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JUKI LK-1900BN, Instruction Manual

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JUKI LK-1900BN Instruction Manual Download Page 20

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 17 

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4-7. Adjusting the thread take-up spring

❶

❹

❸

❷

4-8. Example of the thread tension

When using the sewing machine for the first time, adjust the thread tension referring to the table below.

Thread

Polyester filament thread #50

Polyester spun thread #50
Polyester spun thread #60
(Thread clamp OFF)
Cotton thread #50
Cotton thread #20

Material

Wool 
Wool

T/C broad

Denim
Denim 

Needle thread tension 

setting

30 to 35
50 to 55
30 to 35

35 to 45
35 to 45

Thread take-up spring moving 
amount [Thread drawing amount]

10mm [13mm]

10mm  [13mm]

8 to 10mm [11 to 13mm]

10mm [13mm]

8 to 10mm [11 to 13mm]

Strength

0.1N
0.2N
0.1N

0.1N
0.1N

5-1. Selection of language

When you turn ON the power to the sewing machine 

for the first time after the purchase, the language 

selection screen is displayed. Select the language to 
be displayed, then press RETURN key 

 

❾

  .

The language to be displayed on the screen can 
be changed by means of the memory switch U239 
"Language selection". Refer to 

"I.8. HOW TO USE 

THE MEMORY SWITCH" p.56

 for the details of 

the memory switch.

If you terminate the language selection by 
pressing RETURN key 

 

❾

 without se-

lecting the language, the language selection 
screen will be displayed every time you turn 
ON the power to the sewing machine.

5. OPERATION OF THE SEWING MACHINE (BASIC)

  Set each item following the procedure described below.

❾

The standard stroke of thread take-up spring 

❶

 is 8 

to 10 mm, and the pressure at the start is 0.1 to 0.3N.
1)  Adjusting the stroke 
  Loosen setscrew 

❷

, and turn thread tension 

asm. 

❸

.

  Turning it clockwise will increase the moving 

amount and the thread drawing amount will in-
crease.

2)  Adjusting the pressure
  To change the pressure of the thread take-up 

spring, insert a thin screwdriver into the slot of 
thread tension post 

❹

 while screw 

❷

 is tightened, 

and turn it. Turning it clockwise will increase the 
pressure of the thread take-up spring. Turning it 
counterclockwise will decrease the pressure.

Summary of Contents for LK-1900BN

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

Page 2: ...using the pattern keys 27 6 2 Sewing using the combination function cycle sewing 32 6 3 Sewing through the use of the counter 35 6 4 How to use the temporary stop 38 6 5 Setting the pattern thread tension 39 6 6 Copying or deleting various kinds of pattern data 40 6 7 Communication 42 6 8 Cautions in operation 45 6 9 Setting enable disable of standard pattern invoking 46 6 10 Setting the irregular...

Page 3: ...WING MACHINE WITH THE BIRD S NEST PREVENTING AND SHORTER THREAD REMAINING TYPE THREAD TRIMMER 95 1 SPECIFICATIONS 95 2 PREPARATION OF THE SEWING MACHINE 95 2 1 Installation of the sewing machine and preparation of the operation 95 2 2 Installing the regulator and solenoid valve asm 96 2 3 Connecting the air piping 96 2 4 Connecting the cords 99 2 5 Installing the air hose 100 2 6 Installing the cl...

Page 4: ...g speed limitation 400 to 3 200 sti min 100 sti min steps 14 Pattern selection Standard patterns 51 User patterns 1 200 Media patterns 1 999 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 stand 18 Mass Machine head 42 kg Control box 5 1 kg 19 Power consumption 250 VA Pattern No 1 3 200 sti ...

Page 5: ... 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 6: ...r 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 used to return the screen to the previous one DIRECT PATTERN This key registers the pattern When this key is pressed the pattern registered here can sew immediately X Y s...

Page 7: ...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 8: ...Installing the head support rod A B 1 Fix connecting rod to installing hole B of pedal 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 9: ...een Yellow Plug Power source cord Power switch GND AC 200 V 240 V AC 200 V 240 V Connecting single phase 200V 220V 230V and 240V Table Red Black Green Yellow White Control box Power source cord Plug Power switch GND Connecting three phase 200V 220V 230V and 240V Green Yellow Red White Black Green Yellow Red White Black Rating plate Power indication tag For example In the case of 200V Brown 1 Insta...

Page 10: ... 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 11: ... 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 12: ...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 13: ...C PWB Fig 1 3 Fix the ground wire 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 dealer...

Page 14: ... 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 15: ... 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 16: ...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 17: ...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 50 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 18: ...sed thread through thread guide for silicon Optional 2 For thick thread pass the thread through one hole only of needle bar thread guide 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...

Page 19: ... power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine 1 Press THREAD TENSION key to dis play the thread tension input screen 2 Set a needle thread tension with DATA CHANGE key The setting range is 0 to 200 In creasing the value increases the thread tension The sewing machine with standard specifications has been factory set at 50 the tension 1 5 N ...

Page 20: ...yed on the screen can be changed by means of the memory switch U239 Language selection Refer to I 8 HOW TO USE THE MEMORY SWITCH p 56 for the details of the memory switch If you terminate the language selection by pressing RETURN key without se lecting the language the language selection screen will be displayed every time you turn ON the power to the sewing machine 5 OPERATION OF THE SEWING MACHI...

Page 21: ...tting the item data When you press EDIT key the item 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 ...

Page 22: ...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 23: ...LED lights up after the work clamp has gone up to enable sewing When the presser is raised be careful that fingers are not caught in 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 The thread tension can be changed even whe...

Page 24: ...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 25: ...er with DATA CHANGE key Set the XY enlargement reduction scale and speed as with I 5 3 Setting the item data p 18 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 after des...

Page 26: ...ter 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 stop the s...

Page 27: ... end of needle thread held by the needle thread clamp may be rolled in the seams 1 3 33 to 36mm 10mm Right side Wrong side Needle thread 1 In case of with the needle thread clamp the standard of the length of needle thread is 33 to 36 mm 2 When needle thread is long after replacing thread or the like or sewing while holding needle thread by hand turn OFF the THREAD CLAMP key 3 When the needle thre...

Page 28: ...n thread becomes less conspicuous Example of setting Tension of 1 to 2 stiitches at the sewing start is 20 when sewing tension setting is 35 For the setting of tension at the sewing start refer to I 6 5 Setting the pattern thread tension p 39 Needle thread Wrong side 4 For LK 1903BN button sewing the thread clamp is set to the motion prohibited in the state of standard delivery due to the aforemen...

Page 29: ...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 30: ...ect pattern regist Press 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...

Page 31: ...ress thread tension key to display S005 and set the thread tension 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...

Page 32: ... 29 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 33: ... the memory switch U064 Initial value Input in percentage S005 Thread tension 0 to 200 Directly specify the thread tension with the THREAD TENSION key The thread tension cannot be selected with key S006 Sewing speed 400 to 3200 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 ...

Page 34: ... 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 35: ... mode press READY key to change over the mode to the input mode Only under the input mode selection of the cycle data is enabled 2 Select cycle stitching data Press ITEM SELECT key and pat terns which have been registered are changed over and displayed in order Cycle data No and continuous stitching data No which have been registered after the last registered pattern No are displayed Here select t...

Page 36: ...nd it is possible to select In addition press RESET key and the pattern data of editing point can be deleted When RESET key is held pressed for one second all the registered pattern data can be delet ed Repeat steps 3 and 4 to perform editing data 5 Cancelling insertion of pattern data Insertion of the pattern data is cancelled and the mode is changed over to the input mode by pressing RETURN key ...

Page 37: ...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 38: ...EM SELECT key to display the set value C of the counter in reverse video Press DATA CHANGE key and input the set value until count up is reached 4 Change of existing counter value Press ITEM SELECT key to display the current value D of the counter in reverse video Press RESET key and the value on the way of counting can be cleared In addition it is possible to edit the numerical value with DATA CH...

Page 39: ...subtracted by one every time the cycle sewing is carried out When the existing value is reached to 0 count up screen is displayed Bobbin thread count up counter The current value on the counter is increased by one every time 10 stitches are sewn When the current value equals to the set value the count complete screen is displayed Bobbin thread count down counter The current value on the counter is...

Page 40: ...isplay the counter screen 2 On the counter screen the current value on the counter can be updated with DATA CHANGE key The current value on the counter can be cleared with RESET key In the case the panel reset key is so set with the memory switch U031 as to function as the pause switch the pause function is disabled on this screen ...

Page 41: ...g machine is stopped by pressing RESET key At this time E050 is displayed The error is reset by pressing RESET key Then 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 Thread trimming by pressing RESET key position adjustment with DATA CHANGE key then re starting of sewing with the start sw...

Page 42: ...T READY LED 2 Turn ON work PRESSER and WINDER key to display the shape check screen 3 Move the work clamp with DATA CHANGE key When the point at which the thread tension can be set is reached the thread tension pictograph is displayed 4 Press the THREAD TENSION key Input the individual thread tension with DATA CHANGE key Then press the RE TURN key 5 Repeat the steps 3 and 4 to set thread tension 6...

Page 43: ... 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 44: ...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 45: ...e 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 46: ...direction 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...

Page 47: ...n between the sewing machine and a tablet or smart phone bring the antenna of the tablet or smartphone near to NFC mark as shown in Fig 2 If the NFC communication has failed error mes sage will be displayed on the tablet smartphone screen When the error message is displayed on the screen carry out the NFC communication again Precautions to be taken when handling NFC The position of the NFC antenna...

Page 48: ...prevent the thread breakage due to the needle heat set the sewing speed referring to the above table in accordance with the sewing conditions For sewing the foundation or the like lower the height of the needle bar to prevent the stitch skipping Refer to the item I 7 1 Adjusting the height of the needle bar p 49 Sewn product thread needle Head type Sewing speed 8 layered denim Cotton thread 50 DPx...

Page 49: ...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 50: ... time the work descriptions for that period can be input through the operation panel The data on the input work description can be collected and displayed by means of JUKI Smart App Setting of irregular work should be carried by means of JUKI Smart App The set details can be checked on the operation panel 1 Keep MODE key held pressed for three seconds Then select 14 Setting the irreg ular work wit...

Page 51: ...irregular work input screen are displayed Carry out setting of work items by means of JUKI Smart App 2 Work items can be checked by pressing ITEM SE LECT key Press RETURN key to display the ir regular work setting screen The work items are as listed below No Work items No Work items 01 Condition maintenance 08 Work meeting 02 Product arrangement 09 Transport 03 Thread change 10 Transfer 04 Record ...

Page 52: ...the needle bar to the position where it is lowered by 0 8 to 1 mm from the center of upper marker line engraved on the needle bar 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 st...

Page 53: ...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 54: ...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 55: ...amp 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 before starting the work so as to prevent accidents caused by abrupt start of the sewing machine When thread is caught at t...

Page 56: ... screwed in and returned by 2 turns If reducing is excessive worn out of the hook will result When polyethylene oiler becomes filled with oil remove polyethylene oiler and drain the oil 7 7 Draining waste oil 7 9 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...

Page 57: ...o 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 wi...

Page 58: ...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 59: ... 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 60: ...st stitch With needle thread clamp 0 to 200 200 U008 Thread tension at the time of thread trimming 0 to 200 0 U009 Changeover timing of thread tension at the time of thread trimming 6 to 4 0 U010 Sewing speed of 1st stitch Without needle thread clamp Speed can be set in a unit of 100 sti min 400 to 1500 400 U011 Sewing speed of 2nd stitch Without needle thread clamp Speed can be set in a unit of 1...

Page 61: ...anel is protected For LK 1903BN set to U036 Feed timing is selected When stitches are not well tightened set the value in direction 8 to 16 12 Setting on exces sive side may cause needle break a g e B e c a r e f u l when sewing heavy weight material U037 State of work clamp foot after completion of sewing can be selected Work clamp foot goes up after moving at the sewing start Work clamp foot goe...

Page 62: ... L K 1901BN this func tion is not indicat ed U051 Wiper operation method can be selected Without wiper at the time of thread trimming on the way With wiper at the time of thread trimming on the way With wiper at the time of thread trimming on the way Magnet wiper Without return of the last wiper With return of the last wiper U055 Effective ineffective of tie stitching for button sewing can be sele...

Page 63: ...r the LK 1900BBN LK 1903BBN 110 to 1000 ms 110 U088 Number of stitches for releasing thread waste Time lapse i e the number of stitches to be sewn from trimming of thread at the beginning of sewing to releasing of thread This memory switch is displayed only for the LK 1900BBN LK 1903BBN 0 to 100 stitches LK 1900BBN 5 LK 1903BBN 0 U089 Bird s nest suction time Time during which the thread tangling ...

Page 64: ...ing 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 bart...

Page 65: ...rtacking Small size bartacking 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 si...

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: ...42964 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 Supplied with F foundation type machine head Depends on the destination Optional Standard acces sory for M knit goods type ma chine head 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 ...

Page 68: ... 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 28 With knurl With knurl With knurl With knu...

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: ...thumb drive cannot be formatted Re operation is enabled after 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...

Page 71: ...d and the type of control box do not match Turn the power OFF and contact JUKI or your distribu tor E204 Connection alert for the USB thumb drive which is used for sewing Sewing has been carried out by 10 or more times with the USB thumb drive in serted in the USB port Re operation is enabled after resetting E220 Grease replenishing time information Information as to the time of replenishing the d...

Page 72: ...r fallen off E398 Shorter thread remaining type thread trimmer cylinder sensor error The shorter thread remaining type thread trimmer cylinder sensor fails to detect Turn OFF the power switch Check whether the air pres sure is adequate and wheth er the shorter thread remain ing thread trimming cylinder sensor and MAIN PCB CN53 have loosened or fallen off E399 Suction nozzle cylinder sensor error T...

Page 73: ...s disconnected or loose E908 Y origin retrieval error Y origin sensor does not change Turn OFF the power switch and check whether CN63 of INT board or CN43 of MAIN board is disconnected or loose E910 Work clamp foot origin retrieval error Work clamp foot origin sensor does not change Turn OFF the power switch and check whether CN71 of INT board or CN44 of MAIN board is disconnected or loose E913 N...

Page 74: ... Turn OFF the power E932 Y motor overload error The load applied to the Y feed motor is excessive Turn OFF the power E934 Thread clamp motor overload error The load applied to the thread clamp mo tor is excessive Turn OFF the power E943 MAIN memory write in trouble Memory write in of MAIN board cannot be performed Turn OFF the power switch and check the insertion of ROM of U022 of MAIN board E946 ...

Page 75: ...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 76: ...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 77: ...e has scratches The needle strikes the work clamp foot Fibrous dust is in the 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 Tak...

Page 78: ...s larger than the presser 16 16 7 Threads break at time of thread trimming The moving knife has been improperly position Correct the position of the moving knife 51 8 The thread clamp is entangled with needle thread The needle thread at the sewing start is too long Tighten thread tension controller No 1 and make the length of needle thread 33 to 36 mm 9 Uneven length of the needle thread The tensi...

Page 79: ...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 80: ...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 81: ...e MAIN board inside the control box 2 INSTALLATION OF THE SEWING MACHINE AND PREPARATION OF THE OPERATION DANGER Be sure to perform the work with two persons or more when moving the sewing machine 1 Max sewing speed 3 000 sti min 2 Needle DPx5 14 16 3 Lift of the work clamp foot Max 17mm 4 Number of standard patterns 3 patterns II EXPLANATION OF THE LK 1901BN COMPUTER CONTROLLED HIGH SPEED EYELET ...

Page 82: ...that the feed plate window does not interfere with the work clamp foot 3 1 Adjustment of the material closing amount Graduation C C A B 3 2 Adjustment of the lift of the work clamp foot Loosen two setscrews and adjust by moving work clamp foot lifting plate back and forth in the direc tion of arrow The amount of the lift of the work clamp foot will be decreased when work clamp lifting plate is mov...

Page 83: ...way of operation refer to item I 8 HOW TO USE THE MEMORY SWITCH p 56 described in the in struction manual for the LK 1900BN List of memory switch functions Setting range The material closing simultaneously works when the work clamp foot comes down Setting range The material closing simultaneously works with the sewing after the work clamp foot has come down As for the contents of memory switch fun...

Page 84: ...escribed in the instruction material for the LK 1900BN After setting check the needle entry point whether or not the needle interferes with the work clamp foot Sewing size is the dimension when the enlargement rate is 100 11 12 13 Crosswise 6 6 6 21 28 36 Lengthwise 2 5 2 5 2 5 Pattern No Number of stitches WARNING In case of using an exclusive work clamp foot make sure of the shape of the sewing ...

Page 85: ...needle For a thick thread pass the thread through only one of the two holes in nee dle bar thread guide WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine 1 Max sewing speed 3 000 sti min 2 Needle DPx5 14 16 3 Lift of the work clamp foot Max 17mm 4 Number of standard patterns 6 patterns 2 PREPARATION OF THE SEWING MACHINE Dif...

Page 86: ...of the appropriate combination of the work clamp foot and the feed plate in accordance with the sew ing conditions The combination for the standard delivery and the special order is shown in the following table Work clamp foot Spec LK 1902B Standard For large size Special order part For extra large size Special order part Feed plate Part No 13544465 Part No 14143002 Part No 13545660 Part No 135455...

Page 87: ...s the same as that of the LK 1900B 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 80 60 60 60 DPx17 14 DANGER Be sure to perform the work with two pers...

Page 88: ... 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 89: ...or the LK 1900BN 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 ...

Page 90: ... 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 91: ...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 92: ...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 93: ...t start of the sewing machine LK 1903BN 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 1903BN 301 For small sized buttons ø10 to ø20 0 to 3 5...

Page 94: ...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 IV 2 3 Various sewing modes p 85 ...

Page 95: ...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 96: ... 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 97: ...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 98: ...the LK 1900BN Refer to the instruction manual for the LK 1900BN 2 Install a set of the button tray base to a conve nient place for the work as the set is included in the accessories 3 The way of operation is the same as that of the LK 1900BN Set of button tray base DANGER Be sure to perform the work with two persons or more when moving the sewing machine 1 Max sewing speed 2 700 sti min 2 Thread P...

Page 99: ... asm near cord through hole see the figure in and regulator asm on the far left section of the undersurface of the table as observed from the worker 2 3 Connecting the air piping 1 Connecting the suction pipe 1 Pass the suction tube and air tube through hole in the table from undersurface WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the s...

Page 100: ...od In addition operate the sewing machine to check whether shorter remaining thread suction pipe moves smoothly without a hitch If the pipe fails to move smoothly re check how it is fixed 4 Connect bird s nest suction pipe and suction tube asm Secure two suction tube asms and four air tubes and two sensor cords coming from the sewing machine head together on the bed with cord clamp large 5 Bundle ...

Page 101: ...alve 2 Connecting the regulator and solenoid valve asm Connect coupling of the regulator and that of the solenoid valve asm with air tube asm Connect coupling of the regulator and solenoid valve with air tube ø8 3 Connecting the air tubes Connect the air tubes coming from the sewing machine head to the solenoid valves matching the marked number on the tube with the valve number ...

Page 102: ...ed by unaccustomed work or electric shock request the electric expert or engineer of our dealers when adjusting the electrical components Black Red Black Yellow Yellow 4P 3P 2P 4P CN46 CN53 CN52 CN54 4P CN51 VL1 VL3 2P 2P CN146 CN52 Black CN54 Red CN53 Yellow CN46 Black CN51 Yellow Suction solenoid valve Suction solenoid valve for shorter thread remaining type thread trimmer Solenoid valve for sho...

Page 103: ...ressure at 0 5 MPa Push down the knob to its home position to fix it Adjusting the pressure sensor The pressure sensor has been factory set so that it detects when the air pressure drops below 0 3 MPa at the time of shipment Do not change the setting of the pressure sensor Install the finger guard right while carefully preventing the air tubes to be caught under the guard to allow the shorter rema...

Page 104: ... following list Sewing program list The standard sewing sizes of X and Y are when the enlargement reduction rate is 100 Use the pattern No 34 to No 45 when the button hole is small ø1 5 mm or less Pattern No Stitch shape Number of threads thread Standard sewing size X mm Standard sewing size Y mm 1 34 6 6 3 4 3 4 2 35 8 8 3 10 10 4 12 12 5 36 6 6 6 37 8 8 7 10 10 8 12 12 9 38 6 6 10 39 8 8 11 10 1...

Page 105: ...ork so as to prevent accidents caused by abrupt start of the sewing machine 2 Selection of the sewing pattern and the sewing width Selection of the sewing pattern is the same as that of the LK 1900BN When the distance between holes of the button used does not fit the standard sewing width of the sew ing pattern No adjust the sewing width by enlarging reducing the sewing width The way of enlarging ...

Page 106: ...s is the initial position Unless cylinder is in its recessed posi tion when the pneumatic air is supplied the piping connection is wrong Be aware that mechanical failures such as needle breakage can occur if sewing is continued in this state Loosen screw and adjust so that the center of needle hole guide is aligned with the center of hole in suction pipe when cylinder reaches its forward end M o v...

Page 107: ...te and moving knife removed in the joined state by removing hinge screw Remove two moving knife fixing screws from the joined parts Change moving knife with a new one In addition remove two setscrews and change counter knife with a new one 3 Place washer thickness select one from 0 3 to 0 7 mm between moving knife support plate and knife base to adjust the knife pressure ...

Page 108: ...0mm Fit work clamp rod in the slit in button guide foot Fix the work clamp rod with setscrew while pushing the rod upward The correct position of work clamp rod is as shown below Lateral position The longitudinal center is aligned with the center of the button Vertical position The undersurface of the work clamp rod is in parallel with the un dersurface of button guide foot To adjust check to be s...

Page 109: ...below stated cleaning should be carried out In the case of clean i n g t h e i n s i d e o f the hook with the throat plate base re moved take care not to stress right and left cylinder sensor cords and 2 Open the hook cover Blow cloth dust and thread waste off of the thread clamp by blowing air through the clearance between the throat plate base and the hook with an air gun or the like Cloth dust...

Page 110: ...s which are different from the LK 1903BBNS All other items are same with the LK 1903BBNS 1 SPECIFICATIONS Different specifications from those of the LK 1900BN only are described 1 Max sewing speed 3 200 sti min 2 Thread Polyester spun thread 60 80 3 Needle DPx17 11 14 4 Lift of the work clamp foot Max 10mm 5 Number of standard patterns 50 patterns 6 Air pressure 0 5 MPa 7 Air consumption 15 7 dm3 ...

Page 111: ...tacking 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 Stitch diagram 1 2 ...

Page 112: ...milunar bartacking Stitch diagram Sewing size mm Large size bartacking Knit goods 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...

Page 113: ...ved 2 Remove two screws Remove needle hole guide 3 When you remove two screws bird s nest preventing knife will come off Replace the knife with a new one Then attach the needle hole guide and knife base back to their positions WARNING Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine ...

Page 114: ...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 115: ...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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