JUKI LK-1900S Series Instruction Manual Download Page 18

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4-6. Adjusting the thread tension

❶

Short

Long

1) Set the bobbin

❶

into bobbin case

❷

in the di-

rection shown in the figure.

2) Pass the thread through thread slit

❸

of bobbin

case

❷

, 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

❹

3) Pass the thread through thread hole

❺

of the

horn section, and pull out the thread by 25mm
from the thread hole.

If the bobbin is installed in the bobbin
case orienting the reverse direction, the
bobbin thread pulling out will result in an
inconsistent state.

4-5. Installing the bobbin

❶

❷

❺

❹

❸

25mm

WARNING :

Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the

sewing machine.

❸

If thread tension controller No. 1

❶

is turned clock-

wise, the length of remaining thread on the needle
after thread trimming will be shorter. If it is turned
counterclockwise, the length will be longer.
Shorten the length to an extent that the thread is not
slipped off.

Adjust the needle thread tension with

❷

. Adjust the

bobbin thread tension with

❸

❷

Summary of Contents for LK-1900S Series

Page 1: ...1 INSTRUCTION MANUAL LK 1900S Series ...

Page 2: ...counter 34 6 4 How to use the temporary stop 37 6 5 Copying or deleting various kinds of pattern data 38 6 6 Communication 40 6 7 Cautions in operation 42 6 8 Setting enable disable of standard pattern invoking 43 6 9 How to use the F key 44 6 10 Production support function 45 7 MAINTENANCE 51 7 1 Adjusting the height of the needle bar 51 7 2 Adjusting the needle to shuttle relation 52 7 3 Adjusti...

Page 3: ... Pattern enlargement reduction can be done by increasing decreasing the stitch length 13 Max sewing speed limitation 400 to 2 700 sti min 100 sti min steps 14 Pattern selection Standard patterns 51 User patterns 1 to 200 Media patterns 1 to 999 15 Bobbin thread counter UP DOWN type 0 to 9999 16 Sewing machine motor Servo motor 17 Dimensions W 1 200 mm L 660 mm H 1 100 mm Use the standard table and...

Page 4: ... 2 2 CONFIGURATION 2 1 Names of main unit Machine head Work clamp feet Thread stand Operation panel Power switch Control box Pedal Power switch EU type ...

Page 5: ...performing bobbin winding ITEM SELECT key This key is used to select the data No and other kinds of data DATA CHANGE key This key is used to change the pattern No and other kinds of data This key is used to move the feed forward on a stitch by stitch basis No NAME FUNCTION EDIT key This key is used to display the edit screen to select the item or to display the detail screen RETURN key This key is...

Page 6: ...figure using four bolts four plain washers and four spring washers and four hexagonal nuts supplied with the unit Bolt is a cup head square neck bolt M8 Length 70 mm and nut is a hexagonal nut M8 Install the pedal sensor to the table with mounting screws supplied with the unit 3 2 Installing the pedal sensor ...

Page 7: ...Installing the head support rod A B 1 Fix connecting rod to installing hole B of ped al lever with nut 2 The pedal depressing stroke is decreased by fitting connecting rod in mounting hole A Drive head support rod in hole in the machine table ...

Page 8: ...rdance with the specifications Table Brown Brown Light blue Light blue Light blue Green Yellow Green Yellow Control box Green Yellow Plug Power source cord Power switch GND AC 220 V 240 V Connecting single phase 220V 230V and 240V Rating plate Power indication tag Brown 1 Installing the power switch Fix power switch under the machine table with wood screws Fix the cable with staples supplied with ...

Page 9: ... A with hands to support the side faces of the sewing machine 3 7 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 A 3 6 How to carry the sewing machine To carry the sewing machine it is necessary to hold A section and support the side faces of the sewing ma chine...

Page 10: ... oiler in waste oil reservoir 3 Insert sewing machine waste oil pipe into po ly oiler 4 Insert head support rubber into table 5 Pass bundle of cords through slotted hole in the table 1 Insert drain pipe until it will go no fur ther so that it does not come off drain bin when tilting the machine head 2 Remove the tape fixing drain pipe 3 8 Installing the drain receiver and the head support rubber D...

Page 11: ...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 Fix operation panel mounting plate on the table with four wood screws Then pass the cable through hole in the table In the case of...

Page 12: ... on position A of the control box with a screw Fig 2 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 c...

Page 13: ... machine head is tilted See A section 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 3 Ins...

Page 14: ... Installing the eye protection cover WARNING Be sure to attach this cover to protect the eyes from the disperse of needle breakage Pass LED cord through accessory cord clamp supplied with the unit as shown in the figure Fix the LED cord with screw located at the lower section of eye protection cover ...

Page 15: ...hten locknut to fix the thread stand 3 For ceiling wiring pass the power cord through spool rest rod 3 16 In the case the machine is transported after factory completed at the time of shipment Pass bed fixing bolt plain washer and nut through hole in the table and hole in the sewing machine bed to fix the bed on the table ...

Page 16: ...the sewing machine for the first time or after an extended pe riod of disuse use the machine after lubricating a small amount of oil to the hook portion Refer to I 7 2 Adjusting the needle to shuttle relation p 52 Loosen setscrew and hold needle with the long groove facing toward you Then fully insert it into the hole in the needle bar and tighten setscrew If the stitches are made as shown in A at...

Page 17: ...hreading through the needle If it is difficult to thread the machine head refer to I 5 8 How to open the tension disk p 24 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 WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the ...

Page 18: ... installed in the bobbin case orienting the reverse direction the bobbin thread pulling out will result in an inconsistent state 4 5 Installing the bobbin 25mm WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine If thread tension controller No 1 is turned clock wise the length of remaining thread on the needle after thread tri...

Page 19: ...ne 5 OPERATION OF THE SEWING MACHINE BASIC Set each item following the procedure described below 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 in crease 2 Adjusting the pressure To change...

Page 20: ...em data input screen is displayed The items that can be edited are displayed on the left section of the screen and the set contents are dis played on the right section of the screen Select an item with ITEM SELECT key Then change the set content with DATA CHANGE key 1 Inputting the X size Press ITEM SELECT key to display the C001 X size Press DATA CHANGE key to display the value you desire One of ...

Page 21: ...for the X Y sizes can be selected i e by inputting a percentage with memory switch U064 or by inputting an actual value Initial value Input in terms of percentage 3 Inputting the sewing speed Press ITEM SELECT key to display the C004 sewing speed Press DATA CHANGE key to display the value you desire The maximum input range is the maximum sewing speed of the memory switch U001 4 Setting the comment...

Page 22: ...n the presser since the presser moves after having lowered When READY key is pressed the set values of pattern No X Y scale etc are memorized When READY key is pressed SET READY LED goes out Setting of each item can be changed Check the pattern number before use If you press READY key with pattern number 0 dis played error display E010 will be shown on the screen At this time re set the pattern nu...

Page 23: ...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 Needle 10mm Clearance Clearance 1 Press READY key to light up the SET READY LED 2 Press wor...

Page 24: ...ATA CHANGE key Set the XY enlargement reduction scale and speed as with I 5 4 Checking the contour of a sewing pattern p 21 Press READY key to light up SET READY LED to enable sewing 1 Set a workpiece on the work clamp foot section 2 When you depress the pedal to the first step the work clamp comes down When you release the pedal the work clamp goes up 3 Depress the pedal switch to the second step...

Page 25: ...ding after setting pattern No or the like once pressing the READY key and making the SET READY LED light up 1 Press READY key to turn off SET READY LED 2 Press work PRESSER and WINDER key and select lowering of the work clamp 3 Press key The bobbin winding screen is displayed 4 When you depress the pedal the sewing ma chine starts rotating 5 Depress the pedal switch again or press RESET key to sto...

Page 26: ...en the tension disk 3 Press key Then the disk of tension disk opens for 30 seconds 4 The screen is returned to the previous screen by pressing RETURN key and PRESSER and WINDER key WARNING If the disk floating operation is excessively repeated an error can be caused When the Set Ready LED lights up the same operation can be carried out ...

Page 27: ...row sewing material or changing over the sewing material on the sewing machine the LED light should be dimmed or turned OFF The sewing machine is provided as standard with an LED light which illuminates the needle entry area Intensity adjustment and turn off of the light is carried out by pressing switch Every time the switch is pressed the light is adjusted in intensity in five steps and is turne...

Page 28: ...ss EDIT key to display the pattern registration mode 2 Press ITEM SELECT key to set the standard pattern to No 3 Press DATA CHANGE key to set P No to 2 When you press the READY key P2 is registered and the mode screen is displayed Press MODE key or RETURN key When the select key is held pressed for one second in the state where the standard pattern or user pattern is selected on the data input scr...

Page 29: ...min re spectively 5 The X enlargement reduction ratio display 0 0 is displayed by pressing EDIT key The amount of travel in X direction can be set in increments of 0 1 mm Change the set value to 0 5 with DATA CHANGE key 6 The Y enlargement reduction ratio display 0 0 is displayed by pressing EDIT key The amount of travel in Y direction can be set in increments of 0 1 mm Change the set value to 1 0...

Page 30: ... 28 7 Press READY key key to finalize the setting 8 Press MODE key Pattern register mode is finalized 9 Press MODE key Mode setting is finalized and the mode returns to the normal mode ...

Page 31: ...nput method percentage or actu al dimension can be selected by setting the memory switch U064 Initial value Input in percentage S006 Sewing speed 400 to 2700 The maximum input range de pends on the maximum sewing speed set with the memory switch U001 S007 X travel amount 20 to 20 S008 Y travel amount 20 to 10 S009 2 step stroke work clamp stroke height 50 to 90 Display hide of the stroke height ca...

Page 32: ... pattern change by one touch even when the SET READY LED is lighting up 7 Perform the above items 4 and 5 P1 to P25 can be specified by selecting the pattern Display the target pattern using DATA CHANGE key P1 to P25 which have not been registered are not indicated Press P1 to P25 key while the SET READY LED lights up and the presser comes down Be careful that your fingers are not caught in the pr...

Page 33: ... over and dis played in order Cycle data No and continuous stitching data No which have been registered after the last registered pattern No are displayed Here select the cycle data No which you desire to sew 3 Perform sewing When READY key is pressed in the state where the cycle data is selected SET READY LED lights up to show that the sewing is enabled Cycle data No 1 only has been registered at...

Page 34: ...ing RETURN key 3 Selecting the edit point When you press ITEM SELECT key the edit point is changed and the current point is displayed in reverse video When you move the edit point forward until the last point is reached additional indica tion pictograph is displayed When you press EDIT key while selecting the edit point the additional indication pictograph is displayed at the selected position to ...

Page 35: ...tep of the cycle to permit sewing in repetition When you want to return to the previous pattern after the completion of sewing or to skip the next pattern press DATA CHANGE key while SET READY LED lights up The pattern display changes and the work clamp travels to the sewing starting point Be aware that the contents of P1 to P50 used for C1 to C99 will be changed if you change the contents of P1 t...

Page 36: ...e produced per day Press ITEM SELECT key to display the current value C of the number of pieces to be produced per day in the reverse video The numeric value can also be edited using DATA CHANGE key 1 How to set the sewing counter 1 Calling the production counter screen Under the input mode where READY LED goes out press INFORMATION key to display the production counter screen A For this sewing ma...

Page 37: ...the set value to be counted until this value is reached by pressing DATA CHANGE key 1 How to set the bobbin thread counter Bobbin thread counter 3 Changing the current value of the bobbin thread counter Press ITEM SELECT key to display the current value F of the counter in reverse video In addition It is possible to edit the numeric value by DATA CHANGE key E F G G The count completion screen has ...

Page 38: ...alue the count complete screen is displayed Bobbin thread count down counter The current value displayed on the bobbin thread counter is decreased by one every time the sewing machine sews 10 stitches When the current value becomes 0 zero the count com plete screen is displayed Counter not used 2 Type of the bobbin thread counter 3 How to reset the counter after the counter completes counting 1 Wh...

Page 39: ...ped by pressing RE SET key When you press RESET key the error is reset and the thread trimming screen is displayed When press RESET key again the thread trimmer operates to trim the thread and the feed forward backward screen is displayed 2 Three operations can be carried out after the error is reset 1 Re starting of sewing with the start switch 2 Adjust the positioning with DATA CHANGE key Press ...

Page 40: ... key to change over the mode to the input mode 2 Displaying the mode screen Press MODE key to display the mode screen Put the pattern copy in the selected state with ITEM SELECT key Then press EDIT key 3 Call copy screen Press ITEM SELECT key to select the source pattern number for copying The type of pattern that can be selected is the standard pattern and user pattern Only the pattern numbers wh...

Page 41: ...rn select 06 Direct pattern copy on the mode screen In the case of copying the cycle pattern select 07 Cycle pattern copy on the mode screen Both the direct pattern and the cycle pattern can be copied in the similar procedure The pattern key and the cycle pattern can be copied in the similar procedure To create a new cycle pattern press ITEM SELECT key to select new creation To select a copied use...

Page 42: ...he IP panel until it will go no further Do not turn the power OFF while the data on the USB flash drive is being accessed USB specifications Conform to USB 1 1 standard Applicable devices 1 Storage devices such as USB memory USB hub FDD and card reader Not applicable devices CD drive DVD drive MO drive tape drive etc Format supported FD floppy disk FAT 12 Others USB memory etc FAT 12 FAT 16 FAT 32...

Page 43: ...ction selection Press DATA CHANGE key to select the communication direction Data shown on the operation panel is written on the USB thumb drive Data stored on the USB thumb drive is read into the operation panel 4 Selecting the number Press ITEM SELECT key to select file No B to be read Press DATA CHANGE key to select file No C to be written Press set READY key to write the data in file No C 1 Ent...

Page 44: ...s down and the wiper interferes with needle As a result there is a danger of needle breakage or the like Reference for the sewing speed to be applied To prevent the thread breakage due to the needle heat set the sewing speed referring to the above table in accordance with the sewing conditions Sewn product thread needle Head type Sewing speed 8 layered denim Cotton thread 50 DP 5 16 S Standard 2 7...

Page 45: ...he sewing machine in the input mode Under the input mode where the SET READY LED goes out setting of data is enabled Under the sewing mode press READY key to change over the mode to the input mode 2 Press MODE key to display the mode screen Set the standard pattern use disuse se lection in the use state with ITEM SELECT key Then press the select key 3 Press ITEM SELECT key to display pat tern No 2...

Page 46: ... you keep F key held pressed the F key setting screen A is displayed A B 1 Method of register 3 Select parameter Item B which can be registered to the key is displayed Press ITEM SELECT key to select the item to be registered The items that can be registered are direct pattern item data and memory switch 1 item 4 Start register When READY key is pressed registration starts and the screen returns t...

Page 47: ...d is calculated from the current time work hours from the start time to the end time of work hours and work breaks Operation of rate of the sewing machine Time during the sewing machine runs Working hours for the day Daily working hours is calculated from the current time work hours from the starting time to the closing time of work hours and work breaks 2 Displaying the production parameters Unde...

Page 48: ...set values are determined by pressing EDIT key Then the screen returns to the production parameter setting screen C D B E F G A When you press ITEM SELECT key the dominical year B Month C Day D Hour F Minute G are displayed in the reverse video Select the target item you want to change and display it in the reverse video Enter the set value using DATA CHANGE key Once the dominical year month and d...

Page 49: ... of work hours by pressing DATA CHANGE key 2 Setting the work hours 3 Setting the closing time of work hours Press ITEM SELECT key to display the closing hour D minute E of work hours in the reverse video Change the closing hour D minute E of work hours by pressing DATA CHANGE key 4 Determine the set values of work hours The set values are determined by pressing EDIT key Then the screen returns to...

Page 50: ...nt complete unit B for the production counter by pressing DATA CHANGE key 3 Setting the number of times of thread trimming for sewing one piece of product 3 Determining the count complete unit set value The set value is determined by pressing EDIT key Then the screen returns to the production parameter setting screen Set the number of times of thread trimming to be carried out until the production...

Page 51: ...ng the closing time of work break Press ITEM SELECT key to display the closing hour D minute E of work break in the reverse video Change the closing hour D minute E of work hours by pressing DATA CHANGE key 4 Determine the set values of work break The set values are determined by pressing EDIT key Then the screen returns to the produc tion parameter setting screen If there are other work breaks ca...

Page 52: ...rget number of pieces 3 Determining the setting of the display type of the target number of pieces When you press EDIT key the set value is determined and the screen is returned to the pro duction parameter setting screen Set the display type of the target number of pieces to be used for the production support function A B 2 Setting the display type of the target number of pieces Enter the display...

Page 53: ... bottom end of needle bar bushing lower After the adjustment make sure that there is no uneven torque When stitch skipping occurs in accordance with the sewing conditions adjust the height of the needle bar so as to lower it by 0 5 to 1 mm from the needle bar engraved line WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine 7 ...

Page 54: ...ided between the front end of the driver and the needle as the front end face of driver receives the needle to prevent the needle from being bent Then tighten setscrew of the driver 4 Loosen setscrew of the shuttle and adjust the longitudinal position of the shuttle To do this adjustment turn shuttle race adjusting shaft clockwise or counterclockwise to provide a 0 05 to 0 1 mm clearance between n...

Page 55: ...he wiper readjust the height of the wiper using setscrew in the wiper installing base 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 Max 17 mm 7 4 The moving knife and counter knife 1 Loosen adjusting screw so that a clearance ...

Page 56: ...e the standard of the distance between the wiper and the needle is 23 to 25 mm By adjusting the distance wide the work clamp foot can prevent stepping on needle thread when it comes down Especially when the thin needle is used adjust the distance wide to such an extent of 23 mm The position of the needle is when the sewing mechine has stopped after the sewing finished WARNING Turn OFF the power be...

Page 57: ...tate for approximately half a day at the position where is screwed in and returned by 2 turns If reducing is excessive worn out of the hook will result 7 8 Replacing the fuse The machine uses the following two fuses MAIN PWB For pulse motor power supply protection 5A time lag fuse SDC PWB For control power supply protection 2A fast blow type fuse DANGER 1 To avoid electrical shock hazards turn OFF...

Page 58: ... E220 is dis played every time the power is turned ON In addition when the sewing machine is used further for a certain period of time after the display of error No E220 the error No E221 is displayed and the sewing machine fails to operate since the error can not be released even when the RESET key is pressed When the error No E221 is displayed be sure to replenish the designated places below wit...

Page 59: ...in section with grease 1 Tilt the machine head and remove the grease cover 2 Remove setscrew in oscillator gear 3 Fill coupling with grease through JUKI Grease A tube 4 Sink screw supplied with the unit into the cou pling to add the grease 5 Securely tighten setscrew which has been re moved after replenishing with the grease 6 Install grease cover at the location where felt comes in contact with g...

Page 60: ... pears 3 Select memory switch data to change Press ITEM SELECT key and select the data item which you desire to change 8 1 Method of changing memory switch data 8 HOW TO USE THE MEMORY SWITCH 4 Change data There are one data item to change the numerical value and the other data item to select the pictograph in the memory switch data No such as is attached to the data item to change the numerical v...

Page 61: ...i min 400 to 2700 2700 U009 Changeover of tension releasing timing at the time of thread trimming 6 to 4 4 U016 Disk floating timing at the beginning of sewing 10 to 2 5 U019 Selection of pedal Standard pedal Standard pedal 2 step stroke Optional pedal Optional pedal 2 step stroke U020 Selection of start pedal Standard pedal Optional pedal U024 Optional pedal 1 operation OFF when depressing pedal ...

Page 62: ...e is completed U041 State of work clamp foot when machine stopped by temporary stop command can be selected Work clamp foot goes up Work clamp foot goes up with work clamp foot switch Lift of work clamp foot is prohibited U042 Needle bar stop position is set UP position Upper dead point Needle bar rotates in the reverse direc tion after the UP po sition stop and stops when upper dead point stop is...

Page 63: ...able disable of the count completion display for the sewing counter Count completion display is disabled Count completion display is enabled U080 Audio output setting All audio guidance ON Panel operation guidance only All audio guidance OFF U081 Selection of language for audio function English Chinese U239 Choice of language With this switch the language to be displayed on the panel is selected T...

Page 64: ... 17 0 10 21 Straight line bartacking 18 0 10 28 Straight line bartacking 19 0 25 28 Straight line bartacking 20 0 25 36 Straight line bartacking 21 0 25 41 Straight line bartacking 22 0 35 44 Straight line bartacking 23 20 4 0 28 Lengthwise bartacking 24 20 4 0 36 Lengthwise bartacking 25 20 4 0 42 Lengthwise bartacking 26 20 4 0 56 Lengthwise bartacking 27 20 0 18 Lengthwise straight line bartack...

Page 65: ...king Knit goods bartacking No Stitch diagram 42 28 36 56 64 21 28 36 14 21 28 2 0 2 0 2 5 3 0 2 0 2 5 2 0 2 5 3 0 3 0 2 5 2 5 2 5 2 0 2 0 2 0 16 10 16 24 10 16 10 16 24 24 6 6 6 8 8 8 Number of stitches Sewing size mm Length wise Cross wise Note 2 No of work clamp foot Number of stitches Sewing size mm Length wise Cross wise Note 2 No of work clamp foot Other side This side 6 7 6 7 6 7 Note3 9 11 ...

Page 66: ...bartacking Round bartacking Length wise Cross wise ø12 ø8 Lengthwise bartacking 29 39 45 58 75 42 91 99 148 164 41 42 43 44 45 46 47 48 49 50 7 7 6 6 10 10 3 2 10 12 10 12 7 7 24 8 52 63 24 31 48 48 90 28 28 48 31 32 33 34 35 36 37 38 39 40 No 20 25 25 30 30 30 2 5 2 5 2 5 2 5 2 5 2 5 No 12 12 12 12 12 12 15 13 13 13 13 14 14 6 7 5 16 Note 2 No of work clamp foot Number of stitches Stitch diagram ...

Page 67: ...acing the work clamp foot 13518659 asm 13548557 asm 13542964 asm Without knurl Without knurl 14116107 14116404 14116800 14116305 14116206 S F F H W M Standard ac cessory for S standard type machine head Optional Optional Optional 13533104 With knurl With knurl With knurl 29 25 29 21 2 11 4 25 20 21 27 10 22 40 32 8 40 32 3 5 1 4 5 3 4 40 33 4 17 5 17 5 14 5 14 5 5 4 4 8 27 20 4 6 ...

Page 68: ... 14137509 right 14137608 left Without knurl 14137707 F 14135305 14 4 9 4 Optional 13 40021871 right 40021872 left 40021873 S Optional 14 40021874 right 40021875 left 40021876 S Optional 15 40021877 right 40021878 left 40021879 S 13533104 Optional 16 40021880 right 40021881 left 40021882 S 30 16 6 50 4 33 23 5 60 13 6 9 28 41 14 23 12 29 45 ø 1 2 10 45 ø 1 0 14 45 ø 1 4 ø 1 2 4 ø 1 0 4 ø 1 4 4 30 2...

Page 69: ...hen closing it DANGER It is very important to carefully connect the cables to the correct connectors on the PWB Wrong connection poses a great risk 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 electr...

Page 70: ...fter resetting E016 External media capacity over Memory capacity of the USB thumb drive to write pattern data is not sufficient Re operation is enabled after resetting E017 Machine memory capacity over Memory capacity of the sewing machine to write pattern data is not sufficient Re operation is enabled after resetting E019 File size over The pattern data to be read from the USB thumb drive is too ...

Page 71: ... E220 Grease replenishing time information Information as to the time of replenishing the designated places with grease Refer to I 7 9 Replenishing the desig nated places with grease p 56 Replenish the designated places with grease and set memory switch No 245 to 0 with the RESET key Er ror can be released with the RESET key when immediate replenishing with grease cannot be performed during sewing...

Page 72: ... rotation of motor The motor is reversing Turn OFF the power switch and check whether coupling of the main motor is loose E811 Overvoltage error Power source voltage is beyond the speci fied value Check the power supply volt age E813 Low voltage error Power source voltage is short Check the power supply volt age E901 Motor driver trouble Error from the motor driver is detected Turn OFF the power s...

Page 73: ...board is disconnected or loose E916 Communication error between MAIN and SDC Communication between MAIN and SDC cannot be performed Turn OFF the power switch and check whether CN32 of MAIN board or CN15 of SDC board is disconnected or loose E918 MAIN board overheat Overheat of MAIN board Turn OFF the power switch and turn ON the power switch again after some time E943 MAIN memory write in trouble ...

Page 74: ...eletion of machine data is checked on the communication screen M528 Overwriting is performed OK Overwriting confirmation of users pattern M529 Overwriting is performed OK Overwriting confirmation of media M530 Overwriting is performed OK When overwrite is checked on the communication screen Panel pat tern data M531 Overwriting is performed OK When overwrite is checked on the communication screen M...

Page 75: ...nnot be performed since data ex ists Overwrite is disabled media M581 Registration is canceled Registration of a direct pattern M582 Copy is cancelled Exited from the pattern data screen without copying M583 Copy is cancelled Exited from the direct pattern screen without copying M584 Copy is cancelled Exited from the cycle pattern screen without copying ...

Page 76: ... groove of the shuttle race The needle thread tension is too high The tension of the thread take up spring is too high The synthetic fiber thread melts due to heat generat ed on the needle Take it out and remove the scratches using a fine whetstone or buff Buff or replace it Correct the position of the work clamp foot Take out the shuttle and remove the fibrous dust from the shuttle race Reduce th...

Page 77: ...Increase the tension of the thread tension controller No 1 Use the lower plate the hole of which is larger than the presser Change of the sewing pattern 16 16 7 Threads break at time of thread trimming The moving knife has been improperly position Correct the position of the moving knife 53 8 Uneven length of the needle thread The tension of thread take up spring is too low Increase the tension of...

Page 78: ...osswise 40 With knurl processed Sewing area lengthwise 30 X crosswise 40 With knurl without processing Sewing area lengthwise 30 X crosswise 40 With knurl Processed right Sewing area lengthwise 20 X crosswise 40 With knurl Processed Left Sewing area lengthwise 20 X crosswise 40 With knurl Processed right Sewing area lengthwise 30 X crosswise 40 With knurl Processed Left Sewing area lengthwise 30 X...

Page 79: ...ly ordered work clamp Name of Parts Finger guard 2 Finger guard 3 Type A 66 5 B 43 A 21 5 B 35 5 With knurl processed right With knurl processed left Part No 13573407 14120000 40021869 40021870 M90135900A0 24 22 14 14 36 7 7 Work clamp foot blank PK57 changing cable asm ...

Page 80: ...rk as the set is included in the ac cessories 3 The way of operation is the same as that of the LK 1900S Set of button tray base 2 2 Needle and thread Needle and thread will vary in accordance with the sewing conditions When using the needle and the thread select them referring to the left table Cotton thread and polyester spun thread are recommend ed Needle Needle thread 60 60 50 40 Bobbin thread...

Page 81: ... 6 6 8 8 10 10 6 6 8 8 10 10 6 6 8 8 10 10 Standard sewing size X mm 3 4 Standard sewing size Y mm 3 4 Pattern No 18 44 19 45 20 21 22 23 46 24 25 26 47 27 28 48 29 30 49 31 32 50 33 Stitch shape Number of threads thread 6 8 10 12 16 6 10 12 6 6 10 10 6 6 10 10 5 5 5 8 8 8 5 5 5 8 8 8 Standard sewing size X mm 3 4 0 3 4 3 0 Standard sewing size Y mm 0 3 4 3 4 2 5 The standard sewing sizes of X and...

Page 82: ...or the LK 1900S Table of XY scale in terms of the sewing width 3 1 Position of the button clamp jaw lever X Y mm 71 76 82 88 94 100 106 118 126 132 138 153 165 176 182 188 2 4 2 6 2 8 3 0 3 2 3 4 3 6 4 0 4 3 4 5 4 7 5 2 5 6 6 0 6 2 6 4 WARNING When change of the shape of button change of the sewing pattern or enlargement reduction of the sewing width is performed make sure the needle entry point I...

Page 83: ... recessed part of feed plate 4 Place a button in button clamp jaw levers 5 Depress the pedal to the first step and detach your foot from the pedal when the button clamp unit comes down 6 Turn the hand pulley and check that the center of the needle enters the center of the button 7 If the center of the needle is not located in the cen ter of the button loosen screws in the button clamp jaw lever ba...

Page 84: ...arting the work so as to prevent accidents caused by abrupt start of the sewing machine 0 5 to 1mm 3 4 Adjusting the lifting amount of the button clamp Max 13mm A B WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine Loosen two setscrews and move moving plate back and forth in the direction of arrow to adjust The lifting amoun...

Page 85: ...ex cessive the thread may protrude from the upper side of the button WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine 3 5 Adjustment of the pressure of the work clamp unit The pressure of the work clamp unit should be minimized as long as the material does not warp during sewing Loosen adjusting screw and turn adjusting scr...

Page 86: ...pt start of the sewing machine LK 1903S 302 For medium sized button ø10 to ø20 0 to 4 5 0 to 4 5 2 7 2 2 MAZ156070B0 C MAZ155070B0 B MAZ156080B0 C MAZ155080B0 B MAZ15601000 MAZ15602000 4 2 Model classification according to the button size Model Button size classification Outside diameter of applicable buttons mm Needle hole guide Feed plate LK 1903S 301 For small sized buttons ø10 to ø20 0 to 3 5 ...

Page 87: ...pe of shank sec tion t ℓ t ℓ mm Minimum Maximum 1 4 9 3 3 8 5 7 As for the dimensions of the shape of shank section refer to the above table for reference Sewing speed Max speed of the pattern data is limited to 2 700 sti min However set it to 1 500 sti min for the shank button Stitch shape Sewing pattern program No 18 to No 22 Refer to Sewing program list of II 2 3 Various sewing modes p 79 ...

Page 88: ...djusting the feed plate base Center WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine Adjust so that the slot of feed plate becomes the center of the boss section of the needle hole guide and tighten se...

Page 89: ... a sewing pattern p 21 6 Adjusting the button clamp base and the feed plate X 0 5mm 1 As for the attaching height of button clamp base adjust the vertical position so that the bottom face of the button clamp base and the top face knurl face of feed plate A can equally press the material Then tighten setscrew 2 Adjust the position X protrusion of the material position of feed plate A against button...

Page 90: ...to make early the opening of the button support rubber when button clamp attaching base goes up Move it in the direction B to retard the opening of the button support rubber The standard adjustment is to adjust so that the button support rubber starts opening when button clamp attaching base has gone up by 1 mm A B Long slit WARNING Turn OFF the power before starting the work so as to prevent acci...

Page 91: ...Drilled hole 8 4 drilled hole 9 26 spot face 1 deep 3 drilled hole 3 10 deep on the rear side power switch installing hole Drilled hole 17 Drilled hole 28 R2 all corners Right side 6 drilled hole 3 10 deep on the rear side drawer installing hole Z Z 42 500 570 199 1130 1200 411 50 50 133 5 418 5 110 283 270 40 Z Z 1 2 Ø36 Ø16 135 120 6 35 263 5 120 390 488 503 85 40 256 1046 85 25 30 5 R 3 0 R 3 0...

Page 92: ...hole 3 drilled hole 7 6 deep Drilled hole 8 4 drilled hole 9 26 spot face 7 deep 3 drilled hole 3 10 deep on the rear side power switch installing hole Drilled hole 17 Drilled hole 28 R2 all corners Right side 4 drilled hole 8 583 2 500 207 6 42 804 547 65 35 297 637 5 R 10 4 R 38 151 136 8 584 9 124 181 257 1 10 5 135 20 0 5 18 78 1200 1130 113 5 259 8 48 7 1 18 5 0 5 263 5 120 16 36 65 66 8 155 ...

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Summary of Contents for LK-1900S Series

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JUKI LK-1900S Series, Instruction Manual

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Summary of Contents for LK-1900S Series

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