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Brother S-7200C Instruction Manual

Single needle direct drive straight lock stitcher with thread trimmer.
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S-7200C
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
INSTRUCTION MANUAL

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Table of Contents

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  • Page 1 S-7200C INSTRUCTION MANUAL Please read this manual before using the machine. Please keep this manual within easy reach for quick reference. SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER WITH THREAD TRIMMER...
  • Page 2 Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly. S-7200C...
  • Page 3: Safety Instructions

    ) 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”.) S-7200C...
  • Page 4 When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur. S-7200C...
  • Page 5: Maintenance And Inspection

    If the power switch needs to be left on when before using the machine. carrying out some adjustment, be extremely careful Any problems in machine operation which result to observe all safety precautions. from unauthorized modifications to the machine will not be covered by the warranty. S-7200C...
  • Page 6 Direction of operation * Safety devices: (A) Finger guard (B) Thread take-up cover Oil pan Transformer box Control box (100 V/400 V system only) 4123M S-7200C...
  • Page 7: Table Of Contents

    ....34 14. TROUBLESHOOTING ......63 8-1. Changing the needle stop position ....34 14-1. Sewing ............63 8-2. Slow start............35 14-2. Error code displays ........68 8-3. Correction sewing........... 36 15. 7-SEGMENT DISPLAY ......72 8-4. Thread trimming lock ........37 S-7200C...
  • Page 8: Machine Specifications

    Lubricated / Lubricated / Rotary hook RP for light materials for medium materials for heavy materials (lubrication-free rotary hook) Lubricating oil -30[], -40[] -33[], -43[] -45[] Rotary hook High-speed spindle High-speed spindle Needle bar Special Brother grease Special Brother grease S-7200C...
  • Page 9: Names Of Major Parts

    Power switch Oil gauge window (-[]0[], []3[] specifications) Reverse lever (10) Stitch length dial (11) (12) Machine pulley Oil feeding pocket (-[]0[]・[]3[]specifications) (13) Operation panel (14) Cotton stand (15) Control box Safety devices (16) Thread take-up cover (17) Finger guard S-7200C...
  • Page 10: Installation

    Returning the machine head to the upright position 1. Clear away any tools, etc. which may be near the table holes. 2. While holding the face plate with your left hand, gently return the machine head to the upright position with your right hand. 2089M S-7200C...
  • Page 11: Table Processing Diagram

    Control box mounting hole 4126M 3-2. Installation 1. Control box (1) Control box (2) Bolts [3 pcs] (3) Nuts [3 pcs] (4) Spring washers [3 pcs] (5) Washers [3 pcs] 2. Connecting rod (6) Connecting rod (7) Nut 4127M S-7200C...
  • Page 12: Oil Pan

    Tap the head rest (3) securely into the table hole. If the head rest (3) is not pushed in as far as it will go, the machine head will not be sufficiently stable when it is tilted back. 4129M S-7200C...
  • Page 13: Operation Panel

    (1) Sticker 4131M 9. Cotton stand (1) Cotton stand NOTE: Securely tighten the nut (4) so that the two rubber cushions (2) and the washer (3) are securely clamped and so that the cotton stand (1) does not move. 3636M S-7200C...
  • Page 14 (6) is at the desired position within a distance of 16 mm of the needle plate when the knee liter plate (1) is fully pressed. 9. After adjustment is completed, securely tighten the nut (10). Within 16 mm 4135M S-7200C...
  • Page 15: Lubrication (-[]0[], []3[] Specifications)

    (5). 7. Close the oil feeding pocket cover (3). <Lubrication oil replenishment interval> Be sure to add more oil if the oil gauge (6) is below the lower reference line. Upper reference line Lower reference line 4136M S-7200C...
  • Page 16: Connecting The Cords

    3-4-1. Opening the control box cover (1) Screw (2) Cover 4137M 3-4-2. Connecting the cords 1. Sewing machine cords 4138M S-7200C...
  • Page 17 (2) using the repeat cable tie (1), otherwise vibration from the sewing machine may cause the cords become disconnected, <Securing> which can cause problems with the operation of the control box. Cords <Closing the cover> 4141M S-7200C...
  • Page 18: Other Cords

    Take care when tapping in the staples (3) to make sure that they do not pierce the cords. extension cords, otherwise machine operation <Seen from underneath table> problems may result. Control box Green and yellow wire (ground wire) 4144M S-7200C...
  • Page 19 NOTE: Take care when tapping in the staples (5) to make sure that they do not pierce the cords. extension cords, otherwise machine operation problems may result. Green and yellow wire (ground wire) 4147M S-7200C...
  • Page 20 NOTE: Take care when tapping in the staples (7) to make sure that they do not pierce the cords. extension cords, otherwise machine operation problems may result. Green and yellow wire (ground wire) 4150M S-7200C...
  • Page 21: Test Operation (operating The Treadle)

    (1) is returned to the neutral position (A). (when needle down stopping has been set.) 4. If the treadle (1) is pressed to position (D), thread trimming is carried out and the needle then rises above the needle plate and stops. 2117M S-7200C...
  • Page 22: Preparation Before Sewing

    * There is an anti-spin spring (3) inside the bobbin case. The anti-spin spring (3) prevents the bobbin from racing at times such as during thread trimming. * Use bobbins (2) made of light alloy as specified by BROTHER. 2120M For thick materials 0798M 2121M S-7200C...
  • Page 23: Winding The Lower Thread

    (2), and then pull it out from the thread guide (3). 4. Check that the bobbin turns clockwise when the thread is pulled. 5. Hold the latch (4) on the bobbin case and insert the bobbin case into the rotary hook. 2126M S-7200C...
  • Page 24: Threading The Upper Thread

    The machine may operate if the treadle is depressed by mistake, which could result in injury. Turn the machine pulley and raise the thread take-up (1) before threading the upper thread. This will make threading easier and it will prevent the thread from coming out at the sewing start. 4155M S-7200C...
  • Page 25: Adjusting The Stitch Length

    If this is done, the thread wiper (2) will operate after the thread is trimmed. 4157M 4-8. Using the knee lifter The presser foot (2) can be raised by pressing the knee lifter plate (1). 4158M S-7200C...
  • Page 26: Using The G50 Operation Panel (basic Operations)

    A, B, C and D, the thread is trimmed automatically. 4163M Fixed stitch key When this key is pressed so that the indicator illuminates, the number of stitches (1-1999) in the E stitch number display is sewn, and then the sewing machine stops automatically. 4164M S-7200C...
  • Page 27 (18) is disabled. • If you press the thread trimming lock key (13) so that its indicator illuminates while the indicator of the thread wiper key (18) is illuminated, the indicator of the thread wiper key (18) will switch off. 4174M S-7200C...
  • Page 28: Sewing Start And End Backtack Stitches

    • If the indicator of the thread trimming lock key is illuminated, the sewing machine will stop in the needle up position without thread trimming being carried out. 2160M S-7200C...
  • Page 29: Sewing Continuous Backtack Stitches

    When the AUTO key is pressed to turn on the automatic sewing function, operation will be carried out automatically from continuous backtack sewing through to thread trimming just by depressing the treadle once, without needing to keep it depressed continuously. S-7200C...
  • Page 30: Sewing Fixed Stitches

    • If changing the number of end backtack stitches in C and D, press the fixed stitch key to temporarily turn off the fixed stitch function before making the change. (The CD display will show the number of stitches and the setting can then be changed.) S-7200C...
  • Page 31: Sewing Name Labels

    • If changing the number of start and end backtack stitches in A, B, C and D, press the name label stitch key to turn off the name label function before making the change. (The ABCD display will show the number of stitches and the settings can then be changed.) S-7200C...
  • Page 32: Sewing Pleat Presser Stitches

    • If changing the number of end backtack stitches indicated in C and D, press the pleat presser sewing key to turn off the pleat presser sewing function before making the change. (The CD display will show the number of stitches and the setting can then be changed.) S-7200C...
  • Page 33: Using The Lower Thread Counter

    4. When the RESET key (2) is pressed, the warning icon (1) will switch off and the display will return to showing the initial values. Sewing using the treadle will then be possible. S-7200C...
  • Page 34: Using The G50 Operation Panel (advanced Operations)

    • When the needle up icon (24) is illuminated, the needle bar stops in the up position. • When the needle down icon (25) is illuminated, the needle bar stops in the down position. 4188M 2207M 2208M S-7200C...
  • Page 35: Adjusting The Needle Up Stop Position

    10° for the upper shaft. Becomes higher Becomes lower 4191M 2138M 2139M The setting values will be memorized. 4192M Normal sewing machine operation will then be possible. 4193M * For details on other adjustment items, refer to the Service Manual. S-7200C...
  • Page 36: Lock Key

    This key is used to make settings for various functions. ENTER key (4) This key is used to accept function settings. MAX key (5) This key is used to change the maximum sewing speed. * Refer to the Service Manual for details on using these keys. 4194M S-7200C...
  • Page 37: Resetting All Settings To Their Defaults

    “ init SEW ” Initializes programs 4196M Once initialization is complete, the main display will return to green. (Press for 2 seconds or more) 4192M Initialization mode will be exited and normal sewing machine operation will then be possible. 4193M S-7200C...
  • Page 38: Using The G10 Operation Panel (basic Operations)

    “8-4. Thread trimming lock”.) ・ If thread trimming lock is set when the indicator of this key is illuminated, the indicator of the thread wiper key (6) will switch off. 4174M S-7200C...
  • Page 39: Sewing Start And End Backtack Stitches

    ・ If the treadle is depressed backward before sewing of the set number of start backtack stitches is complete, end backtacking will not be carried out. ・ If thread trimming lock is set, the sewing machine will stop in the needle up position without thread trimming being carried out. 2160M S-7200C...
  • Page 40: Sewing Continuous Backtack Stitches

    ・ If thread trimming lock is set, the sewing machine will stop in the needle up position without thread trimming being carried out. 2159M S-7200C...
  • Page 41: Using The G10 Operation Panel (advanced Operations)

    4204M 2138M 2139M The setting will be stored and the display will (Setting item) return to the setting item. 4205M Setting mode will be exited and normal operation will be possible. 4206M S-7200C...
  • Page 42: Slow Start

    4208M 2138M 2139M The setting will be stored and the display will (Setting item) return to the setting item. 4209M Setting mode will be exited and normal operation will be possible. 4206M S-7200C...
  • Page 43: Correction Sewing

    4208M 2138M 2139M The setting will be stored and the display will (Setting item) return to the setting item. 4211M Setting mode will be exited and normal operation will be possible. 4206M S-7200C...
  • Page 44: Thread Trimming Lock

    4208M 2138M 2139M The setting will be stored and the display will (Setting item) return to the setting item. 4213M Setting mode will be exited and normal operation will be possible. 4206M S-7200C...
  • Page 45: Setting The Maximum Sewing Speed

    While the indicator of the MAX key is illuminated, all keys other than the keys for the A and B columns will be disabled. If the MAX key is pressed once more, the indicator of the MAX key will switch off and normal key operations can then be carried out. S-7200C...
  • Page 46: Adjusting The Needle Up Stop Position

    4219M 2138M 2139M The setting will be stored and the display will return (Setting item) to the setting item. 4220M Normal sewing machine operation will then be possible. 4206M * For details on other adjustment items, refer to the Service Manual. S-7200C...
  • Page 47: Lock Function

    “in.AL” will appear in the display (1). press the power ON switch.) Once initialization is complete, the “in.AL” appearing in the display (1) will disappear and normal sewing machine operation will then be possible. (Press for 2 seconds or more) 4206M S-7200C...
  • Page 48: Sewing

    3. Depress the treadle to start sewing. 2114M 4309M 9-2. Backtacking When the actuator switch (1) or the reverse lever (2) is 4224M pressed during sewing, the feed direction will be reversed. When it is released, the feed direction will return to normal. 4225M S-7200C...
  • Page 49: Sewing Condensed Stitches

    (2). (Condensed stitches are sewn while the actuator switch (1) or reverse lever (2) is being pressed.) * To stop sewing condensed stitches, tighten the bolt (6) so that its head is not touching the solenoid lever (7). 4228M S-7200C...
  • Page 50: Thread Tension

    After the lower thread tension has been adjusted, adjust the upper thread tension so that a good, even stitch is obtained. 1. Lower the presser foot. 2. Adjust by turning the tension nut (2). Becomes weaker Becomes stronger 4229M S-7200C...
  • Page 51: Adjusting The Presser Foot Pressure

    If the tension of the pretension (1) is increased, the lengths of the threads trailing from the needle tips will be reduced; if the tension is reduced, the lengths will be increased. Adjust by turning the pretension (1). Shorter Longer 4232M S-7200C...
  • Page 52: Adjusting The Thread Take-up Amount (-[][]3 Specifications)

    (2) until it touches the screw stop on the thread take-up support shaft (4). 6. After this, tighten the set screw (3). 7. Install the two rubber caps (1). 8. Install the face plate. Screw stop 4233M S-7200C...
  • Page 53: Cleaning

    8. Remove the bobbin from the bobbin case (4) and clean the bobbin case (4) with a cloth. 9. Insert the bobbin into the bobbin case (4), and then place the bobbin case (4) back into the machine. 2184M S-7200C...
  • Page 54 4. Return the machine head to its original position. NOTE: The rubber cap (3) has a hole in it for adjusting the air pressure. Approx. 2 mm When replacing the rubber cap (3) use only the replacement part specified by Brother. 2188M S-7200C...
  • Page 55 4238M 3. Checking 1. Replace the needle if it is bent or if the tip is broken. 2. Check that the upper threads have been threaded correctly. (Refer to page 17.) 3. Carry out a test sewing. 4239M S-7200C...
  • Page 56: Applying Grease (-[]3[], []5[] Specifications*)

    If this happens, apply grease and carry out the reset procedure. * If you continue to use the sewing machine after carrying out the reset procedure but without applying grease, problems with the sewing machine may result. <Applying grease> Use Brother-specified “Grease unit (SA8837-001)”. Using the tube 4087M S-7200C...
  • Page 57 4. The main display (1) will change to “GuCt 0”. 5. Press the ENTER key (5). The main display (1) will change to stitch number display mode and treadle operation will be possible. (This completes the reset procedure.) 2138M 2139M S-7200C...
  • Page 58: Applying Grease (-[]3[], []5[] Specifications*)

    If this happens, apply grease and carry out the reset procedure. * If you continue to use the sewing machine after carrying out the reset procedure but without applying grease, problems with the sewing machine may result. <Applying grease> Use Brother-specified “Grease unit (SA8837-001)”. Using the tube 4087M S-7200C...
  • Page 59 6. The display (1) will change to “ 0”. 7. Press the thread wiper key (2). The display (1) will change to stitch number display mode and treadle operation will be possible. (This completes the reset procedure.) 2138M 2139M S-7200C...
  • Page 60: Adjusting The Rotary Hook Lubrication Amount (-[]0[], []3[] Specifications)

    “Checking the lubrication amount” above. * Turn the adjusting screw (3) and check the lubrication 4245M amount repeatedly until the lubrication amount is correct. 4. Check the lubrication amount again after the sewing machine has been used for approximately two hours. S-7200C...
  • Page 61: Standard Adjustments

    (1) to the preferred position <A> or <B>. 3. Tighten the two screws (2). < > Actuator switch rotation function Additionally, the actuator switch (1) can be rotated 90 degrees as shown in the illustration. Select the position that is easier to use. 4248M 4247M S-7200C...
  • Page 62: Adjusting The Safety Switch Position

    If the spring stroke is too small, the safety switch will not operate. 3.5 mm or more Sewing machine Table Clearance is too large. By changing the position of the safety switch, the required spring stroke can be maintained. Reduce the clearance. 3692M 3690M S-7200C...
  • Page 63: Adjusting The Thread Take-up Spring

    NOTE: If using the tension gauge (7) (sold separately) to measure the tension, take the reading from the scale on the side of the red line. <-[][]S> <-[][]3> <-[][]5> 0.1 - 0.24N 0.25 - 0.35N 0.3 - 0.5N 4251M S-7200C...
  • Page 64: Adjusting Arm Thread Guide R

    (1) is at the standard height of 6 mm. 5. Tighten the bolt (6). 6. Replace the oil cap (5). 7. Adjust the presser foot pressure using the adjustment screw (4), and then tighten the nut (3). 4253M S-7200C...
  • Page 65: Adjusting Of The Feed Dog Height

    [B]) lower (Refer to “13-7. Adjusting the feed dog angle” on the next page for details of this operation.) 4254M Becomes higher Needle plate Standard Becomes lower 2281M Becomes higher Becomes higher Standard Standard Becomes lower Becomes lower 2282M S-7200C...
  • Page 66: Adjusting The Feed Dog Angle

    Needle has been adjusted, so it will be necessary to re-adjust the plate height of the feed dog (1). Standard Lower the front 2284M Back is lowered Raise the front Standard Standard Back is raised Lower the front 2285M S-7200C...
  • Page 67: Adjusting The Needle Bar Height

    NOTE: Do not turn the vertical cam (3) too far in the Needle timing is (Standard) Needle timing direction of (C), otherwise it could cause the advanced is retarded needle to break. 3. After adjustment is completed, securely tighten the two 4257M screws (5). S-7200C...
  • Page 68: Adjusting The Needle And Rotary Hook Timing

    The clearance should be 0.4 - 0.7 mm for -[][]S / [][]3 models, and 0.6 - 1.1 mm for -[][]5 models. <-[][]S / [][]3> 0.4 - 0.7mm <-[][]5> 0.6 - 1.1mm 2293M 4258M S-7200C...
  • Page 69: Adjusting The Treadle

    Turn the adjusting screw (5) clockwise. ・ To lower the presser foot (1) ... Turn the adjusting screw (5) counterclockwise. 5. Tighten the nut (4). * After making the adjustment, sew a piece of material to check the floating amount. Raise Lower 4310M S-7200C...
  • Page 70: Troubleshooting

    Is the thread take-up spring too weak? Adjust the tension of the thread take-up spring. Is the needle and rotary hook timing correct? Adjust the height of the needle bar. Adjust the clearance between the needle and the tip of the rotary hook. 0470M S-7200C...
  • Page 71 Use the sewing speed control keys to gradually reduce the sewing speed. (G50 operation panel) Gradually reduce the maximum sewing speed (G10 operation panel) Is the angle of the feed dog correct? Tilt the front of the feed dog down slightly. 0978M S-7200C...
  • Page 72 Incorrect thread trimming Is the needle properly installed? If it is incorrect, install the needle correctly. (Upper thread or lower thread being Is the fixed knife or movable knife blunt? trimmed) Replace the fixed knife or the movable knife. S-7200C...
  • Page 73 (If the power cord is too long or too many appliances are being run from a single outlet, this may cause voltage drops which will in turn cause the reset function to activate and stop the machine, even if the power supply itself is normal.) S-7200C...
  • Page 74 Insert connector securely. 4264M “GrEASEUP” or “GrUP” This display is to notify you that it is time to apply grease. flashes panel Apply grease. 49, 51* display when the power switch is turned on. S-7200C...
  • Page 75: Error Code Displays

    ・ Was the actuator switch being pressed when the power ON switch was pressed? Press the power OFF switch and check that the actuator switch is not being pressed ・ There is a problem with the actuator switch. Replace the actuator switch. S-7200C...
  • Page 76 ・ Is the 4-pin motor connector inside the control box disconnected? Press the power OFF switch and check the connection of the 4-pin motor Motor open phase connector. detected ・ Problem with drive P.C. board or motor. Replace the control box or the motor. S-7200C...
  • Page 77 ・ Model selection could not be loaded from the head detector unit. Check that the head detector unit specifications are correct. E451 ・ Problem with head detector unit. Replace the head detector unit. Error writing data to head detector unit S-7200C...
  • Page 78 Press the power OFF switch and set DIP switch No. 4 to OFF. 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. S-7200C...
  • Page 79: Segment Display

    15. 7-SEGMENT DISPLAY 15. 7-SEGMENT DISPLAY 4268M S-7200C...
  • Page 80: Instruction Manual

    INSTRUCTION MANUAL http://www.brother.com/ 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177 © 2008 Brother Industries, Ltd. All Rights Reserved. S-7200C SA9809-001 E 2008.07. B (1)

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