JUKI LK-1910 Instruction Manual
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JUKI LK-1910 Instruction Manual

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LK-1910, LK-1920
INSTRUCTION MANUAL
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  • Page 1 LK-1910, LK-1920 INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    9. OTHERS..........55 4-4. Installing and removing the bobbin case ..16 4-5. Installing the bobbin ........16 9-1. LK-1910/-1920 data ROM.........55 4-6. Adjusting the thread tension ......16 9-2. Connection of the optional pedal ....55 4-7. Adjusting the thread take-up spring ....17 9-3.

  • Page 3: Specifications

    1. SPECIFICATIONS 1 Sewing area X (lateral) direction 100 mm Y (longitudinal) direction 60 mm 2 Max. sewing speed 2500 sti/min* (When sewing pitches are less than 3 mm.) 3 Stitch length 0.1 to 10.0 mm (adjustable in 0.1 mm step) Feed motion of work clamp Intermittent feed (2-shaft drive by stepping motor) foot...

  • Page 4: Configuration

    2. CONFIGURATION 2-1. Names of main unit ❸ ❾ ❷ ❶ ❹ ❺ ❻ ❼ ❽ ❶ Machine head Air regulator ❷ Needle thread breakage detecting plate (Only for the pneumatic type) ❸ Wiper switch ❹ Temporary stop switch ❺ Intermediate presser (LK-1920 only) ❻...

  • Page 5: Names And Explanation Of Switches On The Operation Panel

    2-2. Names and explanation of switches on the operation panel ❻ ❼ ❶ ❾ ❽ ❷ ❸ ❹ ❺ NAME FUNCTION NAME FUNCTION ❽ EDIT key ❶ LCD display Various data such as pattern This key is used to display the edit screen, to select the item No., shape, etc.

  • Page 6: Installation

    3. INSTALLATION DANGER : To prevent possible accidents caused by the fall of the sewing machine, perform the work by two persons or more when the machine is moved. 3-1. Installing the table ❺ ❻ ❼ ❾ ❶ ❹ Note) ❷...

  • Page 7: Installation Procedure Of The Electrical Box

    3-2. Installation procedure of the electrical box Secure electrical box mounting Screw asm. A plate ❶ on the table with screw Screw asm. A ❷ ① asms. A (at four locations). Screw Push electrical box mounting plate ❷ asm. A ②...

  • Page 8: Connecting The Power Source Cord

    3-3. Connecting the power source cord Voltage specifications at the time of delivery from the factory are indicated on the voltage indication seal. Connect the cord in accordance with the specifications. Power indication tag Never use under the wrong voltage and phase.

  • Page 9: How To Carry The Sewing Machine

    3-4. How to carry the sewing machine Hold section A when moving the sewing machine. In addition, do not hold motor portion B. The sewing machine weighs over 46 kg. Be sure to carry the sewing machine with two or more people without exceptions.

  • Page 10: Installing The Motor Cover

    3-6. Installing the motor cover Install motor cover ❶ to the sewing machine main unit using the screws set in the cover. ❶ 3-7. Pedal switch • 1 pedal for solenoid type • 3-step pedal for pneumatic type (optional) MAIN circuit board MAIN circuit board •...

  • Page 11: Tilting The Sewing Machine Head

    3-8. 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.

  • Page 12: Connecting The Cords

    3-10. Connecting the cords DANGER : 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 13: Handling The Cords

    3-11. Handling the cords DANGER : 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 14: Installing The Thread Stand

    3-13. Installing the thread stand Assemble the thread stand unit, and insert it in the hole in the machine table. Tighten locknut ❶ to fix the thread stand. For ceiling wiring, pass the power cord ❷ through spool rest rod ❷ . ❶...

  • Page 15: Attaching And Removing The Bolt For Transportation

    3-15. Attaching and removing the bolt for transportation (When transporting the (When using the sewing machine) sewing machine) When transporting the sewing machine, fix the sewing machine main unit and table with the bolt for transportation. When operating the sewing machine, remove the bolt. If the machine is operated with the bolt fixed, vibration of the machine head is transmitted to the table.

  • Page 16: Operation Of The Sewing Machine

    4. OPERATION OF THE SEWING MACHINE 4-1. Lubrication WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Once a day, fill oil from oil hole ❶ on the ma- chine head up to the red mark in the center of ❶...

  • Page 17: Attaching The Needle

    4-2. Attaching the needle WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Loosen setscrew ❶ and hold needle ❷ with the ❶ long groove ❸ facing toward you. Then fully insert it into the hole in the needle bar, and tighten set- screw ❶...

  • Page 18: Installing And Removing The Bobbin Case

    4-4. 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 ❶ . ❸ Raise latch ❸ of bobbin case ❷ , and remove the bobbin case.

  • Page 19: Adjusting The Thread Take-Up Spring

    4-7. Adjusting the thread take-up spring The standard stroke of thread take-up spring ❶ is 6 to 8 mm, and the pressure at the start is 0.3 to 0.5 N. ❶ Adjusting the stroke ❸ Loosen setscrew ❷ , and turn thread tension asm.
  • Page 20 (2) Adjusting the intermediate presser stroke to 0 mm Remove the top cover. Intermediate presser cam stopper Loosen two setscrews ❶ in the intermediate presser cam and slide the cam in the direction of B by 7 to 10 mm. Then, tighten setscrews ❶...

  • Page 21: Operation Of The Sewing Machine (Basic)

    5. OPERATION OF THE SEWING MACHINE (BASIC) Set each item following the procedure described below. 5-1. Model selection The model selection screen is displayed only when you turn ON the power to the sewing machine for the first time after replacing the old MAIN PCB with a new one due to a failure or any other problem of the old PCB.

  • Page 22: Setting The Pattern Number

    5-3. Setting the pattern number ❼ Turn ON the power switch. Pattern number is displayed at the upper left por- tion of the screen. In addition, the pattern shape, XY scale and sewing speed of the pattern are displayed on the remaining portion of the screen. ❼...
  • Page 23 (2) Inputting the Y size ❻ ❼ ❻ to display the Press ITEM SELECT key C002 Y size. ❼ to display the Press DATA CHANGE key value you desire. The setting exceeding 100% is danger- ous since needle and the cloth presser interferes with each other and needle breakage or the like will occur.
  • Page 24 On the comment input screen, as many as 14 ❻ ❼ characters can be input The characters that can be input are alphabets, numbers and symbols. ❻ to specify the Press ITEM SELECT key ❾ input position. Press DATA CHANGE key ❼...

  • Page 25: Checking The Contour Of A Sewing Pattern

    5-5. 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.

  • Page 26: Sewing

    5-6. Sewing Solenoid type Solenoid type Set a workpiece on the work clamp foot sec- tion. 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: Changing The Pattern To A Different One

    5-7. Changing the pattern to a different one ❼ ❷ to turn off SET Press READY key READY LED  . Set a pattern number with DATA CHANGE key ❼ . Set the XY enlargement/reduction scale and speed "5-4. Setting the item data" p.20.
  • Page 28 (2) For winding a bobbin only ❻ ❷ to turn off SET Press READY key READY LED  . Press work PRESSER and WINDER key ❺ and select lowering of the work clamp. Selection cannot be performed when the SET READY LED is lit up. ❻...

  • Page 29: Adjustment Of The Bobbin Thread Winder Components

    5-9. Adjustment of the bobbin thread winder components (1) Adjusting the bobbin winder thread tension Loosen nut ❶ , and adjust the height so Bobbin thread guide that the clearance between the bobbin Bobbin thread thread guide and the top cover should be Top cover 5 mm approximately 5 mm.

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

    6. OPERATION OF THE SEWING MACHINE (ADVANCED) 6-1. Performing sewing using the pattern keys User patterns (Nos. 1 to 200) and old user patterns (Nos. 1 to 99), which have already been registered, can be registered to P1 to P50. It is possible to change and register the scale and max. speed limita- tion.
  • Page 31 ❼ ❽ . Edit the item data Press EDIT key ❼ . with DATA CHANGE key The item data that can be edited are as "6-1.(2) Listing of item data" described in p.30 ❽ Set the X scale to "50" %, Y scale to "80" % and sewing speed to "2,000"...
  • Page 32 ❷ , key to finalize Press READY key the setting. ❹ . Press MODE key Pattern register mode is finalized. ❹ . Press MODE key Mode setting is finalized and the mode re- turns to the normal mode. ❷ ❹ (2) Listing of item data Item name Pictograph...
  • Page 33 (3) 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. Press direct pattern Press READY key to light up SET ⇩ READY LED . Once the LED lights up, the work clamp goes up after traveling.

  • Page 34: Sewing Using The Combination Function (Cycle Sewing)

    6-2. Sewing using the combination function (cycle sewing) This sewing machine can perform sewing of plural sewing pattern data in one cycle in the order of the data. As many as 99 patterns can be input. Use this function for sewing two or more different patterns on the sewing product.
  • Page 35 (2) Method of editing cycle data Set the mode to input mode ❻ ❼ Under the input mode where SET READY LED  goes out, entry of the cycle data is enabled. If the current mode is the sewing mode, press ❷...
  • Page 36 (3) Sewing operation ❻ ❼ Turn the power ON. Select the cycle pattern using ITEM SELECT ❻ . Select the cycle pattern number ❼ . with DATA CHANGE key ❷ to light up SET Press READY key READY LED  . Then, the work clamp goes up after travelling.

  • Page 37: Sewing Through The Use Of The Counter

    6-3. Sewing through the use of the counter (1) Setting procedure of the counter value ❻ Call counter setting screen ❹ , in the state Press MODE key where SET READY LED  goes out, to dis- play the mode screen. Place "02 Counter setting"...
  • Page 38 (2) Kind of counter ① Sewing UP counter Every time the sewing of one shape is performed, the existing value is counted up. When the existing value is equal to the set value, count-up screen is displayed. ② Sewing DOWN counter Every time the sewing of one shape is performed, the existing value is counted down.
  • Page 39 (4) How to check the counter in the ready state ❻ Under the sewing mode where SET READY LED  lights up, press ITEM SELECT key ❻ to display the counter screen. ❼ On the counter screen, the current value on the counter can be updated with DATA ❼...

  • Page 40: How To Use The Temporary Stop

    6-4. How to use the temporary stop The sewing machine can be stopped while it is engaged in sewing. The sewing machine is stopped by pressing pause switch ❶ . At this time, E050 is dis- played on the screen. ❶...

  • Page 41: Copying Or Deleting Various Kinds Of Pattern Data

    6-5. Copying or deleting various kinds of pattern data Data of pattern No. which has been already registered can be copied to pattern No. which has not been used. Overwriting copy of the pattern is prohibited. When you desire to overwrite, perform it after eras- ing the pattern once.
  • Page 42 Erasing the pattern ❻ to select the pattern number In the case of erasing the pattern, select ITEM SELECT key ❼ to select Trash you want to delete. Press DATA CHANGE key . Then, press READY ❷ . The delete confirmation screen is displayed. The pattern is deleted by pressing RE- ❸...

  • Page 43: Communication

    ・ When the storage space of a USB device is partitioned, only one partition is accessible. ・ Some type of the USB device may not be properly recognized by this sewing machine. ・ JUKI does not compensate for loss of data stored on the USB device caused by using it with this sewing machine.
  • Page 44 Extension Description of data Data on needle entry points created with the PM- VD00 ××× .VDT Vector form data 1. The data form is commonly used among JUKI (×××:001 to 999) sewing machine.(User pattern) ❻ ❼ Selecting the communication direction ❻...

  • Page 45: Cautions In Operation

    6-7. Cautions in operation (1) When threading and the sewing machine is switched ON, in case the thread tension disk is closed, sew the desired sewing pattern. After thread trimming, the thread tension disk will open. (2) When the error indicator lamp lights up, be sure to check the cause of trouble and take a Closed Opened...

  • Page 46: Setting Enable/Disable Of Standard Pattern Invoking

    6-8. Setting enable/disable of standard pattern invoking Invoking of a wrong pattern is prevented by disabling invoking of unnecessary patterns. In addition, necessary patterns can be invoked and used. Example of setting: Invoking of pattern No. 51 is disabled. Putting the sewing machine in the input mode Under the input mode where the SET READY LED  goes out, setting of data is enabled.

  • Page 47: Maintenance

    7. MAINTENANCE 7-1. 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. Upper ❹ ❸ ❷ engraved line ❶ A : Engraved line for DP ×...

  • Page 48: Adjusting The Needle-To-Shuttle Relation

    7-2. 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 nee- Relation between needle and engraved lines dle bar ❶...

  • Page 49: Adjusting The Lift Of The Work Clamp Foot

    7-3. 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. Solenoid type Solenoid type Loosen setscrews ❷...

  • Page 50: Adjusting The Rising Amount Of The Thread Tension Disk

    7-5. Adjusting the rising amount of the thread tension disk WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Remove the top cover. Make sure that ten- Widen sion release pin ❸...

  • Page 51: Draining Waste Oil

    7-7. Draining waste oil When polyethylene oiler ❶ becomes filled with oil, remove polyethylene oiler ❶ and drain the oil. ❶ 7-8. Replacing the fuse DANGER : 1. To avoid electrical shock hazards, turn OFF the power and open the control box cover after about five minutes have passed.

  • Page 52: How To Use The Memory Switch

    8. HOW TO USE THE MEMORY SWITCH 8-1. Method of changing memory switch data Set the mode to input mode Under the input mode where SET READY LED  goes out, change to the memory switch data is enabled. If the current mode is the sewing mode, press ❷...

  • Page 53: List Of The Memory Switch Functions

    8-2. List of the memory switch functions Various operations of the sewing machine can be set by programming the memory switch. The initial setting values at the time of shipment differ with models. State when Function Setting range Remarks delivered U001 Max.
  • Page 54 State when Function Setting range Remarks delivered U036 Feed timing is selected −1 to 8 Setting on excessive "–" side may cause needle When stitches are not well-tightened, set the value in breakage. Be careful "–" direction. when sewing heavy- weight material.
  • Page 55 State when Function Setting range Remarks delivered U051 Wiper control can be prohibited : Wiper output prohibited : Wiper output enabled Thread breakage detection selection U071 : Prohibited : Enabled U072 Number of invalid stitches at the start of sewing of 0 to 15 thread breakage detection U073...
  • Page 56 State when Function Setting range Remarks delivered U180 Type of work clamp selection for AMS : Standard : -12 mm offset (for the work clamp for AMS-206) Selection of basting stitch mode U185 Operation mode under which the needle enters the material only at inflection points : Without : With...

  • Page 57: Others

    9. OTHERS 9-1. LK-1910/-1920 data ROM The LK-1910/-1920 data ROM should be used by inserting it into the IC socket on the MAIN PCB. Carefully check the direction of insertion. ROMs that can be used 58C256 EEP-ROM JUKI part number : HL011940000 IC socket 9-2.
  • Page 58 (2) Connection of PK-57 ❷ ❹ ❼ ❶ ❻ ❺ ❺ ❸ J18 White J26 White Loosen the four setscrews ❷ in the control box to remove cover ❶ . Remove the standard pedal cord from J18 connector on the MAIN circuit board, and connect PK-57 change cable ❹...
  • Page 59 (3) Connection of 2-step PK pedal ❷ ❸ ❶ Loosen the four setscrews ❷ in the control box to remove cover ❶ . Remove the standard pedal cords from J18 and J26 connectors on the MAIN circuit board. Put the cord of PK 2-pedal unit in the elec- trical box and connect it to 2-pedal unit cord asm..

  • Page 60: Error List

    9-3. Error list Error Indication Description of error Corrective measure Remarks code E007 Machine lock error Turn OFF the power switch and The main shaft of the sewing machine does remove the cause of troubles. not rotate due to some troubles. E010 Pattern No.
  • Page 61 E063 Machine head identification error Turn the power OFF and con- The type of machine head and the type of tact JUKI or your distributor. control box do not match. Connection alert for the USB thumb E204 Re-operation is enabled after drive which is used for sewing resetting.
  • Page 62 Error Indication Description of error Corrective measure Remarks code E405 Prohibition of deletion of direct patterns Re-operation is enabled after The direct pattern is set in the cycle sewing resetting. data. E430 Counter set-value is reached Re-operation is enabled after The set value of the counter is reached.
  • Page 63 Error Indication Description of error Corrective measure Remarks code E915 Communication error between panel and Turn OFF the power switch and MAIN check whether CN34 of MAIN Communication between the panel and board is disconnected or loose. MAIN cannot be performed. Communication error between MAIN and E916 Turn OFF the power switch and...

  • Page 64: Troubles And Corrective Measures

    9-4. Troubles and corrective measures Trouble Cause Corrective measures Page ① Stitches are slipped at the start. ◦ Adjust the clearance between the needle 1. The needle thread slips and the shuttle to 0.05 to 0.1 mm. off at the start ◦...

  • Page 65: Table Of The Optional Parts

    9-5. Table of the optional parts Name of Parts Type Part No. Remarks Feed plate blank Without knurl / without processing 14224109 With knurl / without processing 14224000 t = 1.2 Needle hole guide A=1.6 B=2.6 Without relief slit D2426284M00 S type A=2.3 B=4.0 Without relief slit 14109607...

  • Page 66: Silicon Oil Tank

    Name of Parts Type Part No. Remarks Disk-raising device asm. 14224760 Needle cooler asm. 14225056 9-6. Silicon oil tank When synthetic fiber thread is used, fix silicon tank ❶ (B92118500A0) with setscrew ❷ . ❶ ❷ － －...

  • Page 67: Drawing Of The Table

    10. DRAWING OF THE TABLE － －...

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Lk-1920

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