JUKI LK-1901AN Instruction Manual
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JUKI LK-1901AN Instruction Manual

JUKI LK-1901AN Instruction Manual

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ENGLISH
LK-1900AN
LK-1901AN
LK-1902AN
LK-1903AN
LK-1903AN-305
INSTRUCTION MANUAL

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Summary of Contents for JUKI LK-1901AN

  • Page 1 ENGLISH LK-1900AN LK-1901AN LK-1902AN LK-1903AN LK-1903AN-305 INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    CONTENTS !. EXPLANATION OF LK-1900AN, 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. Installing the electrical box...........................4 2. Attaching the connecting rod ..........................4 3. Installing the head support rod ..........................4 4. Installing and connecting the power switch .......................5 5. Installation of the sewing machine head ......................6 6. Installing the drain receiver and the head support rubber ................6 7. Safety switch ................................7 8. Tilting the sewing machine head .........................7 9. Installing the operation panel ..........................8 1 0. Connecting the cord ..............................9 1 1. Installing the motor cover ...........................10 1 2. Managing the cord .
  • Page 3 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. Connection of the optional pedal ........................51 7. e rror list ................................52 8 . troubles and corrective measures (sewing conditions)..................55 9. table of the optional parts ..........................57 @. eXPLANAtioN oF tHe LK-1901AN, ComPuteR-CoNtRoLLeD HiGH-sPeeD eyeLet ButtoNHoLe BARtACKiNG mACHiNe ...........59 1. Specifications ..............................59 2. installation of the sewing machine and preparation of the operation ............59 3. Adjustment of the material closing amount ......................60 4. Adjustment of the lift of the work clamp foot ....................60 5. Adjustment of the pressure of the work clamp unit ..................61 6. setting of the material closing operation ......................61 7. Selection and confirmation of the sewing patterns ..................62 #. eXPLANAtioN oF tHe LK-1902AN, ComPuteR-CoNtRoLLeD HiGH-sPeeD BeLt-LooP AttACHiNG mACHiNe ................63...

  • Page 4: Explanation Of Lk-1900An, Computer-Controlled High-Speed Bartacking Machine

    !. EXPLANATION OF LK-1900AN, COMPUTER-CONTROLLED HIGH- SPEED BARTACKING MACHINE [1] SPECIFICATIONS  Sewing area X (lateral) direction 40 mm Y (longitudinal) direction 30 mm 3,200 sti/min (When sewing pitches are less than 5 mm in X-direction 2 Max. sewing speed and 3.5 mm in Y -direction.) 3 Stitch length 0. to 0.0 mm (adjustable in 0. mm step) 4 Feed motion of work clamp foot...

  • Page 5: Configuration

    [2] CONFIGURATION 1. Names of main unit 1 Machine head 2 Work clamp feet 3 Thread stand 4 Operation panel 5 Power switch 6 Control box 7 Pedal switch － －...

  • Page 6: Names And Explanation Of Switches On The Operation Panel

    2. Names and explanation of switches on the operation panel 1 “Ready” key 8 Item selection LED LEDs of the selected items light up. This key changes over the setting state from the panel to the sewing state where the sewing ma- chine actually operates. 2 Sewing LED Pattern No. X scale Y scale This LED goes off at the time of setting state and lights up at the time of sewing state.

  • Page 7: 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 1 , plain washer 2 , spring washer 3 and nut 4 sup- plied with the machine, and using bolt having hex- agonal indentation on the head 5 , spring washer 6 and plain washer 7 supplied with the machine.

  • Page 8: Installing And Connecting The Power Switch

    4 . Installing and connecting the power switch (1) Installing the power switch Fix power switch 1 under the machine table with wood screws 2 . Fix the cable with staples 3 supplied with the machine as accessories in accordance with the forms of use. * Five staples 3 including the staple for fixing the operation panel cable are supplied as accessories.

  • Page 9: 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. ) Fit hinge rubber 1 to the hinge shaft ,and fix the sewing machine main unit. 2) When tightening nut 3 to hinge rubber 1 , tighten nut 3 until spring washer 2 becomes as B in the illustration, and fix it with nut 4 .

  • Page 10: Safety Switch

    7 . Safety switch Remove tape 1 fixing the lever section of safety switch 2 . 1. When using the safety switch without removing tape 1 , it is very dangerous since the sewing machine works even in the state that it is tillted. 2. In case error 302 occurs when the sewing machine works after setup, loosen the safe- ty switch fitting screw with a screwdriver, and lower the switchto the downside of the sewing machine. 8 . Tilting the sewing machine head WARNING : Tilt/raise the sewing machine head with both hands taking care not to allow your fingers to be caught in the head. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. When tilting the sewing machine head, tilt the head gently until it comes in contact with head support rod 1. Before tilting the sewing machine head, make sure that head support rod 1 is attached to the machine table.

  • Page 11: Installing The Operation Panel

    9 . Installing the operation panel Fix operation panel installing plate 1 on the ma- chine table with wood screws 2 and pass the cable through hole 4 in the machine table. Fix the operation panel on panel installing plate 1 with screws 3 supplied as accessories. Fix the cable on the bottom surface of the table with the staples supplied with the machine as accessories.

  • Page 12: 0. Connecting The Cord

    White CN16 White Sewing machine head CN14 Yellow CN39 White CN42 Blue CN43 CN44 Operation panel Yellow CN45 White CN40 White CN47 (LK-1901AN) Gray CN38 Gray CN34 CN16 White CN14 White CN38 Gray Earth cord CN44 Red CN34 Gray CN39 Yellow CN45 Yellow CN47 White CN40 White CN43 Blue CN42 White －...

  • Page 13: 1. Installing The Motor Cover

    ) 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 1 . 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 2 .

  • Page 14: 2. Managing The Cord

    12. Managing the cord Slack ) In the state that the sewing machine is tilted, connect the cords, and bundle them with clip band 1 as shown in the figure. 2) Fix the cords with cords setting plate 2 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 15: 4. Installing The Thread Stand

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

  • Page 16: 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. Fill there with oil using the oiler supplied with the machine as accessories when oil is short. The oil tank which is filled with oil is only for lubri- cating to the hook portion.

  • Page 17: 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 40mm from the needle after threading through the needle. 1. When the silicon oil is used, thread through thread guide for silicon 1 (Optional) 2. For thick thread, pass the thread through one hole only of needle bar thread guide 2 . 4. Installing and removing the bobbin case WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ) Open hook cover 1 . 2) Raise latch 3 of bobbin case 2 , and remove the bobbin case.

  • Page 18: 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. ) Set the bobbin 1 into bobbin case 2 in the di- 25mm rection shown in the figure. 2) Pass the thread through thread slit 3 of bobbin case 2 , and pull the thread as it is. By so doing, the thread will pass under the tension spring and be pulled out from thread hole 4 .

  • Page 19: Adjusting The Thread Take-Up Spring

    7. Adjusting the thread take-up spring The standard stroke of thread take-up spring 1 is 8 to 0 mm, and the pressure at the start is 0. to 0.3N. ) Adjusting the stroke Loosen setscrew 2 , and turn thread tension asm. Turning it clockwise will increase the moving amount and the thread drawing amount will in- crease.

  • Page 20: 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. Pattern No. of the item selection lights up, and the pattern No. is indicated on the data display. (2) Setting of the pattern No.
  • Page 21 (5) Setting of the max. sewing speed limitation ) Press the key to indicate the item “Speed” 2) Press key to indicate “400”. (Set- ting of 400 sti/min) (6) Setting the thread tension ) Press key to indicate the item “THREAD TENSION” 2) Press key to indicate “50”. (0 to 200 can be set.) (7) Finish of setting ) Press the key.

  • Page 22: Checking The Contour Of A Sewing Pattern

    2. Checking the contour of a sewing pattern WARNING : 1. Make sure without fail of the contour of the sewing pattern after selection of the sewing pattern. If the sewing pattern extends outside the work clamp feet, the needle will interfere with the work clamp feet during sewing, causing dangerous troubles including needle breakage. 2. When making sure of the contour of the sewing pattern, press + / - key with the needle bar lowered, and the work clamp feet move after automatically making the needle bar return to the upper posi- tion. ) Press key to make the READY LED light up. 2) Select the work clamp foot lowering with key. 3) Lower the work clamp feet with the foot switch. The sewing machine does not start even when the foot switch is de- pressed under this mode.

  • Page 23: Sewing

    3. Sewing ) 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 24: 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 ) Press key to make the SEWING LED go off. 2) Select the bobbin winder with key. Selection cannot be performed when the Sewing LED is lit up. 3) Press key.

  • Page 25: 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. Changeover of ON/OFF motion is performed with key.
  • Page 26 (3) When the type of lower plate 1 that material does not come in close contact with throat plate 2 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 27: Operation Of The Sewing Machine (Advanced)

    [6] OPERATION OF THE SEWING MACHINE (ADVANCED) 1. Performing sewing using the pattern keys ( and Patterns (No. to 200) which have been already registered can be registered to P to P50. It is possible to change and register the scale, max. speed limitation, thread tension and sewing position. Same as the patterns (No. to 200), P to P50 are used by the selection by scrolling the pattern Nos. The pattern call- ing from P to P25 can be made by one-touch as well.
  • Page 28 6) Press key and set as follows with key. X Scale rate : “50”%, Y Scale rate : “80” %, Max. speed limitation : “2000” sti/min, Thread tension : “50” 7) Press key and “X Scale rate ” indi- cation becomes 0.0. Traveling amount in X di- rection can be set in 0. mm unit.
  • Page 29 (2) Sewing operation Operation example : After performing sewing with the contents of the registered P2, perform sewing with the contents of P3. ) 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 30: Performing Sewing Using The Combination Function

    2. Performing sewing using the combination function By arranging in the order of use of the pattern register (P to P50) which have been already registered and registering in C to C20, the sewing pattern will change in the order every time the sewing machine finishes the sewing. Every one combination No. can be registered up to the maximum 30 patterns. (1) Register of the combination Setting example : Combine in the order of P, P2 and P3, and register them in the C.
  • Page 31 (2) Sewing operation Operation example : Perform sewing with the contents of the registered C. ) Turn ON the power switch. 2) Set the pattern No. to “C- ” using the key. Scroll as follows : / 0 to 200 ,/ P1 to P50 ,/ C1 to C20 , 3) Press the key. When the sewing LED lights up, the work clamp feet will go up after having moved.

  • Page 32: 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. The bobbin thread counter is of the subtracting method. The counter at the time of delivery is set to the production counter (adding method).

  • Page 33: 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. ) While the sewing LED lights up, press to indicate the needle thread tension 2) Lower the presser with the foot pedal.

  • Page 34: Cautions In Operation

    6 . Cautions in operation () When the error indicator lamp lights up, be sure to check the cause of trouble and take a proper cor- rective 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 35: 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. ) Turn the handwheel by hand. When needle bar Relation between needle and engraved lines 1 has gone up, adjust so that lower marker line 2 engraved on the needle bar aligns with the bottom end of the needle bar bushing 3 , lower. 2) Loosen setscrew 1 in the driver.

  • Page 36: 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. ) With the machine in stop mode, remove six set- screws 1 of the top cover, and take off top cover 2) Apply L-shaped wrench 3 to socket bolt 5 of clamp 4 , and loosen the socket bolt. 3) Push down L-shaped wrench 3 to increase the lift of the work clamp foot, or pull it up to de- crease the lift.

  • Page 37: 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. ) When thread is caught at top end 1 of the thread clamp, thread clamp becomes incomplete and sewing trouble at the sewing start will be caused. Remove it with tweezers or the like. 2) When removing thread waste or thread dust col- lected on the thread clamp device, remove it af- ter removing the throat plate.

  • Page 38: Draining Waste Oil

    7 . Draining waste oil When polyethylene oiler 1 becomes filled with oil, remove polyethylene oiler 1 and drain the oil. 8 . Amount of oil supplied to the hook ) Loosen setscrew 1 and remove setscrew 1 . 2) When screwing in adjustment screw 2 , the amount of oil of oil pipe, left 4 can be reduced. 3) After the adjustment, screw in setscrew 1 and fix it.

  • Page 39: 0. 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. It is adaptable to the voltage of single phase 00V to 20V/3-phase 200V to 240V by changing the voltage changeover connector mounted on FLT p.c.b. (Caution) When the changing procedure is wrong, the control box will be broken. So, be very careful.

  • Page 40: 1. Replenishing The Designated Places With Grease

    2) Remove setscrew 3 from the grease inlet cover located at periphery of crank rod 2 . 3) Fill coupling 4 with grease through JUKI Grease B tube 5 . 4) Sink screw 6 supplied with the unit into the cou- pling to add the grease.

  • Page 41: 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 ) When key is pressed in the state that the sewing LED is put out, the memory switch setting mode is obtained. 1.32 which is indicated when "M" key is Three figures from Two figures from the pressed indicates that the max. speed limitation...
  • Page 42 2) Press key in the state that memory switch No.  is indicated to make the sewing LED light up. The contents of memory switch No.  (max. sewing speed limitation value of the sewing machine) are indicated. 3) Set "800" with key.
  • Page 43 4) Indicate "000" 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 44 3) Press key. The sewing LED lights up and the set value of pattern No.  is indicated. Set value  : 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 45: 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 State when delivered Remarks Max.
  • Page 46 Indication Function Setting range State when delivered Remarks Counter operation 0 : P r o d u c t i o n c o u n t e r (adding)  : Bobbin thread counter (subtracting) Selection of pedal 0 : Standard pedal  : Standard pedal (2-step stroke) 2 : Optional pedal...
  • Page 47 Indication Function Setting range State when delivered Remarks State of work clamp foot when 0 : Work clamp foot goes up. machine stopped by temporary  : Work clamp foot goes stop command can be selected. u p w i t h w o r k c l a m p foot switch.

  • Page 48: Others

    [9] OTHERS 1. Setting the DIP switch When “4” of DIP switch 2 on SDC circuit board 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 49: 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 ＊...

  • Page 50: 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 (5) ※ ※ (Note3) ※ ※ ※ ※...
  • Page 51 Sewing Sewing (Note 2) (Note 2) size (mm) size (mm) Stitch diagram Stitch diagram No. of work No. of work clamp foot clamp foot Length- Cross- Length- Cross- wise wise wise wise ø2 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. 23 to 26. －...

  • Page 52: Table Of The Work Clamp Foot

    4. Table of the work clamp foot 358659 (asm.) 3548557 (asm.) 3542964 (asm.) Work clamp foot 4607 46404 46800 46305 46206 (With knurl) (With knurl) (With knurl) (Without knurl) (Without knurl) Feed plate 21.2 11.4 Sewingspecification H / W ※ Finger guard 353304 Standard ac- Supplied with F (foundation) Optional Standard acces- type machine head.
  • Page 53 35485(asm.) 354245 (asm.) 357955 (asm.) 356360 (asm.) Work clamp foot 3548003 3554803 46602 46503 46909 4670 (With knurl) (With knurl) (With knurl) (Without knurl) (Without knurl) (Without knurl) Feed plate 27.4 37.3 Sewing H / W specification ※ Finger 3548300 353304 3573407 guard...

  • Page 54: 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 ) Connect PK-57 change cable 2 with CN4 of MAIN circuit board 1 .

  • Page 55: E Rror List

    － －...
  • Page 56 － －...
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  • Page 58: Troubles And Corrective Measures (Sewing Conditions)

    8. Troubles and corrective measures (sewing conditions) Trouble Cause Corrective measures Page . The needle thread 1 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. mm. of bar-tacking. ™ Set soft-start sewing at the start of bartacking.
  • Page 59 Trouble Cause Corrective measures Page 6. The needle thread 1 The needle thread tension is not ™ Increase the needle thread tension. comes out on the high enough. wrong side of the 2 The tension release mechanism ™ Check whether or not the tension disc material.

  • Page 60: Table Of The Optional Parts

    9. Table of the optional parts Name of Parts Type Part No. Remarks Without knurl / processed 42009 Feed plate blank Sewing area lengthwise 20 X crosswise 40 With knurl / processed 420307 Sewing area lengthwise 20 X crosswise 40 Without knurl / stainless steel 420505 t = 0.5 Sewing area lengthwise 20 X crosswise 40...
  • Page 61 Name of Parts Type Part No. Remarks Finger guard (2) A=66.5 B=43 3573407 lengthwise bartacking Finger guard (3) A=2.5 B=35.5 420000 For specially ordered work clamp SM8040302TP With knurl / processed (right) 4002869 Work clamp foot blan With knurl / processed (left) 4002870 －...

  • Page 62: Explanation Of The Lk-1901An, Computer-Controlled High-Speed Eyelet Buttonhole Bartacking Machine

    @. EXPLANATION OF THE LK-1901AN, COMPUTER-CONTROLLED HIGH-SPEED EYELET BUTTONHOLE BARTACKING MACHINE 1. Specifications Different specifications from those of the LK-1900AN only are described. Max. sewing speed 3.000 sti/min Needle DPx5 #4, #6 Lift of the work clamp foot Max. 7mm Number of standard patterns 3 patterns 2. Installation of the sewing machine and preparation of the operation...

  • Page 63: 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 ) 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). (Graduation position : 2) 2) Loosen bolt 1 and move work clamp foot regulator 2 in the direction of arrow to adjust the material closing amount.

  • Page 64: Adjustment Of The Pressure Of The Work Clamp Unit

    5. Adjustment of the pressure of the work clamp unit WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ) The pressure of the work clamp unit should be minimized as long as the material does not warp during sewing. Loosen adjusting screw 1 and turn adjusting screw 2 to obtain the aforementioned pressure. 6. Setting of the material closing operation ) The material closing operation is performed by the electromagnetic solenoid, and change-over of the operation setting (effective / ineffective) is available.

  • Page 65: Selection And Confirmation Of The Sewing Patterns

    7 . Selection and confirmation of the sewing patterns WARNING : In case of using an exclusive work clamp foot, make sure of the shape of the sewing pattern. If the sewing pattern extends outside the work clamp foot, the needle interferes with the work clamp foot during sewing, resulting in the danger of the needle breakage or the like. 1) The patterns for eyelet buttonhole bartacking are from No. 11 to No. 13. 2) When the material closing operation is performed, the maximum sewing size is 3x7mm.

  • Page 66: Explanation Of The Lk-1902An, Computer-Controlled High-Speed Belt-Loop Attaching Machine

    #. EXPLANATION OF THE LK-1902AN, COMPUTER-CONTROLLED HIGH-SPEED BELT-LOOP ATTACHING MACHINE 1 . Specifications Different specifications from those of the LK-1900AN only are described. Max. sewing speed 3.000 sti/min Needle DPx5 #4, #6 Lift of the work clamp foot Max. 7mm Number of standard patterns 6 patterns 2 . Installation of the sewing machine and preparation of the operation DANGER :...

  • Page 67: Selection And Confirmation Of The Sewing Patterns

    4 . Selection and confirmation of the sewing patterns WARNING : In case of using an exclusive work clamp foot, make sure of the shape of the sewing pattern. If the sewing pattern extends outside the work clamp foot, the needle interferes with the work clamp foot during sewing, resulting in the danger of the needle breakage or the like. ) The patterns for the belt-loop attaching are from No. 7 to No. 22. “!.[5] As for the way of operation for setting, checking or changing the sewing pattern, refer to the item Operation of the sewing machine (basic)”...

  • Page 68: Explanation Of The Lk-1903An, Computer-Controlled High-Speed Lockstitch Button Sewing Machine

    $. EXPLANATION OF THE LK-1903AN, COMPUTER-CONTROLLED HIGH-SPEED LOCKSTITCH BUTTON SEWING MACHINE 1 . Specifications Different specifications from those of the LK-1900AN only are described. Max. sewing speed 2.700 sti/min Needle DPx17 #14 Lift of the work clamp foot Max. 13mm Number of standard patterns 50 patterns * The needle thread clamp device is set to prohibition (state of standard delivery) with memory switch No. 35. Refer to “!.[5]-6. Thread clamp device”...

  • Page 69: 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 of threads sewing size X sewing size Y shape of threads...

  • Page 70: Position Of The Button Clamp Jaw Lever

    (2) Selection of the sewing pattern and the sewing width ™ Selection of the sewing pattern is the same as that of the LK-1900AN. ™ When the distance between holes of the button used does not fit the standard sewing width of the sewing pattern No., adjust the sewing width by enlarging/reducing the sewing width. The way of enlarging/reducing is the same as that of the LK-1900AN. Refer to the table given below for the scale for enlargement/reduction in terms of the sewing width. ™ After changing the sewing pattern No. and the sewing width, make sure of the needle entry point. As for the way of confirmation, refer to the in " Checking the contour of a sewing pattern" p.19 !.[5]-2 the instruction manual for the LK-1900AN.

  • Page 71: 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. Also, if the pedal is depressed during the adjustment, the button clamp unit will go up or come down. So, be careful. ) Press key in the state that the swing LED goes off using the operation panel. 2) Press key. / 3) Press key. The button clamp unit goes to the origin position and goes up. 4) Adjust feed plate 1 so that needle hole guide 2 comes to the center of the recessed part of feed plate 1 .

  • Page 72: 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 1 , and move moving plate 2 back and forth in the direction of arrow to adjust. The lifting amount of the button clamp will be decreased when moving plate 2 is moved in the direction of A , and be increased when it is moved in the direction of B .

  • Page 73: 0. 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 1 retains the needle thread after thread trimming in between wiper 2 and the wiper spring. Correct properly the tension of wiper spring 1 so that the tension at that time becomes 0.2 to 0.3N (a little higher tension than that of the bobbin thread coming out of the bobbin case).

  • Page 74: 2. Model Classification According To The Button Size

    12. Model classification according to the button size Model LK-903AN-30 LK-903AN-302 Button size classification For small-sized buttons For medium-sized button Outside diameter of applicable buttons (mm) ø0 to ø20 ø0 to ø20 Length Sewing size (mm) 0 to 3.5 0 to 4.5 Width 0 to 3.5 0 to 4.5 Button clamp jaw lever Thickness (mm) 2.2 (2.7)

  • Page 75: 3. Attaching The Shank Botton (Optional)

    13. Attaching the shank botton (optional) (1) Specifications " Model Optional Needle TQx3 #4 Max. ø20 Shape of button Outside diameter Min. ø.5 Diameter of hole Position of hole 1.5 mm or more Shape of shank section R(mm) Minimum Maximum – As for the dimensions of the shape of shank section, reder to the above table for reference.
  • Page 76 (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 ) Loosen needle bar connection screw 1 and move the needle bar 2 up or down so that second engraved marker line A as counted from the bottom is aligned with the bottom end of needlebar bushing 3 when turning the hand pulley to bring the needle bar to its lowest position.
  • Page 77 (4) Adjusting the button clamp support WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Loosen setscrew 1 , and place the button to be used in between the button clamps. Then determine the longitudinal position of the button hole and the slot of button clamp base 4 by moving button clamp support, front 2 and rear 3 back and forth.
  • Page 78 (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. 1 , loosen setscrews 2 and 3 , 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 79: Drawing Of The Table

    2 Drawer stopper installing position One place on the rear side 9 Drilled hole 9, 20 spot face 17 deep 3 JUKI logotype !0 2- drilled hole 2, 10 deep on the rear side (Power switch installing 4 4- drilled hole 8...
  • Page 80 2 Drawer stopper installing position !0 Drilled hole 17 One place on the rear side !1 Drilled hole 28 3 JUKI logotype !2 2- drilled hole 2, 10 deep on the rear 4 Drilled hole 8 side (Power switch installing hole)

This manual is also suitable for:

Lk-1902anLk-1903anLk-1903an-305

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