Inspection

    In addition, do not subject the machine head to extra force while it is tilted back. Ask your Brother dealer or a qualified electrician to If this is not observed, the machine head may carry out any maintenance and inspection of the become unbalanced and fall over (together with the electrical system.
  • Page 6 The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. Do not touch the knife or press any...
  • Page 7 0332B 0331B Belt cover (Rear) 0333B 0486B 0334B 0485B RH-9820...
  • Page 8 6-19. Covers ................115 <-01 specifications only>...........35 6-20. Work clamp plate mechanism........117 4-15. Lower thread trimmer mechanism........36 6-21. Lower thread trimming mechanism.......121 6-22. Upper cover mechanism (upper thread tension release and upper thread take-up mechanisms and upper thread path)............127 RH-9820...
  • Page 9 8-5-2. Diagnosis flowchart..........207 7-24-3. Adjusting the position of the thread trimmer lever bracket ..............168 8-5-3. Remedy ..............210 7-25. Replacing and adjusting the movable knife and fixed 9. ERROR CODES......knife (for the lower thread and gimp) <-01 specifications>............169 10. TROUBLESHOOTING ..... RH-9820...
  • Page 10: Machine Specifications

    This is not covered by specification designations, but compatibility is possible by replacement of gauge parts. (Ask the place of purchase for details.) SPECIFICATIONS RH-9820-00 RH-9820-01 RH-9820-02 Men’s clothes, ladies’ clothes Jeans and work clothes Sewing speed...
  • Page 11: Function Settings

    Refer to “2-5. Error history checking method”. home position”. Input checking function Upper shaft stop position adjustment mode Refer to “2-6. Input checking method”. Refer to “7-36. Adjusting the upper shaft stop position”. 0676B - 0680B 0681B - 0685B RH-9820...
  • Page 12: List Of Advanced Functions

    This section contains a list of advanced functions and the key operations which are used to call the setting mode for the functions. 4550Q Production counter setting mode Refer to the Instruction manual. Data read/write mode Refer to “3-3. Data read/write mode”. 0708B 0709B RH-9820...
  • Page 13: Memory Switch Setting Method (advanced)

    The changed settings will be enabled after memory switch mode has been 0415B exited. Repeat steps 2 to 4 above to change other memory switch settings. [To exit memory switch mode] Normal sewing machine operation will then be possible. 0448B RH-9820...
  • Page 14: List Of Memory Switch Settings

    * This is displayed when the fly indexer is enabled. The material (fly) setting position is always at the left edge. After sewing is finished, the cloth feed bar returns to the left edge. The material (fly) setting position repeatedly alternates between the left and right edges. RH-9820...
  • Page 15 To raise the work clamp, carry out the following operations. (A) For hand start switch or 2-pedal foot switch operation: Press the work clamp switch. (B) For treadle operation: Depress the treadle backward. * When using the fly indexer, this function is disabled. RH-9820...
  • Page 16 Brake release speed when upper shaft stops 1 - 5 When a larger value is set, the brake is released more quickly. NOTE: Do not change the settings for Nos. 151 - 157 unless specifically instructed to by the manufacturer. RH-9820...
  • Page 17 When a larger value is set, the home position detection speed in the θ axis direction 0 - 2.0 becomes slower. Setting can be carried out in units of 0.1 ms. … If the version of the main control program (MN) is 1.0.00, the range will be “-1000 to 0”. RH-9820...
  • Page 18 Additional zigzag width when no cutting is set (mm) When sewing using no cutting, the value set here is added automatically to the zigzag 0 - 1.0 width. Setting can be carried out in units of 0.1 mm. RH-9820...
  • Page 19 Setting can be carried out in units of 5 ms. 5 - 50 * This is used when there is a problem with the lower thread trimming off sensor. * This is only enabled for -01 and -02 specifications. RH-9820...
  • Page 20 (A) When there is material underneath the sensor and an attempt is made to sew a straight buttonhole program (B) When there is no material underneath the sensor and an attempt is made to sew an eyelet buttonhole program RH-9820...
  • Page 21 X cutting position correction value (mm) * This is not overwritten by CF card data. The setting value is added as the X cutting position correction value for all programs. -0.50 - 0.50 Setting can be carried out in units of 0.05 mm. RH-9820...
  • Page 22 At this time, the sewing fold point will be 6 mm forward of the normal point. In addition, the maximum sewing length for straight buttonholes will be 6 mm smaller than normal. * This is enabled when sewing straight buttonholes. RH-9820...
  • Page 23: Error History Checking Method

    Up to 64 history events can be recorded, starting from the latest to be recorded. (No. 1 will be the latest error that has occurred.) 0413B [To exit error history checking mode] The sewing machine will change to home position detection standby. 0448B RH-9820...
  • Page 24: Input Checking Method

    Refer to the input check list for key and sensor responses. [To return to normal operation] Press the POWER switch at the OFF side to turn off the power, turn on the air, and then turn the power back on. RH-9820...
  • Page 25 Normal rotation: Up Reverse rotation: Down Turn the upper shaft pulley by * Normally within the range of 0 - 179. Upper shaft encoder signal hand. However, an unstable value may be displayed just before a single rotation is completed. RH-9820...
  • Page 26 External input signal 1 → OFF: Not connected ON: Connected External input signal 2 → OFF: Not connected Sensor input 1 This is a spare signal for special orders. (Applicable for main control program (MN) version 1.2.00 and later) Sensor input 2 RH-9820...
  • Page 27: Output Checking Method

    Press the start switch (2). The operation corresponding to the signal being checked will be carried out. 0982B [To return to normal operation] Press the POWER switch at the OFF side to turn off the power, and then turn the power back on. RH-9820...
  • Page 28 -02 specifications: The buzzer will sound for 0.7 second, and then the spreader will open, and then the θshaft will turn 180°and lower thread trimming will turn on. Buzzer The buzzer will sound while the start switch is being pressed. RH-9820...
  • Page 29 Indexer feed plate pressed. * Only with the fly indexer Valve output 1 Valve output 2 This is a spare signal for special orders. (Applicable for main control program (MN) version 1.2.00 and later) Valve output 3 Valve output 4 RH-9820...
  • Page 30: Software Version Checking Method

    When the F key is pressed, the IPL versions (B) will be displayed. 0721B MN … Main IPL 0983B 0710B 0452B PL … Panel IPL [To exit version checking mode] The sewing machine will change to home position detection standby. 0448B RH-9820...
  • Page 31: Reading/writing Data

    E*******.LDT ← Error log M*******.LDT ← Memory switches Error logs \BROTHER\ISM\ISMDC00\ISMLDT00\ * ****** is a name unique to the sewing machine. Memory switches \BROTHER\ISM\ISMDC00\ ISMMSW.SEW Parameter data As above ISMUPG.SEW Main control \BROTHER\ISM\ISMSYS\ ISM03MN.MOT program Panel control As above ISM03PL.MOT program RH-9820...
  • Page 32: Data Read/write Mode

    The main control program is read from the CF card and used to update the firmware version. The error log is written to the CF card. The panel control program is read from the CF card and used to update the firmware version. RH-9820...
  • Page 33: Reading Parameter Data From The Cf Card

    2. Press the ENTER key. All memory switch data from the sewing machine will be written to the CF card. Once writing is complete, the buzzer will sound. 3. Press the TEST key. Data read/write mode will end. 0728B RH-9820...
  • Page 34: Writing Error Log Data To The Cf Card

    Firmware updating will start. (It should take about three minutes.) Once writing is complete, a “COMPLETED” message and the power off symbol 0726B will be displayed. 4. Push the POWER switch to the OFF side to turn off the power, and then turn the power back on again. RH-9820...
  • Page 35: Mechanical Descriptions

    * <number> indicate the flow of operations that occur separately from each other. 4-1. Upper shaft and Needle bar mechanisms 1. Motor assembly 2. Lower shaft 3. Upper shaft 0658B 4. Upper shaft crank 5. Needle bar crank 6. Crank rod unit 7. Needle bar clamp 8. Spacer 9. Needle bar RH-9820...
  • Page 36: Zigzag And Thread Take-up Mechanisms

    5. Zigzag fork <5> Thread take-up roller 6. Zigzag connecting rod <6> Thread take-up 7. Zigzag crank 8. Zigzag driving lever 9. Zigzag lever 10. Zigzag horizon link 11. Needle bar block bracket 12. Needle bar block 13. Needle bar guide RH-9820...
  • Page 37: Needle Bar Rocking Mechanism

    2. Theta M pulley assembly 3. Timing belt D 4. Looper pulley assembly <4> Driving looper shaft assembly 5. Looper base assembly <5> Vertical shaft timing pulley U assembly <6> Timing belt U <7> Needle bar gear block unit RH-9820...
  • Page 38: Feed Mechanism

    0662B 1. Pulse motor Y 2. Driving gear 20 3. Idler gear 4. Timing pulley 5. Y Timing belt 6. Y driving shaft holder, Belt holder 7. Y shaft 8. Y bearing 9. Y guide shaft 10. Feed base RH-9820...
  • Page 39: Presser Foot Mechanism

    Because the air is bled from the clamp cylinder, the force from the spring (1) has the opposite effect from when lowered. 1. Spring 2. Clamp cylinder 16X10 3. Clamp cylinder rod 4. Clamp cylinder rod pin 5. Clamp driving lever 6. Clamp lever shaft 7. Clamp lever B 8. Clamp lever 9. Clamp arm 10. Work clamp 0783B RH-9820...
  • Page 40: Cloth Opening Mechanism

    2. Opening cylinder rod 3. Opening cylinder rod pin 4. Opening driving lever 5. Opening connecting rod 6. Slide block 7. Fulcrum lever plate 8. Rocker lever 9. Work clamp plate a. Bolt b. Extension spring c. Opening stopper plate RH-9820...
  • Page 41: Cutter Mechanism

    1. Lower shaft 2. Lower shaft cam 3. Lower shaft cam collar 4. Looper lever assembly 5. Looper driving plate 6. Looper driving shaft 7. Looper link clamp 8. Looper link unit 9. LS holder base assembly 10. Looper 0666B RH-9820...
  • Page 42: Spreader Mechanism

    6. Spreader link shaft 7. Spreader link base 8. Spreader cam link 9. Spreader driving cam 10. Spreader 0667B 4-10. Upper thread trimmer mechanism 1. Upper thread trimmer cylinder 2. Hammer 3. Thread trimmer lever bracket 4. Upper movable knife 0668B RH-9820...
  • Page 43: Upper Tension Release Mechanism

    4-12. Upper thread take-up mechanism 0670B 1. Cylinder assembly 10-30 2. Cylinder joint A 3. Collar B <3> Rubber cushion 4. Thread take-up lever driving plate <4> Impact support shaft 5. Thread take-up lever plate <5> Spring compression A RH-9820...
  • Page 44: Lower Thread Release And Lower Thread Take-up Mechanisms

    4. Tension release pin (tension release) 0671B 4-14. Gimp thread take-up mechanism <-01 specifications only> 1. Feed bar (Y direction operation) 0672B 2. Gimp thread take-up guide collar 3. Gimp thread take-up G-E plate 4. Gimp thread take-up guide plate RH-9820...
  • Page 45: Lower Thread Trimmer Mechanism

    1. Cylinder 16X30 assembly B 2. Thread trimmer lever J assembly 3. Thread trimmer lever arm B 4. Movable knife driving plate 5. Thread trimmer link A assembly <5> Thread trimmer link B assembly 6. Movable knife L <6> Movable knife R RH-9820...
  • Page 46 4. MECHANICAL DESCRIPTIONS RH-9820...
  • Page 47: Disassembly

    Disassembly should only be carried out by a Use only the proper replacement parts as qualified technician. specified by Brother. If any safety devices have been removed, be Turn off the power switch and disconnect the absolutely sure to re-install them to their power cord at the following times.
  • Page 48: Covers And Presser Foot Mechanism

    21. Work clamp plate R assembly 9. Eye guard 22. Work clamp plate L assembly 10. Screws [4 pcs] 11. Main plate (Tilt back the machine head.) 12. Socket bolts [2 pcs] 23. Screws [3 pcs] 13. Needle bar guard 24. Cam cover RH-9820...
  • Page 49: Upper Shaft Motor Unit Mechanism

    * Start with the machine head in its upright position. 1. Screws [2 pcs] 2. Belt guide 3. Socket bolts with washers [2 pcs] (Tilt back the machine head.) 4. Socket bolt with washer [1 pcs] 5. Upper shaft motor unit RH-9820...
  • Page 50: Feed Mechanism

    10. Flat screws [12 pcs] 11. Feed base cover R 12. Feed base cover L 13. Socket bolts with washers [2 pcs] 14. Set screws [4 pcs] (Loosen) 15. X feed guide shafts [2 pcs] (Pull forward to remove) 16. Feed base unit RH-9820...
  • Page 51: X Feed Unit

    (Return the machine head to its 20. Y shaft holder upright position.) 22. Y shaft (Pull backward to remove) (Tilt back the machine head.) 21. Socket bolt (Loosen) (Tilt back the machine head.) 23. Socket bolts [3 pcs] 24. Y feed assembly RH-9820...
  • Page 52: Lower Thread Tension Mechanism

    5. DISASSEMBLY 5-4. Lower thread tension mechanism 1084B * Carry out the following with the machine head tilted back. 1. Socket bolts [3 pcs] 2. Lower thread guide adjust assembly RH-9820...
  • Page 53: Spreader Mechanism

    * Carry out the following with the machine head tilted back. 1. Screw 2. Tube support B 3. Screw (Loosen) 4. Set screws [2 pcs] (Loosen) 5. Spreader lever shaft 6. Screws [2 pcs] 7. Spreader lever B assembly 8. Spreader lever shaft 9. Spreader lever A assembly RH-9820...
  • Page 54: Looper Mechanism

    * Carry out the following with the machine head tilted back. 1. Screw (Loosen) 2. Socket bolt (Loosen) 3. Looper driving shaft 4. Looper driving shaft bracket 5. Set screws [2 pcs] (Loosen) 6. Looper lever shaft 7. Looper lever assembly RH-9820...
  • Page 55: Needle Bar Rocking Mechanism

    [4 pcs] 11. Set screws [2 pcs] (Loosen) 6. Pulse motor assembly R 7. Timing belt D (Tilt back the machine head once more.) 12. Driving looper shaft assembly 13. Vertical shaft timing pulley U assembly 14. Timing belt U RH-9820...
  • Page 56: Looper Base Mechanism

    “5-8. Looper base mechanism”. 1078B * Carry out the following with the machine head tilted back. 1. Socket bolts [2 pcs] 2. Partition 3. Screw (Loosen) 4. Looper pulley (screw type) 5. Looper base unit RH-9820...
  • Page 57: Needle Bar Mechanism

    15. Needle bar clamp [2 pcs] 16. Washers [2 pcs] 17. Rubber cap 18. Set screws [3 pcs] (Loosen) 19. Needle bar crank, Crank rod unit 20. Slide block 21. Socket bolts [5 pcs] 1088B 22. Slide block guide D RH-9820...
  • Page 58: Lubrication

    5. DISASSEMBLY 5-10. Lubrication 1089B RH-9820...
  • Page 59 (From this point on, disassemble after the disassembly in “5-13. 18. Screws [3 pcs] 19. Cord holders #10 [3 pcs] Cutter mechanism” has been 20. Lower shaft cover done.) assembly 37. Socket bolt 21. Felt 38. Tube guide 39. Felt assembly RH-9820...
  • Page 60: Zigzag And Thread Take-up Mechanisms

    11. Needle bar block collar <Thread take-up mechanism> 12. Set screw (Loosen) 13. Thread take-up L support shaft (Pull out) 14. Thread take-up lever unit (Remove the roller from the grooved cam and lift upward.) RH-9820...
  • Page 61: Upper Shaft Mechanism

    (Pull out from the back.) 8. Pinion 9. Screws [3 pcs] 10. Plain washers [3 pcs] NOTE: The bearing unit (16) and the bearing inner rings <A> and <B> are joined with adhesive, so avoid disassembling them if possible. RH-9820...
  • Page 62: Cutter Mechanism

    20. Cutter driving shaft unit 10. Set screws [2 pcs] (Pull down to remove) (Loosen) 21. Socket bolt 11. Set screws [2 pcs] 22. Knife bracket unit (Loosen) 23. Eccentric pin 12. Cutter arm shaft (Pull out) 13. Cutter arm assembly RH-9820...
  • Page 63: Assembly

    Assembly should only be carried out by a Use only the proper replacement parts as qualified technician. specified by Brother. If any safety devices have been removed, be Turn off the power switch and disconnect the absolutely sure to re-install them to their power cord at the following times.
  • Page 64: Cutter Mechanism

    “6-1. Cutter mechanism”. * Refer to the detailed descriptions on the next page for details on A to D in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by...
  • Page 65 Tighten the Set screw (19) Insert the cutter arm pin illustration. so that the cutter sensor pin (29) so that the “-” side (18) protrudes by about 1.0 protrudes from the end of ±0.5 mm. the lever by about 1.0±0.3 0788B 0787B 0789B RH-9820...
  • Page 66: Needle Bar Mechanism (1)

    1. Bearing 2. Bearing 3. Pulley flange 4. Screws [4 pcs] 5. Needle bar gear block 0790B 6. Needle bar gear nut 7. Screw 8. Gear nut cover RH-9820...
  • Page 67 (7). NOTE: If pressure is not applied, it will not be possible to adjust the turning center for the needle bar and looper base, and this will cause problems with sewing such as skipped stitches. 0791B RH-9820...
  • Page 68: Zigzag Mechanism

    Align the end play. of the shaft with the edge of the arm. Adjust so that there is no play. Refer to “7-3. Check the Adjusting the direction of installation. zigzag base line position” when fully tightening. 0849B RH-9820...
  • Page 69 After this, install the socket bolt (17) so that it faces as shown in the illustration. Insert into the groove and then tie. Groove Groove 0851B Install the wick (24) as shown in the illustration. Next, push the six felts (25) into the end of the shaft so that they do not protrude. 0850B RH-9820...
  • Page 70: Upper Shaft Mechanism

    * For parts with screw stops, install so that the screw at the front in the turning direction is at the screw stop position. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by...
  • Page 71 (10) against the upper shaft crank (4) with a force of 29.4 N, and then tighten the two set screws (13). 0823B 3) While pushing the end of the bearing collar (15) in the direction of the arrow with a force of 29.4 N, tighten the two set screws (17). 0824B RH-9820...
  • Page 72 If the amount of backlash is too small, the rotation torque will increase and this will cause the gear (25) to become worn. Furthermore, if the amount of backlash is too large, the operating noise will increase, so be sure to adjust the backlash correctly. RH-9820...
  • Page 73: Thread Take-up Mechanism

    Insert the roller (4) into the groove in the thread take-up cam, and then insert the thread take-up L support shaft (8). * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by...
  • Page 74: Needle Bar Mechanism (2)

    * Refer to the detailed descriptions on pages 66 to 68 for details on A to F in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-30.
  • Page 75 Align the white painted marks on the needle is correct when assembling. bar block (c), needle bar guide washer (d) and needle bar gear (e) before installing. White Thread path painted hole is at the marks back. Viewed from the front 0835B 0834B RH-9820...
  • Page 76 2) While pushing the slide block guide F (36) gently from the face plate side toward the arm installation surface, tighten the fourth socket bolts (37) (g) from the side of the arm. 3) Fully tighten the three socket bolts (37). Face plate side Right side 0837B RH-9820...
  • Page 77 (12) on the opposite side. * After assembling, check that the upper shaft crank (h) turns easily. If the slide block (13) is pushed too firmly, the upper shaft torque will become stiffer. 0838B RH-9820...
  • Page 78: Y Feed Mechanism

    * Refer to the detailed descriptions on pages 70 to 72 for details on A to F in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by NOTE: After carrying out this procedure, be sure to adjust the Y home position while referring to “7-35.
  • Page 79 Assemble as shown in the Place the pulse motor Y illustration. illustration. assembly (30) against the idler gear 40 (11) so that the amount of backlash is 0.03 mm or less, and then tighten the four socket bolts (32). 0843B 0842B 0841B RH-9820...
  • Page 80 Measurement position * The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 10 mm and a span length of 120 mm. 0844B 0845B RH-9820...
  • Page 81 <Y shaft and Y driving shaft holder installation positions> Align the end (C) of the Y driving shaft holder (24) and the reference line (D) on the Y shaft (35), and then tighten the socket bolt (38). Front 0848B 0847B RH-9820...
  • Page 82: Looper Base Mechanism

    * Refer to the detailed descriptions on pages 75 to 78 for details on A to F in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by 7-8.
  • Page 83 60. Throat plate 87. Plain washer 61. Screw (Temporarily tighten) 88. Screw 89. Gimp thread guide C <Gimp thread guide C-J for -02 specifications> 90. Screw 91. Ball bearings [2 pcs] 92. Looper base 93. Looper pulley assembly 94. Screw RH-9820...
  • Page 84 * Wind so that the knot is directly below the hole (c) and so that it does not protrude to the outside. * Wind the wick (8) and the wick (9) so that they are positioned as shown in the illustration. (Viewed from the left) (Viewed from the front) 1185B RH-9820...
  • Page 85 2) Raise the end of the hook (e) of the L thread take-up spring support (56) so that it touches the support shaft base (43), and then tighten the screw with washer (57) at that position. * This will prevent the wick from pulling away. 1097B 1096B RH-9820...
  • Page 86 Push the five wicks (g) into the hole (h) as oil tube (79) as shown in the illustration, and shown in the illustration, and then install the then pass them through the hole (f). cord presser (80) and secure it by tightening the screw (81). 1188B 1187B RH-9820...
  • Page 87 2) Secure the looper pulley assembly (93) so that it will not turn, and then push the back of the looper base (92) at a point 20 mm to the left of center with a force of 70 N. 3) Tighten the screw (94). 1101B RH-9820...
  • Page 88: Needle Bar Rocking Mechanism

    6. ASSEMBLY 6-9. Needle bar rocking mechanism * Refer to the detailed descriptions on pages 80 to 84 for details on A to G in the illustration. 0922B RH-9820...
  • Page 89 M pulley assembly (18) with the screw stop on theta M pulley assembly (18). the driving looper shaft assembly (9). In addition, set the clearance between the theta M pulley assembly (18) and pulse motor assembly R (20) to 2 mm. 0925B 0926B RH-9820...
  • Page 90 NOTE: If you do not have a belt tension gauge, adjust that amount deflection approximately 3 mm when a pressure of 5 N is applied to the middle of the span (the measurement position shown in the illustration). 0927B RH-9820...
  • Page 91 If you do not have a belt tension gauge, use a push-pull gauge to push tension pulley (28) in the direction of the arrow with a force of 65 1197B N, and then tighten the two socket bolts with 0928B washers (31). 0929B RH-9820...
  • Page 92 5) Turn the needle bar gear block (a) in the direction of the arrow until the positioning gauge (f) touches the end (h) of the cutter driving bushing. * The underside of the positioning gauge (f) should touch the end (h). 0930B 0931B 1195B 1196B RH-9820...
  • Page 93 6. ASSEMBLY 6) Push the vertical shaft timing pulley U assembly (7) up gently until it touches the bearing (1), and then tighten the socket bolt (6). 0932B RH-9820...
  • Page 94: Lower Shaft Mechanism

    6. ASSEMBLY 6-10. Lower shaft mechanism * Refer to the detailed descriptions on pages 86 to 89 for details on A to C in the illustration. Press-fit into the arm after assembling. Press-fit into the arm after assembling. 0933B RH-9820...
  • Page 95 2) While pushing the lower shaft (9). in the direction of arrow (A) with a force of 29.4 N, tighten the two set screws (11) of the bearing collar (4). 3) Push the back of lower shaft tension pulley B (7) gently in the direction of arrow (B) and tighten the two set screws (12). 0934B RH-9820...
  • Page 96 If you do not have a belt tension gauge, adjust so that the amount of deflection is approximately 2 mm when a pressure of 5N is applied to the middle of the span (the measurement position shown in 0935B the illustration). 0936B 0937B RH-9820...
  • Page 97 * The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 15 mm and a span length of 198 mm. 0941B 0938B 0939B 0940B 1198B RH-9820...
  • Page 98 (28) with the hole (H) in the bed. 3) Push the lower shaft cam (28) against the end of the bearing collar (2), and then provisionally tighten the two set screws (29). Should be no clearance. 0941B 0942B 0943B RH-9820...
  • Page 99: Looper Mechanism

    6-11. Looper mechanism * Refer to the detailed descriptions on the next page for details on A in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-4.
  • Page 100 2 mm from the knots. ・ Tie once. ・ Pass the knot through (Viewed from underneath) the tube. (Viewed from the left) (Viewed from the front) ・ Tie once. ・ Pass the knot through the tube. (Clearance) 1103B 1104B RH-9820...
  • Page 101: Spreader Mechanism

    6-12. Spreader mechanism * Refer to the detailed descriptions on the next page for details on A and B in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by 1.
  • Page 102 *1: Cut the ends at a length 4 mm from the knots. 1027B Align the top of the spreader link base (b) with the reference line (a) on the spreader link shaft (15), and then tighten the screw (23). 1028B RH-9820...
  • Page 103: Upper Thread Trimmer Mechanism

    * Install in the positions shown in the illustration. Clearance: (When at maximum extension) 1. Cylinder assembly 2. Socket bolts [2 pcs] 3. Hammer 4. Hammer guide plate 5. Socket bolts [2 pcs] 6. Cylinder setting plate 7. Socket bolts [2 pcs] 0985B RH-9820...
  • Page 104: Threading Mechanism

    6. ASSEMBLY 6-14. Threading mechanism * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Tighten the shoulder screw (11) followed by the nut (12) so that the gimp thread take-up driving plate (9) and the gimp thread tale-up plate (10) move smoothly with no play.
  • Page 105 11. Shoulder screw 30. Socket bolts [2 pcs] 12. Nut 13. Springs [2 pcs] 31. Thread guide pipe 14. Gimp thread guide 32. Thread guide pipe support 15. Screw 33. Screw 16. Gimp thread take-up G-holder 17. Socket bolts [2 pcs] RH-9820...
  • Page 106: Feed Base Mechanism

    6-15. Feed base mechanism Refer to the detailed descriptions on pages 102 and 103 for details on A to K in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by 6-15-1.
  • Page 107 137. Feed base cover U 49. Cylinder 98. Spring 138. Truss screws [2 pcs] *1:Refer to “7-18. Adjusting the work clamp lift amounts”. *2:Refer to “7-21. Adjusting the cloth opening amounts”. *3:Refer to “7-20. Adjusting the positions of the work clamp plates”. RH-9820...
  • Page 108 Routing the air tubes and harnesses <-00 specifications> The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and harness to make sure that they are routed correctly as shown in the illustration. 0987B RH-9820...
  • Page 109 Routing the air tubes and harnesses <-01 specifications> The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and harness to make sure that they are routed correctly as shown in the illustration. 0988B RH-9820...
  • Page 110 Routing the air tubes and harnesses <-02 specifications> The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and harness to make sure that they are routed correctly as shown in the illustration. 0989B RH-9820...
  • Page 111 Assemble as shown in the illustration. Assemble as shown in the illustration. (最縮時) (When at maximum retraction) 0994B 0995B Assemble as shown in the illustration. Assemble as shown in the illustration. (When at maximum retraction) (When at maximum retraction) 0996B 0997B RH-9820...
  • Page 112 <For -01 and -02 specifications only> Install so that the centers of the pin holes (e) Install at the distance shown in the illustration. and (f) are at the distance shown in the illustration. (When at maximum retraction) (When at maximum retraction) 1001B 1002B RH-9820...
  • Page 113: X Feed Shaft Holder

    * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by * Apply the grease specified by Brother (Shin Lube EJ manufactured by Nippon Steel Chemical Corporation) in the places indicated by 1003B 1.
  • Page 114 (9) so that the gear (6) with the shorter distance between the thread hole and the edge is on the right. * While pushing the two gears (6) in the direction of the arrow at this time, tighten the four socket bolts (7). (Viewed from the side) 1005B RH-9820...
  • Page 115 Align the edges. 5) Install the Y feed guide shaft (16) on the right side also by following steps 2 to 4 above. 1006B <For -01 specifications only> Install the Cylinder screw (20) in the position shown in the illustration. 1007B RH-9820...
  • Page 116: X Feed Mechanism

    * Refer to the detailed descriptions on the next page for details on A to C in the illustration. * Apply the grease specified by Brother (Shin Lube EJ manufactured by Nippon Steel Chemical Corporation) in the places indicated by...
  • Page 117 5 in the adjustment procedure for the idler gear (6) can be omitted. (If carrying out any disassembly or assembly which changes the positions of the X racks or if re-adjusting the backlash, carry out the full procedure.) 0966B 0967B 0968B RH-9820...
  • Page 118: Lower Thread Tension Mechanism

    6-17. Lower thread tension mechanism * Refer to the detailed descriptions on the next page for details on A in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-32.
  • Page 119 Insert the longer end of the spring (4) into the pin (1), and insert the shorter end into the notch in the spring pin (1), and insert the shorter end into the lower thread take-up guide lever (3). notch in the lower thread release plate (3). 0970B RH-9820...
  • Page 120: Upper Shaft Motor Mechanism

    “7-36. Adjusting the upper shaft stop position”. 0852B 1. Motor assembly 2. Socket bolts [5 pcs] 3. Timing pulley 4. Set screws [2 pcs] 5. Motor holder 6. Socket bolts with washers [3 pcs] 7. Motor cover 8. Belt guide 9. Screws [2 pcs] RH-9820...
  • Page 121 * The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 15 mm and a span length of 92 mm. 0855B RH-9820...
  • Page 122 (A) in the motor holder (d). 5) Provisionally screw in the socket bolt with washer (f) until it is almost fully tightened. 6) Return the machine head to its original position. (Continued on next page) 0975B RH-9820...
  • Page 123 NOTE: If you do not have a belt tension gauge, adjust that amount deflection approximately 1 mm when a pressure of 5 N is applied to the middle of the span (the measurement position shown in the illustration). 0856B RH-9820...
  • Page 124: Covers

    6. ASSEMBLY 6-19. Covers 1064B RH-9820...
  • Page 125 14. Screws [5 pcs] 15. Belt cover 16. Screws with washers [4 pcs] 17. Top cover assembly 18. Screws [9 pcs] 19. Needle bar guard 20. Socket bolts [2 pcs] 21. Switch cover 22. Screws with washers [3 pcs] RH-9820...
  • Page 126: Work Clamp Plate Mechanism

    * Refer to the detailed descriptions on pages 119 and 120 for details on A to D in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-26-4.
  • Page 127 21. Plate spring 46. Cloth work clamp A 22. Screw 47. Sub auxiliary clamp wrist 23. Thread trimmer B 48. Socket bolt (Temporarily tighten) 24. Thread trimmer A 49. Auxiliary clamp arm 25. Screw 50. Retaining rings C 51. Spring RH-9820...
  • Page 128 2) Next, adjust cloth work clamp L (11) so that its side is flush with the side of needle plate L (4). 3) Once adjustment is complete, tighten the socket bolt (16). (Viewed from directly to the left) 1010B RH-9820...
  • Page 129 2) Next, adjust the cloth work clamp R (36) so that its side is flush with the side of needle plate R (29). 3) Once adjustment is complete, tighten the socket bolt (41). (Viewed from directly to the right) 1012B RH-9820...
  • Page 130: Lower Thread Trimming Mechanism

    * Refer to the detailed descriptions on pages 123 and 124 for details on A to E in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-25.
  • Page 131 43. Thread nipper M (Temporarily tighten) 19. Spring 44. Screws [2 pcs] (Temporarily tighten) 20. Pin 45. Work clamp plate U 21. Thread handler 46. Screws [2 pcs] 22. Flat screw (Temporarily tighten) 23. Screw (Temporarily tighten) 24. Movable knife RH-9820...
  • Page 132 Should be flush (Bottom) 1014B Install the pin (14) so that it projects by the Install the spring hook (15) so that it faces in distance shown in the illustration. the direction shown in the illustration. 1015B 1016B RH-9820...
  • Page 133 6. ASSEMBLY Insert the end of the opener spring (29) into Install all parts so that the edges are aligned as the notch (c) of the thread nipper opener (27). shown in the illustration. Align the edges. 1017B 1018B RH-9820...
  • Page 134: Specifications

    <-02 specifications> * Refer to the detailed descriptions on the next page for details on F and G in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by Refer to “7-26.
  • Page 135 (a). * Install the spring hook (6) so that the hole (b) faces in the direction shown in the illustration. (Bottom) 1020B Install the pin (23) so that it projects by the distance shown in the illustration. 1021B RH-9820...
  • Page 136 * Refer to the detailed descriptions on the next page for details on A to C in the illustration. * Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning Corporation) in the places indicated by 0857B Refer to “7-31.
  • Page 137 (When cylinder is at maximum retraction) 0858B Assemble as shown in the illustration. Install the thread spool pin (54) so that the holes face in the direction shown in the illustration. Holes (When cylinder is at 0860B 0859B maximum retraction) RH-9820...
  • Page 138: Routing The Harnesses

    Stop switch <1> <2> <3> <4> <5> <8> Cutter sensor <6> <7> <8> Upper tension release solenoid <8> Main valve harness <8> <9> <12> <13> <14> Relay harness <9> <12> <13> <14> Upper thread solenoid harness <9> <12> <13> <14> RH-9820...
  • Page 139 1107B Routing order Part name Gimp thread solenoid <12> <13> <14> Y sensor <10> <11> <13> <14> Lower tension release solenoid <12> <13> <14> Safety switch <11> <13> <14> X motor <13> <14> Y motor θmotor Upper shaft motor RH-9820...
  • Page 140: Routing The Air Tubes

    4) Pass the air tubes (No. 13 and No. 14) out through the bottom of the bed into the side of the arm, and then pass them out through the side of the arm. (Left side of arm) 1066B 1067B 1068B RH-9820...
  • Page 141 2) Pass the air tube (f) for cutting scraps through the hole and out from the rear of the bed. 3) Secure the air tube (No. 1) for the valve unit (e) and the air tube (f) for cutting scraps with the tube presser (h). 1071B 1072B RH-9820...
  • Page 142: Solenoid Valve Tubes And Functions

    * For cloth work clamp For lower thread trimming * : Auxiliary clamp arm is for -02 specifications only. : The solenoid valve for label No. 5 is not present in specifications without a lower thread trimmer. 1074B RH-9820...
  • Page 143 6. ASSEMBLY Securing the air tubes Secure the air tubes and the harnesses with the cord holders (k) (2 places). Tubes and harnesses from the feed base 1075B RH-9820...
  • Page 144: Lubrication And Greasing And Routing The Oil Tubes

    6-25. Lubrication and greasing and routing the oil tubes * <1> to <8> should be done before carrying out the assembly procedure in “6-1. Cutter mechanism”. * Refer to the detailed descriptions on pages 136 to 140 for details on A to J in the illustration. 1029B RH-9820...
  • Page 145 Install the oil tube (7) and the oil tube (13) to the tube support (16) as shown in the illustration. Align the edges 1030B Secure the oil tube (13) with the cord holder (NK-3N) (18) as shown in the illustration. 1031B RH-9820...
  • Page 146 * A list of the four wicks (d) is as follows. ・Wick (1) ・Wick (10) ・Felt presser assembly (7) in “6-6. Needle bar mechanism (2)” ・Wick (11) in “6-3. Zigzag mechanism” 2) Push in the felt (31). 1034B RH-9820...
  • Page 147 3) Connect the oil tube (43) to the sub-tank assembly (40). * Make sure that the wick <5> does not cover the hole. Maintain a clearance 1036B Secure the oil tube (g) coming from the sub tank assembly (40) with the four cord holders (44). 1037B RH-9820...
  • Page 148 ・ Wick (6) and wick (8) (j) of “6-11. Looper mechanism” ・ Wick (4) (k) of “6-12. Spreader mechanism” 4) Push the felt (49) into the bed hole (h). 5) Secure the oil tubes with the tube support B (50). 1038B 1039B 1040B RH-9820...
  • Page 149 3) Push the felt (52) in through the hole (o) in the bed so that it is touching the wick. 4) Secure the oil tube (l) with cord holder #5 (53). 1041B 1042B RH-9820...
  • Page 150: Adjustments

    “0” before carrying out inspection, adjustment and repair Ask your Brother dealer or a qualified electrician to of any parts which use the pneumatic equipment. carry out any maintenance and inspection of the electrical system.
  • Page 151: Adjusting The Zigzag Width (stitch Width)

    “7-7. Adjusting the clearance between the loopers and needle”, “7-8. Adjusting the needle guard”, “7-9. Adjusting the spreader installation positions”, “7-10. Adjusting the spreader timing”. • The index marks are a guide to the zigzag width. Lower the needle onto a piece of paper or similar to accurately measure the zigzag width. RH-9820...
  • Page 152: Adjusting The Zigzag Base Line Position

    0.5 mm in the paper (1) when the needle comes to the needle down position. Hole width approx. 0.5 mm 0564B RH-9820...
  • Page 153 8. Turn the upper shaft pulley (6) to lower the needle so that it makes a small hole in the paper (5). If the inner needle drop positions (A) are not aligned, carry out the adjustments in steps 9 - 12 on the next page. (Continued on next page) 0475B RH-9820...
  • Page 154 12. Tighten the socket bolt (9). 13. Repeat steps 4 - 12 until the inner zigzag base line is aligned correctly. 14. Once adjustment is complete, return the cap (11), cover (10) and face plate (8) to their original positions. 0434B RH-9820...
  • Page 155: Adjusting The Needle And Looper Timing

    9. Move the LS holder base (10) to the left or right to adjust so that length <a> and length <a'> are the same. 10. Once adjustment is complete, securely tighten the screw (9). (Viewed from the front) 0487B 0488B RH-9820...
  • Page 156: Adjusting The Looper Stroke

    7. With the upper shaft pulley (1) stopped, turn the lower shaft cam (4) to adjust so that the tip of the eye looper (6) is aligned with the needle center (7). 8. Once adjustment is complete, push the lower shaft cam (4) against the surface of the bearing collar (8), and then securely tighten the two set screws (5). RH-9820...
  • Page 157: Adjusting The Height Of The Needle Bar

    5. In order to make the needle bar turn smoothly, adjust so that there is no play in the needle bar, but so that there is enough of a gap between the needle bar clamps (3) and the needle bar feed rock link (6) for oil to get into. 6. Once adjustment is complete, securely tighten the two screws (4) and install the face plate. RH-9820...
  • Page 158: Adjusting The Clearance Between The Loopers And Needle

    If it crosses the needle more than necessary, it will place a load on the needle and this may cause the needle to break. Alternatively, if it does not cross the needle at all, the tips of the loopers will interfere with the needle and skipped stitches may occur. RH-9820...
  • Page 159: Adjusting The Spreader Installation Positions

    4. Once adjustment is complete, tighten the set screw (8). NOTE: Spreader L (1) and spreader R (6) should not protrude above the eye looper (2) or looper R (7) respectively. If they do, skipped stitches or needle breakages may occur. RH-9820...
  • Page 160: Adjusting The Spreader Timing

    3. Turn the eccentric pin (7) to adjust. 4. After adjusting, tighten the set screw (6) and the two screws (5) in that order. NOTE: Make sure that spreader R (1) and spreader L (2) do not obstruct the needle after adjustment. RH-9820...
  • Page 161: Adjusting The Height Of The Throat Plate

    Press down gently on the throat plate (8) from above while adjusting it. If the adjustment is carried out while the throat plate (8) is lifted up, the correct adjustment result will not be obtained. 7. Once adjustment is complete, tighten the screws that were loosened and return all other parts to their original positions. RH-9820...
  • Page 162: Changing The Cutting Length (replacing The Hammer)

    If the knife that was being used previously is replaced by a knife with a different number, replace the hammer also. If the same hammer is used for two or more different types of knife, different knife incisions will be formed on the hammer, and this may cause problems with the accurate cutting of the material or may damage the knife. RH-9820...
  • Page 163: Adjusting The Cutting Surface Of The Hammer

    1. Grip the hammer in a vise. 2. Use the flat file to file the cutting surface of the hammer smoothly until a single knife incision can still be seen faintly. 0505B Once filing is complete, install the hammer. RH-9820...
  • Page 164: Adjusting The Contact Between The Knife And The Hammer

    (4) causes it to return correctly. If the hammer bracket (3) does not return correctly, it may obstruct the work clamps and damage may result. 4. Once adjustment is complete, tighten the two nuts (1). 0470B RH-9820...
  • Page 165: Making The Cutter Driving Shaft And Driving Shaft Presser Move Together

    * Tighten the set screw (10) securely. If the set screw (10) is loose and protrudes from the surface of the cutter driving shaft (2), damage may result. 6. Install the face plate (8) and the upper cover (7), and then open the cock (5) to resume the supply of air. RH-9820...
  • Page 166: Replacing The Knife And Adjusting Its Position

    Replace the knife and hammer as a set. If the same hammer is used for two or more different types of knife, different knife incisions will be formed on the hammer, and this may cause problems with the accurate cutting of the material or may damage the knife. RH-9820...
  • Page 167: Making Fine Adjustments To The Knife Position

    7. If they do not overlap uniformly, turn off the power and carry out the adjustment in steps 8 - 13. Once adjustment is complete, repeat steps 4 - 6 to check, and if further adjustment is needed, repeat step (Continued on next page) 0555B RH-9820...
  • Page 168 12. Turn the eccentric pin (10) to adjust. Fine adjustments can also be made by turning centering on the pivot (11). 13. Once adjustment is complete, tighten the socket bolts (9), (8) and (7) in that order. (Viewed from directly above the knife base) RH-9820...
  • Page 169: Adjusting The Cutting Pressure

    If the material cannot be cut cleanly, do not increase the cutting pressure to too high a pressure. Check the timing between the knife and the hammer. (Refer to “7-13-2. Adjusting the contact between the knife and the hammer”.) 0469B RH-9820...
  • Page 170: Adjusting The Work Clamp Lift Amounts

    Check that work clamp R (8) is pressed securely against the block or the gauge (10). 7. Install feed base cover R (7) and feed base cover U (4). Adjust the lift amount for the left-side work clamp in the same way. RH-9820...
  • Page 171: Adjusting The Work Clamp Positions

    1. Loosen the two set screws (5), and then adjust the sideways position of the clamp lever (6). 2. Once adjustment is complete, tighten the two set screws (5). Adjust the position for the left-side work clamp in the same way. RH-9820...
  • Page 172: Adjusting The Positions Of The Work Clamp Plates

    6. Once adjustment is complete, tighten the nut (10). 7. Press the RESET key (12), and then press the STOP switch (13) to end test mode. Adjust the gap between the throat plate (1) and needle plate L in the same way. RH-9820...
  • Page 173: Adjusting The Cloth Opening Amounts

    6. Calculate the cloth opening amounts for both sides. 7. Carry out adjustment if the two cloth opening amounts are not the same, or if the cloth opening amount at either side is lower than 0.8 mm. (Refer to following page.) RH-9820...
  • Page 174: Adjusting The Upper Thread Feeding Amount

    More thread Less thread 0477B 1. Loosen the screw (2). 2. Move the thread take-up lever (1) up or down to adjust the upper thread feeding amount. 3. Once adjustment is complete, securely tighten the screw (2). RH-9820...
  • Page 175: Replacing And Adjusting The Upper Movable Knife

    7-24-1. Replacing the upper movable knife 1. Remove the screw (1), and then remove the upper movable knife (2). 2. Install the new upper movable knife with the screw (1). <-00 and –01 specifications> <-02 specifications> <-00 and -01 specifications> <-02 specifications> 0401B RH-9820...
  • Page 176: Adjusting The Upper Movable Knife

    When the upper movable knife (1) has returned to its original position, the upper thread is trimmed at position A. <-02 specifications> When the upper movable knife (1) starts moving, the upper thread is trimmed at position B. <-00 and -01 specifications> <-02 specifications> 0565B RH-9820...
  • Page 177: Adjusting The Position Of The Thread Trimmer Lever Bracket

    3. Turn the looper base (3) and check that the thread trimmer lever bracket (4) moves underneath the thread trimmer hammer (5) without obstructing any other parts. 4. Once adjustment is complete, securely tighten the nut (1). (Viewed from the front) 0546B RH-9820...
  • Page 178: Replacing The Movable Knife And Fixed Knife

    (5). After replacing the knives, carry out the adjustments from “7-25-2. Adjusting the cutting pressure” to “7-25-5. Adjusting the thread handler”. Once adjustment is complete, install work clamp plate U (2). 0520B RH-9820...
  • Page 179: Adjusting The Cutting Pressure

    (8) and the thread trimmer arm (7) move smoothly with no play. • If the meshing amount is too small, problems with the lower thread nipper will occur and the thread will be pulled out at the sewing start. 0522B RH-9820...
  • Page 180: Adjusting The Thread Nipper Assembly And Opener

    If the thread nipper assembly (3) is installed at an angle, thread nipper D (1) may touch the throat plate and fail to open, and problems with the lower thread nipper will occur and the thread will be pulled out at the sewing start. RH-9820...
  • Page 181 (c) Thread nipper D (1) should not open when the thread trimmer arm (6) returns after thread trimming, so that the thread nipper opener (4) returns without going over the opener pin (10). 3. Once adjustment is complete, securely tighten the two screws (5). 0554B RH-9820...
  • Page 182: Adjusting The Thread Handler

    5. Once adjustment is complete, securely tighten the pan screw (6) and the screw (7). NOTE: If the height of the throat plate (4) has been changed, the triangular shape (A) defined by the final stitch, lower thread and gimp will change, and so you should adjust the thread handler (1). RH-9820...
  • Page 183: Replacing The Movable Knife And Fixed Knife

    If the shoulder screw (2) is tightened as far as it will go, the movable knives will no longer operate. Gradually loosen the shoulder screw (2) to a point where the movable knives turn smoothly. 3. Once adjustment is complete, securely tighten the nut (1). 0527B RH-9820...
  • Page 184: Adjusting The Movable Knife Installation Position

    4. Turn thread trimmer lever arm B (7) until the thread trimmer link lever J assembly (5) touches against the screw (6), and then tighten the screw (1). 5. Once adjustment is complete, install work clamp plate U. NOTE: Check that the movable knife driving plate (4) and thread trimmer lever arm B (7) turn smoothly with no play. RH-9820...
  • Page 185: Adjusting The Position Of The Sub Clamp

    2. Adjust the installation position of the sub clamp wrist (4) with respect to the article being sewn so that the button clamp (2) moves above the needle plate (3). 3. Once adjustment is complete, securely tighten the socket bolt (1). 0530B RH-9820...
  • Page 186: Differences From Older Models

    7. ADJUSTMENTS 7-26-5. Differences from older models RH-9820 RH-981A 1189B 1190B -00,-01 -00,-01 -02: L2634, L3442 -02: L5, L6, L7 -02:L1422,L2230 -02: L1, L2, L3, L4 L1826 (Position when S (Position when S hammer is being used) hammer is being used)
  • Page 187 7. ADJUSTMENTS RH-9820...
  • Page 188 [A] to adjust so that 2 - 4 mm of the gimp protrudes from the seam at the sewing start. 3. Once adjustment is complete, securely tighten the screw (3). The gimp trailing length at the sewing end is uniform because of thread trimming. RH-9820...
  • Page 189 If adjustment is required, remove the lower thread presser base (8), loosen the nut (9), and then turn the screw (10) to adjust. 4. Once adjustment is complete, tighten the nuts (5) and (9) that were loosened, and install the lower thread presser base (8). RH-9820...
  • Page 190: Adjustment Of The Phase For The Take-up Roller Cam

    9. Pull out the pins (6) and (9) and then tighten the other set screw (3). 10. Once adjustment is complete, install the rubber cap (8), rubber cap (5), upper shaft pulley (7), face plate (4) and upper cover (1) in that order. RH-9820...
  • Page 191: Adjusting The Needle Bar And Looper Base Turning Center

    If a sheet of paper is placed under the needle and the needle drop position is adjusted so that the needle makes a single hole in the paper, the distance <a> between the needle and the tip of eye looper (1) will still not be uniform. RH-9820...
  • Page 192: Adjusting The Upper Thread Loosening Amount

    2. With the upper thread tension release solenoid (1) installed to the upper cover (6), check that the opening amount for the tension discs (7) is 0.5 - 1 mm when the plunger (2) is pushed all the way in. Section (A) should be sealed at this time. RH-9820...
  • Page 193: Adjusting The Lower Thread Loosening Amount

    (2) until the tension release pin (4) is sitting on stepped part [A]. 3. Turn the tension stud D (6) to adjust the height so that the opening amount for the tension discs (5) is 1 ± 0.3 mm at this time. 4. Tighten the nut (1). RH-9820...
  • Page 194: Adjusting The Looper Base Home Position

    At this time, “X” will appear in the display (A). 4. Press the key (4) to change the display (A) to “θ”. When “θ” is displayed, the X and Y feed motors will be turned off, so that the feed base can be moved by hand. 0972B 0819B RH-9820...
  • Page 195 If they are not aligned, repeat steps 5 and 6 until they are aligned. 8. Press the TEST key (7). Home position adjustment mode will end and the sewing machine will return to home position standby. 1194B 0764B 0733B RH-9820...
  • Page 196: Adjusting The Feed Base X Home Position And Y Home Position

    [When “Y” is displayed] The X-feed motor, Y-feed motor and motor (θ) for driving the looper base will all be turned on, so that the looper base and needle bar gear block cannot be moved by hand. 0972B 0819B RH-9820...
  • Page 197 5-3. When you press the key (1) to change the offset value (B), the feed base (7) will move as the keys are pressed. The setting range is -2.00 - +2.00 mm (in units of 0.05 mm). 0766B (Continued on next page) RH-9820...
  • Page 198: Adjusting The Needle Up Signal Home Position For The Upper Shaft And Upper Shaft Motor

    1. Remove the face plate (1) and the upper cover (2). 2. Remove the rubber cap (3). 3. Insert the accessory pin (4) into the groove (6) in the balance collar from the hole (5) in the arm to stop the upper shaft from turning. (Upper shaft: 22.5° position) RH-9820...
  • Page 199 8. Move the position of the slot (13) to the point where the panel display (B) switches from “ON” to “OFF”, and tighten the bolt (12) at that point. 9. Press the POWER switch at the OFF side (14) to turn off the power. 0771B RH-9820...
  • Page 200: Adjusting The Upper Shaft Stop Position

    If you continue to the next step without pressing the ENTER key (5), the offset value will not be changed. 6. Press the TEST key (6). Upper shaft stop position adjustment mode will end and the sewing machine will return to home position standby. 0772B RH-9820...
  • Page 201: Installing (replacing) The Sub Clamp On The Left Side

    2. Remove the feed base unit (1) from the bed. (Refer to “5-3. Feed mechanism”.) 3. Disconnect the air tubes (2) and (3) from the joints (4) and (5). 4. Remove retaining ring C (6). (Continued on next page) RH-9820...
  • Page 202 9. Set the joint (14) and the cylinder rod (15) so that they are facing as shown in the illustration. (Top) (Bottom) 1170B 10. Insert the shaft (16) of the sub clamp connecting rod into the hole in the feed base, and then install retaining ring C (6). 11. Tighten the two screws (7). RH-9820...
  • Page 203 16. Remove retaining ring C (21), and then remove the sub clamp arm (22). 17. Remove retaining ring C (23), loosen the two set screws (24), and then remove clamp support shaft J (25) in the direction of the arrow. (Continued on next page) RH-9820...
  • Page 204 23. Install sub clamp wrist L (34) to the sub clamp arm (22), and then secure it by tightening the socket bolt (36). (Refer to “7-26-4. Adjusting the position of the sub clamp”.) 24. Install the spring (20) to the sub clamp arm (22) and the clamp shaft holder (29). RH-9820...
  • Page 205 26. Tighten the two set screws (24) so that the clearance between the clamp shaft holder (37) and clamp lever R (38) is 2.5 ± 0.5 * Check that the sides of work clamp R (39) and needle plate R (40) are aligned at this time. If they are not aligned, loosen the socket bolt (41) and adjust. RH-9820...
  • Page 206: Electrical Mechanism

    At such times, be extremely careful never to touch anywhere other than the specified locations. In addition, note that high voltages may remain for up to 5 minutes after the power is turned off. Injury Be careful not to touch metallic objects such as the heat sink and cover when connecting and disconnecting connectors and making measurements. RH-9820...
  • Page 207: Inside The Control Box And Operation Panel Structure

    Secured to the inside of the operation panel. This P.C. board is used for displaying the sewing machine status and for input operations. Control box Operation panel Filter NF P.C. board Power supply Panel P.C. board motor P.C. board Main P.C. board Filter Conversion PMD P.C. board transformer 1199B 0692B RH-9820...
  • Page 208: Description Of Fuses

    Fuse 3AFB DC fan motor does not operate and [E740] is 616167-001 (Glass tube fuse 3A-250V) displayed. Fuse 15AFB Power indicator does not illuminate and nothing SA3794-001 (Glass tube fuse 15A-250V) operates. Power supply motor P.C. board 4590Q RH-9820...
  • Page 209: Description Of Connectors

    As a result, check that all connectors are inserted correctly and that the pins and wires are crimped properly before carrying out problem diagnosis. 8-4-1. Connector positions Main P.C. board 1200B This is a spare signal for special orders. RH-9820...
  • Page 210 8. ELECTRICAL MECHANISM PMD P.C. board 0693B Power supply motor P.C. board 4593Q RH-9820...
  • Page 211 8. ELECTRICAL MECHANISM Panel P.C. board 0694B RH-9820...
  • Page 212: Symptoms When There Are Poor Connections

    Trouble symptom Connector No. and position • The θ pulse motor operates, but the home position is not detected correctly. • [E220] is displayed. 0755B • The θ pulse motor does not operate. • [E220] or [E221] is displayed. 0756B RH-9820...
  • Page 213 Connector No. and position • Power indicator does not illuminate and sewing machine does not operate. • Operation is unstable. 5244Q • [E403] is displayed when the power is turned on and the sewing machine does not start. 4717Q RH-9820...
  • Page 214 Work clamp drops when work clamp switch (left) is depressed Sewing machine starts when start switch (right) is depressed 5247Q • After the power is turned on, [E055] is displayed. 5248Q • After the power is turned on, [E450] is displayed. 5249Q RH-9820...
  • Page 215: Troubleshooting

    Refer to “8-5-3. Remedy” for the item that corresponds to the problem #. Carry out the Remedy inspections for the problems in the order of the numbers in the “Cause” column. NOTE: When replacing the fuses, be sure to use a fuse with the same material and rating. RH-9820...
  • Page 216: Diagnosis Flowchart

    8. ELECTRICAL MECHANISM 8-5-2. Diagnosis flowchart Description of symbols Setting and status Switch operation Continued on previous/next page Judgment Power switch OFF “Problem” symbol in the “8-5-3. Remedy” lists 0760B RH-9820...
  • Page 217 8. ELECTRICAL MECHANISM 0761B RH-9820...
  • Page 218 8. ELECTRICAL MECHANISM 0762B RH-9820...
  • Page 219: Remedy

    1-2, 3-4 and 5-6 of the 6-pin connector coming out from the transformer. [Fig. C] 4878Q 3) OK if there is continuity between pins 1-2 and 4-5 of the 5-pin connector coming out from the transformer. [Fig. D] 4879Q RH-9820...
  • Page 220 After measuring, turn off the power. 5085Q 7. Malfunction of panel P.C. board Check that connector P1 (PANEL) is inserted Panel P.C. board into the main P.C. board, and that connector Panel harness CN5 (MAIN) is inserted into the panel P.C. board. RH-9820...
  • Page 221 1) Check if there are any thread scraps blocking Fan motor assembly malfunction of the cooling fan. the cooling fan. 2) Check that connector P8 (SENSOR1) is inserted into the main P.C. board. 3) Check the fan signal input while referring to “2-6. Input checking method”. RH-9820...
  • Page 222 “ 2-3. Memory switch setting method (Advanced)”. Malfunction of encoder Check the mechanisms for the X axis, Y axis and Pulse motor X assembly θ axis home position sensors while referring to Pulse motor Y assembly Pulse motor θ assembly “2-6. Input checking method”. RH-9820...
  • Page 223 [E200] is displayed, there inserted into the main P.C. board. is a malfunction of the X axis 2) Check the X axis home position sensor (encoder) home position sensor (encoder). input while referring to “ 2-6. Input checking method”. RH-9820...
  • Page 224 Pulse motor P assembly into the main P.C. board. slightly then [E220] 2) Check the θ axis home position sensor displayed, there is a malfunction of the θ shaft home position (encoder) input while referring to “2-6. Input checking method”. sensor (encoder). RH-9820...
  • Page 225 30 minutes or more. operates when the sewing machine 2) Turn the power back on; OK if operation is is operated at short cycle. normal. Avoid repeated sewing of sewing data that is less than 15 stitches. RH-9820...
  • Page 226 P.C. motor P.C. board PMD P.C. board, measure the voltage at the cord. board OK if approximately 30 V DC between pins 3-4. 4892Q 6. Malfunction of main P.C. board Main P.C. board 7. Malfunction of motor Motor RH-9820...
  • Page 227 P.C. board. Problem #15 Hammer does not operate (when set to cutting after sewing). Cause Inspection/Remedy/Adjustment Replacement if a malfunction Malfunction of valve or valve harness Check that connector P25 (AIR2) is inserted Valve harness into the main P.C. board. RH-9820...
  • Page 228: Error Codes

    An operation panel key was still being pressed Turn off the power and check that no keys are being E065 when the power was turned on, or key is faulty. pressed. :Refer to the reference page in “10. ERROR CODES” in the instruction manual. RH-9820...
  • Page 229 Sewing machine motor is overheating, or E150 Check that the upper shaft motor connector P4 and temperature sensor is faulty. synchronizer connector P5 are connected at the power supply motor P.C. board. RH-9820...
  • Page 230 θ-feed motor encoder connector P5 is connected at position sensor connection. the main P.C. board. Turn off the power, and then check if there are any θ-feed motor stopped due to a problem. E221 problems in the θ-feed direction. RH-9820...
  • Page 231 Turn the power off and then back on again. memory. E480 Problem with RAM on main P.C. board. Turn the power off and then back on again. [P.C. board and connector positions] Power supply P.C. board PMD P.C. board Main P.C. board 0535B RH-9820...
  • Page 232 Replace with the power supply motor P.C.B. for the RH-9820 as soon as possible. E580 Error in EEPROM version detected. Turn off the power and carry out level 3 initialization. E581 Error in memory switch version detected.
  • Page 233 :Refer to the instruction manuals for the corresponding devices. If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the place of purchase. RH-9820...
  • Page 234: Troubleshooting

    Eye looper tip is blunt. looper with a new one. Install the needle so that it faces Instruction Needle is not installed correctly. correctly. manual Select a needle that is suitable for the Instruction Needle is too thin. sewing conditions. manual RH-9820...
  • Page 235 Lower thread tension is too strong or too Adjust the lower thread tension to the weak. correct tension. manual Tension or stroke of thread take-up Adjust the tension and stroke of the Instruction spring is incorrect. thread take-up spring. manual RH-9820...
  • Page 236 SERVICE MANUAL Printed in Japan RH-9820 I6100920B 2007. 03. B (1)

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