JUKI LK-1900A Instruction Manual
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JUKI LK-1900A Instruction Manual

JUKI LK-1900A Instruction Manual

Computer-controlled, high-speed, bartacking machine
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See also: Handbook , Engineer's Manual
Computer-controlled, High-speed,
Bartacking Machine
LK-1900A
LK-1901A
LK-1903A

INSTRUCTION MANUAL

NOTE :
Read safety instructions carefully and understand them before using.
Retain this Instruction Manual for future reference.
LK-1902A
LK-1903A-305
R
E-No.02
40012747

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Questions and answers

Darwin villegas
February 6, 2025

How to fix error11

User image 67a47b2611e09
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1 comments:
Mr. Anderson
May 14, 2025

To fix error 11 on the JUKI LK-1900A, follow these steps:

1. Turn OFF the power switch.
2. Check if the coupling of the main motor is loose.
3. Check if connector CN34 on the MAIN circuit board is loose.
4. Check if connector CN32 of the MAIN circuit board or connector CN15 of the SDC circuit board is loose.

Correct any loose connections or coupling issues found during these checks.

This answer is automatically generated

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Summary of Contents for JUKI LK-1900A

  • Page 1: Instruction Manual

    Computer-controlled, High-speed, Bartacking Machine LK-1900A LK-1901A LK-1902A LK-1903A LK-1903A-305 INSTRUCTION MANUAL NOTE : Read safety instructions carefully and understand them before using. Retain this Instruction Manual for future reference. E-No.02 40012747...
  • Page 2 FAX : (81)3-3430-4909 • 4914 • 4984 The description covered in this instruction manual is subject to change for improvement of the TELEX : J22967 commodity without notice. Copyright 2003-2004 JUKI CORPORATION. All rights reserved throughout the world. 04 · 03 Printed in Japan (E)

  • Page 3: Important Safety Instructions

    17. The machine is only allowed to be used for the purpose intended. Other used are not allowed. 18. Remodel or modify the machine in accordance with the safety rules/standards while taking all the effective safety measures. JUKI assumes no responsibility for damage caused by remodeling or modification of the machine.

  • Page 4: For Safe Operation

    FOR SAFE OPERATION 1. To avoid electrical shock hazards, neither open the cover of the electrical box for the motor nor touch the components mounted inside the electrical box. 2. After changing the pattern, make sure the needle entry point. If the pattern is protruded from the work clamp feet, the needle will interfere with the work clamp feet during sewing, and it is dangerous due to the needle breakage or the like.

  • Page 5: Table Of Contents

    CONTENTS . EXPLANATION OF LK-1900A, COMPUTER-CONTROLLED HIGH-SPEED BARTACKING MACHINE ..............1 [1] SPECIFICATIONS ..........................1 [2] CONFIGURATION ..........................2 1. Names of main unit ............................2 2. Names and explanation of switches on the operation panel ............... 3 [3] INSTALLATION ............................4 1.

  • Page 6: Eyelet Buttonhole Bartacking Machine

    [9] OTHERS ............................... 45 1. Setting the DIP switch ........................... 45 2. Table of the standard pattern specifications ....................46 3. Table of the standard patterns ........................47 4. Table of the work clamp foot ......................... 49 5. LK-1900 data ROM ............................51 6.

  • Page 7: Explanation Of Lk-1900A, Computer-Controlled High-Speed Bartacking Machine

    1. EXPLANATION OF LK-1900A, COMPUTER-CONTROLLED HIGH- SPEED BARTACKING MACHINE [1] SPECIFICATIONS 1) Sewing area ..........X (lateral) direction 40 mm Y (longitudinal) direction 30 mm 2) Max. sewing speed ........* 3,000 rpm (When sewing pitches are less than 5 mm in X-direction and 3.5 mm in Y -direction.)

  • Page 8: Configuration

    [2] CONFIGURATION 1. Names of main unit q Machine head w Work clamp feet e Thread stand r Operation panel t Power switch y Control box u Pedal switch...

  • Page 9: Names And Explanation Of Switches On The Operation Panel

    2. Names and explanation of switches on the operation panel i Item selection LED q “Ready” key This key changes over the setting state from the LEDs of the selected items light up. panel to the sewing state where the sewing machine actually operates.

  • Page 10: Installation

    [3] INSTALLATION 1. Installing the electrical box Install the electrical box on the underside of the table at the location illustrated using round-head bolt q, plain washer w, spring washer e and nut r supplied with the machine, and using bolt having hexagonal indentation on the head t, spring washer y and plain washer u supplied with the machine.

  • Page 11: Installing And Connecting The Power Switch

    4. Installing and connecting the power switch (1) Installing the power switch Fix power switch under the machine table with wood screws Fix the cable with staples supplied with the machine as accessories in accordance with the forms of use. * Five staples including the staple for fixing the operation panel cable are supplied as accessories.

  • Page 12: Installation Of The Sewing Machine Head

    5. Installation of the sewing machine head WARNING : To prevent possible accidents caused by the full of the sewing machine, perform the work by two persons or more when the machine is moved. 1) Fit hinge rubber q to the hinge shaft ,and fix the sewing machine main unit.

  • Page 13: Safety Switch

    7. Safety switch Remove tape q fixing the lever section of safety switch w. 1. When using the safety switch without removing tape q, it is very dangerous since the sewing machine works even in the state that it is tillted. Impor tant 2.

  • Page 14: Installing The Operation Panel

    9. Installing the operation panel Fix operation panel installing plate q on the machine table with wood screws w and pass the cable through hole r in the machine table. Fix the operation panel on panel installing plate q with screws e supplied as accessories.

  • Page 15: Connecting The Cord

    10. Connecting the cord Remove four screws E fixing the rear cover of the electrical box. When opening the rear cover, pressing it with your hands, slowly open it by approximately 90˚ until it stops as illustrated. Be sure to lend your hand to the rear cover in order not to let the rear cover fall.

  • Page 16: Installing The Motor Cover

    1) Take care so that the cord is not caught between the rear cover and the electrical box main body, close the rear cover while pressing section A on the lower side of the rear cover, and tighten four screws q. 2) Lower downward the cord located on the side of the control box and cord presser plate C in the push hole B, press the cord and tighten screws w.

  • Page 17: Managing The Cord

    12. Managing the cord Slack 1) In the state that the sewing machine is tilted, connect the cords, and bundle them with clip band q as shown in the figure. 2) Fix the cords with cords setting plate w in the state that the cords slacken as shown in the figure. When you tilt the sewing machine, make sure that the sewing machine head support bar is placed on the table.

  • Page 18: Installing The Thread Stand

    14. Installing the thread stand 1) Assemble the thread stand unit, and insert it in the hole in the machine table. 2) Tighten locknut q to fix the thread stand. 3) For ceiling wiring, pass the power cord through spool rest rod w.

  • Page 19: Operation Of The Sewing Machine

    [4] OPERATION OF THE SEWING MACHINE 1. Lubrication WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Check that the place between lower line B and upper line A is filled with oil.

  • Page 20: Threading The Machine Head

    3. Threading the machine head WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Thin synthetic thread or the like Pull out the thread by approximately 4 cm from the needle after threading through the needle. 1.

  • Page 21: Installing The Bobbin

    5. Installing the bobbin WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Set the bobbin q into bobbin case w in the direction 2.5 cm shown in the figure.

  • Page 22: Adjusting The Thread Take-Up Spring

    7. Adjusting the thread take-up spring The standard stroke of thread take-up spring is 8 to 10 mm, and the pressure at the start is 0.1 to 0.3N. 1) Adjusting the stroke Loosen setscrew , and turn thread tension asm. Turning it clockwise will increase the moving amount and the thread drawing amount will increase.

  • Page 23: Operation Of The Sewing Machine (Basic)

    [5] OPERATION OF THE SEWING MACHINE (BASIC) 1. Item data setting Set each item following the procedure described below. Setting of the Setting of the Setting of the Setting of the Setting the max. sewing pattern No. X scale Y scale thread tension speed limitation (1) Turn ON the power switch.
  • Page 24 (4) Setting of the Y scale 1) Press the key to indicate the item “Y Scale” 2) Press the key to indicate “100”. (Set X scale to 100%.) The setting exceeding 100% is dangerous since needle and the cloth presser interferes with each other and needle breakage or the like will occur.

  • Page 25: Checking The Contour Of A Sewing Pattern

    (7) Finish of setting 1) Press the key. 2) After the work clamp feet have moved and gone up, the sewing LED lights up, and the sewing is ready. When the presser is raised, be careful that fingers are not caught in the presser since the presser moves after having lowered.

  • Page 26: Sewing

    3. Sewing 1) Set a workpiece on the work clamp foot section. 2) Depress the pedal switch to the first step, and the work clamp feet will come down. If you detach your foot from the pedal switch, the work clamp feet will go up.

  • Page 27: Winding A Bobbin

    5. Winding a bobbin 5-1. To wind a bobbin while the sewing machine is performing sewing Thread the bobbin winder and wind the bobbin thread onto the bobbin as illustrated in the figure. 5-2. To wind a bobbin independently 1) Press key to make the SEWING LED go off.

  • Page 28: Thread Clamp Device

    6. Thread clamp device Trouble of sewing (slip-off of needle thread, stitch skipping, or stain of needle thread) at the time of high- speed start can be prevented with the thread clamp device. The thread clamp device works in the state that the thread clamp indication LED lights up and does not work when the LED goes off.
  • Page 29 (3) When the type of lower plate q that material does not come in close contact with throat plate w is used, needle thread on the wrong side of material may be rolled in the seams regardless of needle thread play or sewing length.

  • Page 30: Operation Of The Sewing Machine (Advanced)

    [6] OPERATION OF THE SEWING MACHINE (ADVANCED) 1. Performing sewing using the pattern keys ( Patterns (No.1 to 200) which have been already registered can be registered to P1 to P50. It is possible to change and register the scale, max. speed limitation, thread tension and sewing position. Same as the patterns (No.1 to 200), P1 to P50 are used by the selection by scrolling the pattern Nos.
  • Page 31 6) Press key and set as follows with key. X Scale rate : “50”%, Y Scale rate “80”%, Max. speed limitation : “2000” rpm, Thread tension : “50” 7) Press key and “X Scale rate ” indication becomes 0.0. Traveling amount in X direction can be set in 0.1 mm unit.
  • Page 32 (2) Sewing operation Operation example : After performing sewing with the contents of the registered P2, perform sewing with the contents of P3. 1) Turn ON the power switch. 2) Press the key. 3) Press the key, and when the sewing LED lights up, the work clamp foot goes up after it has moved.

  • Page 33: Performing Sewing Using The Combination Function

    2. Performing sewing using the combination function By arranging in the order of use of the pattern register (P1 to P50) which have been already registered and registering in C1 to C20, the sewing pattern will change in the order every time the sewing machine finishes the sewing.
  • Page 34 (2) Sewing operation Operation example : Perform sewing with the contents of the registered C1. 1) Turn ON the power switch. 2) Set the pattern No. to “C1-1 ” using the key. Scroll as follows : / 0 to 99 ,/ P1 to P50 ,/ C1 to C20 , 3) Press the key.

  • Page 35: Performing Sewing Using The "Bobbin Thread Counter

    3. Performing sewing using the “bobbin thread counter” The production counter can be used as the bobbin thread counter. In case a same sewing pattern is sewn in repetition, the sewing machine will stop sewing when the number of times (the specified number) that can be sewn with a bobbin is reached.

  • Page 36: Setting The Pattern Thread Tension

    5. Setting the pattern thread tension Needle thread tension for 6 stitches at the sewing start, the portion which is changed over from basting stitch to zigzag stitch, and the portion of tie stitch at the sewing end can be individually set. 1) While the sewing LED lights up, press to indicate the needle thread tension 2) Lower the presser with the foot pedal.

  • Page 37: Cautions In Operation

    6. Cautions in operation (1) When the error indicator lamp lights up, be sure to check the cause of trouble and take a proper corrective measure. (2) Do not draw, by hand, the material being sewn during sewing. Doing so will cause the needle shift from the correct position.

  • Page 38: Adjusting The Needle-To-Shuttle Relation

    2. Adjusting the needle-to-shuttle relation WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Turn the handwheel by hand. When needle bar Relation between needle and engraved lines has gone up, adjust so that lower marker line engraved on the needle bar aligns with the bottom end of the needle bar bushing...

  • Page 39: Adjusting The Lift Of The Work Clamp Foot

    3. Adjusting the lift of the work clamp foot WARNING : As the work is performed while the power is ON, never touch the switches other than the necessary one so as to prevent accidents caused by the malfunction of switches. 1) With the machine in stop mode, remove six setscrews of the top cover, and take off top cover...

  • Page 40: Needle Thread Clamp Device

    5. Needle thread clamp device WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) When thread is caught at top end of the thread clamp, thread clamp becomes incomplete and sewing trouble at the sewing start will be caused.

  • Page 41: Draining Waste Oil

    7. Draining waste oil When polyethylene oiler becomes filled with oil, remove polyethylene oiler and drain the oil. 8. Amount of oil supplied to the hook 1) Loosen setscrew and remove setscrew 2) When screwing in adjustment screw , the amount of oil of oil pipe, left can be reduced.

  • Page 42: Changing The Voltage Of 100/200V

    10. Changing the voltage of 100/200V WARNING : To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, carry out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent accidents caused by unaccustomed work or electric shock, request the electric expert or engineer of our dealers when adjusting the electrical components.

  • Page 43: Replenishing The Designated Places With Grease

    11. Replenishing the designated places with grease When the sewing machine has been used for a certain number of times of sewing, error code No. E220 is displayed on the operation panel at the time of turning ON the power. This display informs the operator of the time of replenishing the designated places with grease.

  • Page 44: How To Use The Memory Switch

    [8] HOW TO USE THE MEMORY SWITCH The sewing machine operation can be changed by changing the setting of the memory switch. 1. Start and change of the memory switch 1) When key is pressed in the state that the sewing LED is put out, the memory switch setting mode is obtained.
  • Page 45 2) Press key in the state that memory switch No. 1 is indicated to make the sewing LED light up. The contents of memory switch No. 1 (max. sewing speed limitation value of the sewing machine) are indicated. 3) Set "1800" with key.
  • Page 46 4) Indicate "1000" with key. The value returns to the initial value at the time of delivery from the factory with key. Press key to cancel the operation here and return to the state of step 2). 5) Press key. The sewing LED goes off and the set value of the first stitch is registered.
  • Page 47 3) Press key. The sewing LED lights up and the set value of pattern No. 1 is indicated. Set value 1 : Calling is operative. Set value 0 : Calling is inoperative. 4) Set pattern No. 2 with key. 5) Set the set value to "0" with key.

  • Page 48: Table Of Functions Of The Memory Switch

    3. Table of functions of the memory switch Various operations of sewing machine can be set in programs by operating the memory switches. There are items that change the initial values at the time of delivery according to the models. Indication Function Setting range...
  • Page 49 Indication Function Setting range State when delivered Remarks Counter operation 0 : Production counter (adding) 1 : Bobbin thread counter (subtracting) Selection of pedal 0 : Standard pedal 1 : Standard pedal (2-step stroke) 2 : Optional pedal 3 : Optional pedal (2-step stroke) Selection of start pedal 0 : Standard pedal...
  • Page 50 Indication Function Setting range State when delivered Remarks State of work clamp foot when 0 : Work clamp foot goes up. machine stopped by temporary 1 : Work clamp foot goes up stop command can be selected. with work clamp foot switch.

  • Page 51: Others

    [9] OTHERS 1. Setting the DIP switch When “4” of DIP switch w on SDC circuit board q is SDC p.c.b. turned ON, the penetrating force is increased. Turn it ON when the penetrating force is insufficient. Turn OFF all DIP switches other than the switch above. Perform the changeover of DIP switch after turning OFF the power.

  • Page 52: Table Of The Standard Pattern Specifications

    2. Table of the standard pattern specifications Lengthwise Crosswise Number of stitches Pattern S, F, H Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Large size bartacking Small size bartacking (eyelet)

  • Page 53: Table Of The Standard Patterns

    3. Table of the standard patterns Sewing size Sewing size (Note 2) (Note 2) (mm) (mm) Stitch diagram Stitch diagram No. of work No. of work Length- Cross- Length- Cross- clamp foot clamp foot wise wise wise wise (51) (Note4) 1.
  • Page 54 Sewing size Sewing size Number of Number of (mm) (mm) Stitch diagram Stitch diagram stitches stitches Cross- Length- Cross- Length- wise wise wise wise ø12 ø8 (Caution) Pattern Nos. 41 to 46 are for the optional work clamp foot No. 12. The origin of the patterns is different by 5 mm up and down from that of lengthwise bartacking pattern Nos.

  • Page 55: Table Of The Work Clamp Foot

    4. Table of the work clamp foot 13518659 (asm.) 13548557 (asm.) 13542964 (asm.) Work clamp foot 14116107 14116404 14116800 14116305 14116206 (With knurl) (With knurl) (With knurl) (Without knurl) (Without knurl) Feed plate 21.2 11.4 Sewingspecification H / W Finger guard 13533104 S t a n d a r d Supplied with F (foundation) type...
  • Page 56 13548151(asm.) 13542451 (asm.) 13571955 (asm.) 13561360 (asm.) Work clamp foot 13548003 13554803 14116602 14116503 14116909 14116701 (With knurl) (With knurl) (Without knurl) (Without knurl) (Without knurl) (With knurl) Feed plate 27.4 37.3 Sewing H / W specification Finger 13548300 13533104 13573407 guard S t a n d a r d...

  • Page 57: Lk-1900 Data Rom

    ROM is prior to other pattern. ROM which can be used : 27C256 EPROM JUKI Part No. : HL008423000 6. Connection of the optional pedal (1) Connection of PK-57 1) Connect PK-57 change cable w with CN41 of MAIN circuit board q.

  • Page 61: Troubles And Corrective Measures (Sewing Conditions)

    8. Troubles and corrective measures (sewing conditions) Trouble Cause Corrective measures Page 1. The needle thread Stitches are slipped at the start. Adjust the clearance between the needle slips off at the start and the shuttle to 0.05 to 0.1 mm. of bar-tacking.
  • Page 62 Trouble Cause Corrective measures Page 6. The needle thread The needle thread tension is not Increase the needle thread tension. comes out on the high enough. wrong side of the The tension release mechanism Check whether or not the tension disc No. material.

  • Page 63: Table Of The Optional Parts

    9. Table of the optional parts Type Part No. Name of Parts Remarks Without knurl / processed 14120109 Feed plate blank Sewing area lengthwise 20 X crosswise 40 With knurl / processed 14120307 Sewing area lengthwise 20 X crosswise 40 Without knurl / stainless steel 14120505 t = 0.5...
  • Page 64 Name of Parts Type Part No. Remarks Finger guard (2) A=66.5 B=43 13573407 lengthwise bartacking Finger guard (3) A=21.5 B=35.5 14120000 For specially ordered work clamp SM8040302TP With knurl / processed (right) 40021869 Work clamp foot blan With knurl / processed (left) 40021870...

  • Page 65: Explanation Of The Lk-1901A, Computer-Controlled High-Speed Eyelet Buttonhole Bartacking Machine

    Be sure to perform the work with two persons or more when moving the sewing machine. 1) Except for the connection of the work clamp foot bracket unit solenoid, installation of LK-1901A and preparation of the operation are the same as those of the LK-1900A. Refter to the instruction manual for the LK-1900A.

  • Page 66: Adjustment Of The Material Closing Amount

    3. Adjustment of the material closing amount WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Graduation 1) The maximum material closing amount is 4 mm. However, the amount is set to 2 mm at the time of delivery because of the relation of the feed plate window and the work clamp foot (dimension C).

  • Page 67: Adjustment Of The Pressure Of The Work Clamp Unit

    Setting range “2” : The material closing simultaneously works with the sewing after the work clamp foot has come down. As for the contents of memory switch function Nos. other than memory switch No. 50, refer to the list of the memory switch functions described in the Instruction Manual for the LK-1900A.

  • Page 68: Selection And Confirmation Of The Sewing Patterns

    As for the way of operation for setting, checking or changing the sewing pattern, refer to the item “Operation of the sewing machine (basic)” described in the instruction material for the LK-1900A. After setting, check the needle entry point whether or not the needle interferes with the work clamp foot.

  • Page 69: Explanation Of The Lk-1902A, Computer-Controlled High-Speed Belt-Loop Attaching Machine

    3. EXPLANATION OF THE LK-1902A, COMPUTER-CONTROLLED HIGH- SPEED BELT-LOOP ATTACHING MACHINE 1. Specifications Different specifications from those of the LK-1900A only are described. 1) Sewing speed ..........Max. 2,700rpm 2) Needle ............DPx5 #14, #16 3) Lifting method of the work clamp foot ..Stepping motor 4) Lift of the work clamp foot ......

  • Page 70: Selection And Confirmation Of The Sewing Patterns

    As for the way of operation for setting, checking or changing the sewing pattern, refer to the item “Operation of the sewing machine (basic)” described in the instruction manual for the LK-1900A. After setting, make sure of the needle entry point whether or not the needle interferes with the work clamp foot.

  • Page 71: Explanation Of The Lk-1903A, Computer-Controlled High-Speed Lockstitch Button Sewing Machine

    . EXPLANATION OF THE LK-1903A, COMPUTER-CONTROLLED HIGH- SPEED LOCKSTITCH BUTTON SEWING MACHINE 1. Specifications Different specifications from those of the LK-1900A only are described. 1) Sewing speed ..........Max. 2,700rpm 2) Needle ............DPx17 #14 3) Lifting method of the work clamp foot ..Stepping motor 4) Lift of the work clamp foot ......

  • Page 72: Various Sewing Modes

    4. Various sewing modes (1) List of sewing patterns Number of threads and standard sewing size of X and Y are as shown in the following list. < Sewing program list > Pattern Stitch Number Standard Standard Pattern Stitch Number Standard Standard shape...

  • Page 73: Position Of The Button Clamp Jaw Lever

    No., adjust the sewing width by enlarging/reducing the sewing width. The way of enlarging/reducing is the same as that of the LK-1900A. Refer to the table given below for the scale for enlargement/reduction in terms of the sewing width.

  • Page 74: Adjusting The Feed Plate

    6. Adjusting the feed plate WARNING : When change of the shape of the button, change of the sewing pattern or enlargement/reduction of the sewing width is performed, make sure of the shape of the sewing pattern. If the feed plate interferes with the needle hole guide, it will result in the danger of the needle breakage or the like.

  • Page 75: Adjusting The Lifting Amount Of The Button Clamp

    8. Adjusting the lifting amount of the button clamp WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Max. 13mm Loosen two setscrews q, and move moving plate w back and forth in the direction of arrow to adjust. The lifting amount of the button clamp will be decreased when moving plate w is moved in the direction of A, and be increased when it is moved in the direction of B.

  • Page 76: Adjustment Of The Wiper Spring

    10. Adjustment of the wiper spring WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Wiper spring retains the needle thread after thread trimming in between wiper and the wiper spring.

  • Page 77: Model Classification According To The Button Size

    12. Model classification according to the button size Model LK-1903A-301 LK-1903A-302 Button size classification For small-sized buttons For medium-sized button Outside diameter of applicable buttons (mm) ø10 to ø20 ø10 to ø20 Length Sewing size (mm) 0 to 3.5 0 to 4.5 Width 0 to 3.5 0 to 4.5...

  • Page 78: Attaching The Shank Botton (Optional)

    13. Attaching the shank botton (optional) (1) Specifications Model Optional Needle TQx3 #14 Shape of button Outside diameter Max. ø20 Diameter of hole Min. ø1.5 Position of hole 1.5 mm or more Shape of shank section R(mm) Minimum Maximum R R R R R –...
  • Page 79 (2) Adjusting the height of the needle bar WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 4.3mm 1) Loosen needle bar connection screw q and move the needle bar w up or down so that second engraved marker line A as counted from the bottom is aligned with the bottom end of needlebar bushing e when turning the hand pulley to bring the needle bar to its lowest position.
  • Page 80 When checking the shape of the sewing pattern, fit the second stitch of the needle entry to the button hole, and tighten screw y. (Refer to the item of checking the shape of the sewing pattern in the instruction manual for the LK-1900A.)
  • Page 81 (7) Adjusting the button support rubber WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. To adjust the position of button support rubber asm. q, loosen setscrews w and e, and adjust so that the pressing section of the button support rubber can press the center of the button at right angles to the button.

  • Page 82: Drawing Of The Table

    Drawer stopper installing position One place on the rear side o Drilled hole 9, 20 spot face 17 deep e JUKI logotype !0 2- drilled hole 2, 10 deep on the rear side (Power switch installing hole) r 4- drilled hole 8...
  • Page 83 Drawer stopper installing position !0 Drilled hole 17 One place on the rear side !1 Drilled hole 28 e JUKI logotype !2 2- drilled hole 2, 10 deep on the rear r Drilled hole 8 side (Power switch installing hole)

This manual is also suitable for:

Lk-1901aLk-1902aLk-1903aLk-1903a-305

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