JUKI LBH-1700 Engineer'S Manual Download Page 84

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10. TROUBLES AND CORRECTIVE MEASURES

(1) With regard to sewing

Trouble

Cause (1)

Cause (2)

Checking order and adjusting procedure

Page

1. Needle thread breakage

1-1)

Attaching needle is wrong.

1-2)

Threading is wrong.

1-3)

There are scratches on the

thread path sections.

1-4)

Adjustment of thread tension

components is wrong.

1)-A

Direction of needle is wrong.

1)-B

Height of needle is wrong.

1)-C

Needle is bent.

3)-A

There are scratches on thread

take-up spring, thread take-up

lever, thread tension disk,

throat plate, needle bar thread

guide, etc. Or, thread path has

worn out.

3)-B

There is a scratch on the blade

point of hook or periphery of

hook.

4)-A

Bar-tacking thread tension is

too high or too low.

4)-B

Thread tension at parallel is too

high or too low.

4)-C

Tension or stroke of thread

take-up spring is improper.

Attach the needle so that the indented part of the needle faces to this

side as observed from the front of the sewing machine.

Insert the needle until the top end of the shank of needle comes in

contact with the upper end of the needle hole of needle bar.

Place the needle on the flat section of the table or the like, press the

shank section with fingers and turn the needle to check the deflection

of the needle tip. If the needle is deflected, replace it.

Correctly thread the needle thread.

Correct the scratch with buff, or replace the part. Especially take care

of the finish of the lower face of needle hole in the throat plate.

Correct the scratch with buff, or replace the part.

Checking the balance of stitches at bar-tacking section (needle thread

on the right side and bobbin thread on the wrong side), adjust the

tension.

Make the bobbin thread tension proper. Confirming the crest of seam

at parallel section of stitches, adjust the tension. (Refer to the Instruction

Manual.)

Standard stroke : 8 to 10 mm

Standard tension : 6 to 10g (In case of purl stitching)

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Summary of Contents for LBH-1700

Page 1: ...R ENGINEER S MANUAL 29339504 No 04 Electronic Buttonholing Machine LBH 1700 Series ...

Page 2: ...s advisable to use the relevant Instruction Manual and Parts List together with this Engineer s Manual when carrying out the maintenance of these machines In addition for the motor for the sewing machine with thread trimmer refer to the separate Instruction Manual or Engineer s Manual for the motor And for the control panel refer to the Instruction Manual for the control panel This manual gives th...

Page 3: ...of the stop motion solenoid 22 19 Longitudinal amount of the needle thread trimmer 22 20 Lateral position of the needle thread trimmer 24 21 Height of the needle thread trimmer 24 22 Position of winding the needle thread at the start of sewing 26 23 Opening timing of the needle thread trimmer 26 24 Spring pressure of the needle thread trimmer 28 25 Adjusting the needle thread trimmer lever 28 26 P...

Page 4: ...able Change not possible 60 7 MEMORY SWITCH 61 1 How to use the memory switch 61 2 Memory switch list 62 3 How to set the memory switch 63 4 DIP switches on the SDC circuit board 72 8 TEST MODE 73 1 How to use the test mode 73 9 ERROR DISPLAY LIST 74 10 TROUBLES AND CORRECTIVE MEASURES 80 1 With regard to sewing 80 2 Woth regard to mechanical components 89 3 With regard to electrical components 92...

Page 5: ...led Max 3 600 rpm DP X 5J SCHMETZ 134R 34 6 mm Link thread take up lever DP type full rotary automatic lubricating hook 12 mm Built in machine head type Drive by stepping motor rack and pinion Width of machine bed 185 mm Height from table top surface to top end of top cover 364 mm Length from front end of machine bed to rear end of motor cover 630 mm 50 kg Active tension method Digital setting for...

Page 6: ...e needle when the needle bar goes up by 2 3 mm standard or by 2 8 mm K from its lowest dead point At this time the distance from the top end of the needle eyelet to the blade point of the hook is 1 6 to 1 8 mm needle is in the central section of the hole in the throat plate 2 The clearance provided between the needle and the blade point of the hook is 0 01 to 0 04 mm needle is rocked to the right ...

Page 7: ...arance provided between the needle and the blade point of the hook is 0 01 to 0 04 mm when the needle is rocked to the right of the hole in the throat plate 3 In this state adjust the relation of the position of the inner hook and the bobbin case positioning stopper to 0 to 0 2 mm as shown in the figure below Then securely tighten with the stopper setscrew Bobbin case positioning stopper Sub class...

Page 8: ...g the reference of needle bar rocking components Needle bar rocking cam is located on the stitch base line side and the needle enters in the center of the hole in the throat plate when the clearance provided between the lower end of the needle bar rocking rod and the machine bed is 8 mm Needle rocking drive large gear Needle bar rocking cam Engraved marker line Hook driving shaft Needle rocking dr...

Page 9: ...htening the setscrew in the needle bar rocking arm rear tighten it so that there is no thrust play between the needle bar rocking arm rear and the needle bar rocking shaft bushing Setscrew Needle bar rocking arm rear Needle bar rocking rod When the engraved marker line is not aligned needle sways to cause needle breakage stitch skipping etc When the height of the needle bar rocking rod is improper...

Page 10: ...base line origin sensor should detect the origin detecting plate Caution The stitch base line stepping motor is the one with white connector Upper side Stitch base line stepping motor Needle bar rocking cam Condition The needle bar should be in the lower dead point of its stroke Condition The needle bar rocking cam should be on the stitch base line side Stitch base line PM arm Stitch width steppin...

Page 11: ... or key Input check Detection of the sensor can be checked by turning ON or OFF of the second LED from the left of the right 4 digit LED 1 0 Origin compensation procedure by means of the panel Refer to page 47 Pressing the key right turn ON the power Compensate the needle position with the origin compensation mode No 52 Setscrews in stitch width adjusting arm If the clearance is smaller than the s...

Page 12: ... stitch width amount is 0 mm the stitch width origin sensor should detect the origin detecting plate Caution The stitch width stepping motor is the one with blue connector Lower side Perform the adjustment when the stitch base line origin sensor is in the origin 8 Backlash of the feed gear Backlash 0 to 0 05 mm Stitch width origin sensor Feed gear Origin detecting plate Feed stepping motor Setscre...

Page 13: ...gear and feed shaft gear from the end tooth bearing 2 Loosen four setscrews in the feed stepping motor and move the feed stepping motor up or down in the direction of the arrow to adjust the backlash 3 Tighten the setscrews in the feed base so that the end tooth bearing of the gear sections of the feed gear and the feed shaft gear does not occur Caution After the assembling move the work clamp bac...

Page 14: ...n is detected When the feed origin is detected the distance from the top end of the feed shaft to the end face of the feed shaft bushing is 5 mm 10 Knife drop position Knife should drop in the center of the knife drop groove in the throat plate Knife drop groove Feed shaft Feed shaft bushing Setscrews Sensor installing plate setscrews Sensor installing plate Feed base Throat plate 2 5 0 3 mm 2 2 t...

Page 15: ...1 with the left or key Input check Detection of the sensor can be checked by turning ON or OFF of the leftmost LED of the right 4 digit LED Origin compensation procedure by means of the panel Refer to page 47 Pressing the right key turn ON the power Compensate the feed position with the origin compensation mode No 51 Adjust the position at the installing position of the throat plate base Throat pl...

Page 16: ...he concave of the knife bar is 0 to 1 mm c For the solenoid type the distance from the top surface of the machine arm to the top end of the knife bar is 4 to 5 mm when lightly pressing down the knife bar by hand Knife bar Needle bar Concave of knife bar Knife installing base setscrews Knife installing base Cloth cutting knife Solenoid setscrews Knife driving lever To lightly press by hand Knife dr...

Page 17: ... knife driving solenoid If the distance from the cloth cutting knife to the needle bar is smaller than the specified value the knife comes in contact with the needle bar As a result noise will occur the knife will wear out or cloth will be stained If the distance from the cloth cutting knife to the needle bar is larger than the specified value the distance from the front bar tacking and the knife ...

Page 18: ... 14 Standard Adjustment 1 Screws 2 Screw 3 Knife detector sensor installing base 4 Origin detecting plate 5 Pin 6 Knife detector sensor 12 Knife detector sensor ...

Page 19: ...cting plate 4 with screws 1 and 2 so that the detecting plate enters upper lower right left and center sections of the sensor detecting section when the knife bar returns to the upper side Caution When the knife bar returns to the upper side turn pin 5 and make sure that it does not come in contact with knife detector sensor 6 ...

Page 20: ...y arm Clearance provided between the starting safety arm and the presser bar lever is 0 3 to 0 8 mm 14 Adjusting the starting safety hook Starting safety hook Starting sensor plate Stopper Nut Starting sensor Starting safety lever Starting lever Stopper screw Starting safety hook Nut ...

Page 21: ... provided between the starting safety lever and the starting safety hook is 0 5 0 2 mm 0 3 to 0 7 mm when the starting lever is fully depressed When there is no clearance between the starting safety arm and the presser bar lever both parts interfere with each other and the presser may not be lifted If the clearance is excessively small starting may not function If the clearance is excessively larg...

Page 22: ... 18 2 Screws 4 Starting safety lever 5 Starting sensor 4 8 1 to 3 mm Standard Adjustment 15 Adjusting the starting sensor 1 Starting sensor plate 3 Starting safety solenoid base ...

Page 23: ... The dimension from starting sensor 5 to the bottom end of starting sensor plate 1 is 1 to 3 mm Caution Make sure that starting sensor plate 1 does not come in contact with starting sensor 5 when starting has functioned In addition do not perform the adjustment of the position of the sensor with starting safety solenoid base 3 since the play of starting safety lever 4 is adjusted with starting saf...

Page 24: ... lever 17 Adjusting the stop motion solenoid Clearance provided between the stop motion pressing plate and the stop motion bar spring is 0 5 to 1 mm when the starting safety hook engages with the starting safety lever Starting safety lever Spring Starting safety hook Setscrews Needle thread trimmer control lever Needle thread trimmer arm rear To engage with each other Starting safety lever Stop mo...

Page 25: ...ust so that the clearance provided between the stop motion solenoid spring and the starting safety lever is 0 5 to 1 mm If the pressing amount is large the needle thread trimmer control lever is deflected and the pedal becomes heavy If the pressing amount is small if there is a clearance the needle thread trimmer arm comes out to the front and the needle thread trimmer may interfere with the needl...

Page 26: ...nt 8 0 5 mm 18 Stroke of the stop motion solenoid Stroke of the stop motion solenoid is 8 0 5 mm 7 5 to 8 5 mm 19 Longitudinal amount of the needle thread trimmer Longitudinal amount 4 to 5 mm Setscrew Roller shaft Dec Inc ...

Page 27: ...ng is performed and when it is not performed Measure the distance between the needle thread trimmer shaft guide plate and the end face of the needle thread trimmer arm Needle thread trimmer shaft guide plate Stop motion bar Nut Longitudinal amount 4 to 5 mm Needle thread trimmer arm If the stroke is small the starting safety lever cannot be lifted up at the stop motion and the presser does not go ...

Page 28: ... of the needle and the top end of the trimmer comes out to the right by 4 to 6 mm from the center of the knife groove 2 End of closing of the needle thread trimmer upper knife is overlapped with lower knife by 0 5 to 0 8 mm 21 Height of the needle thread trimmer Install the needle thread trimmer as low as possible to such an extent that it does not come in contact with the presser Setscrews ...

Page 29: ... A to this side Loosen the setscrews in the needle thread trimmer and move the trimmer up or down to adjust the height Check after the adjustment The presser should not come in contact with the trimmer when inserting something of approximately 4 mm in thickness under the presser and moving the presser lifting lever up or down Needle thread trimmer actuating plate B Needle thread trimmer actuating ...

Page 30: ...mer is located on the right side by 2 1 mm 1 to 3 mm from the center of the knife groove at the start of sewing 23 Opening timing of the needle thread trimmer The period of retaining the needle thread is 1 to 3 mm from the start of sewing Then adjust the timing so that the trimmer gradually opens Needle thread locking bracket Lengthen Setscrews Shorten b ...

Page 31: ...ll shorten the period of retaining the needle thread On the contrary moving it to the rear will lengthen the period of retaining the needle thread Check after the adjustment After adjusting the trimmer move the feed and make sure that the trimmer does not come in contact with the presser foot or needle when the trimmer opens Spacer When the locking bracket latch is located excessively to the right...

Page 32: ...thread trimmer 25 Adjusting the needle thread trimmer lever Upper knife Lower knife Thread presser spring 1 mm Needle thread trimmer lever Needle thread trimmer driving cam Needle thread trimmer arm rear Needle thread trimmer locking bracket latch 0 to 0 5 mm ...

Page 33: ... Caution When sewing the thick materials or overlapped section set the sewing material to the machine use the forward key and confirm that the needle thread trimmer knife does not move to this side at the start of sewing In the case where the needle thread trimmer moves to this side perform again the aforementioned adjustment while the sewing material is set to the machine In case of type A refer ...

Page 34: ...bin winder trip latch to the hook sleeve is 5 to 7 mm in the state that the presser lifting lever has returned The protruding amount of the inner hook at the top end of the bobbin winder trip latch is 1 to 2 mm when the bobbin case is not placed in the hook and the presser is raised Standard Adjustment 2 to 3 mm 0 3 to 1 mm 0 3 to 1 mm 2 to 4 mm Bobbin thread trimmer Actuating cam setscrews Needle...

Page 35: ...r trip latch stopper for the protruding amount of the inner hook of bobbin winder trip latch when lifting the presser Caution If opening timing of the bobbin thread trimmer is too early and the opening amount is large the trimmer may open when the presser lifting lever has returned Lower the presser lifting lever by hand release your hand in this state and make sure that the trimmer does not open ...

Page 36: ...machine arm when the thread tension disk closes Presser bar position bracket Presser bar position bracket setscrew Slide roller installing base Work face of machine arm Thread tension solenoid shaft End faces ahould be almost aligned with each other Thread path groove of thread tension shaft is installed in the direction as shown in the figure and thread should enter from the arrow mark side Threa...

Page 37: ...tment make sure that the presser functions completely Loosen nut 1 to adjust the solenoid If the presser lifting amount is excessively increased the presser starts going up before the bobbin thread is trimmed If the slide roller installing base is bent when installing it will come in contact with the projection of the needle thread trimmer arm or the projection comes off Refer to 19 Longitudinal a...

Page 38: ...djustment 30 Adjusting the safety switch 31 Adjusting the bobbin winder 0 to 5 mm Safety switch installing base Safety switch push plate 0 7 to 1 0 mm Bobbin winder driving wheel Rubber ring Main shaft Bobbin winder ...

Page 39: ...the bobbin winder for a long period of time the rubber ring will wear down and slip As a result bobbin thread may not be wound At this time adjust and fix the position of the bobbin winder driving wheel Bobbin winder adjusting plate Clearance Make sure that there is a clearance between the bobbin winder adjusting plate and the bobbin in the state that bobbin thread is wound If the clearance is sma...

Page 40: ...ndard Adjustment 0 5 to 1 mm 32 Adjusting the thread breakage detecting plate 33 Adjusting the presser lifting solenoid When clearance is small large stroke When clearance is large small stroke 1 2 3 1 2 3 4 5 ...

Page 41: ...esser lifting solenoid turn the chain to adjust the position and securely fix the solenoid with shaft section 3 of the presser lifting solenoid and nut 4 Make sure that presser lifting lever 1 comes in contact with boss 5 of the bobbin thread trimmer driving arm when presser lifting lever 1 has returned Caution When the needle thread trimer bounds even with the aforementioned dimensions adjust so ...

Page 42: ...der 35 Adjusting the presser fall detecting plate Standard Adjustment 1 0 2 mm Presser fall detecting sensor 0 mm To lightly come in contact with each other Presser lifting lever Presser fall detecting plate 11 mm Thickness of table 40 mm 1 2 3 4 5 ...

Page 43: ...urned Fix the presser fall detecting plate so that a clearance of 1 0 2 mm is provided between the presser lifting lever and the presser fall detecting sensor Caution Install the presser fall detecting plate as high as possible The main shaft rotates after the sensor has detected The main shsft rotates before the presser lifting lever returns and the bobbin winder trip latch may be damaged if the ...

Page 44: ...Assembling procedure of the hook driving shaft 1 Insert A in the direction of b mark At this time pass the timing belt and the pinion through the hook driving shaft 2 Provide a clearance of 0 5 mm between the sprocket and the pinion and tighten setscrews in the bearing bush 3 Remove the play of inner ring and outer ring of the two bearings by pressing the hook driving shaft bearing in the directio...

Page 45: ...shaft into the pinion adjust so that the screw No 1 in the pinion is aligned with the engraved marker line on the large gear Refer to 3 Needle rocking timing on page 4 Assembling dimension of the hook driving shaft and the hook driving shaft rear bearing bush is 20 mm When drawing out the hook driving shaft take care so that the hook driving shaft intermediate bearing is not drawn out ...

Page 46: ... mark Assembling procedure of the main shaft 1 Insert counterweight 1 in the direction of e mark Adjust so that two pieces each of thrust bearing 2 and thrust washer 3 are located in the front and rear of the main shaft front bushing and there is no thrust in the main shaft and fix thrust collar setscrew 8 2 Make sure that the groove in the plunger is properly set and place the plunger and the spr...

Page 47: ...the center of the frame groove Make sure that the plunger moves up or down when turninh the main shaft by hand Take care of the engagement of the coupling Main motor flat setscrew No 1 position Direction of rotation Main shaft flat setscrew No 1 position When drawing out the main shaft from the front remove the components inside the face side plate in advance The main shaft can be drawn out from t...

Page 48: ...tension Timing belt driving the hook driving shaft determines the tension with the tension spring Standard initial tension of the timing belt 70N to 80N Main shaft Idler fulcrum hinge screw 1 Idler pulley Tension spring Idler fixing screw 2 Driving shaft ...

Page 49: ...osen 1 and 2 press the timing belt with fingers in the direction of e mark tighten 1 in the state that the fingers sre slowly returned and fix with 2 If the timing belt tension is low the belt runs around and may interfere with the machine frame Set the time to loosen and stretch again the timing belt to 4 four hours or less If the belt is left in the slack state for a long period of time it absor...

Page 50: ...etecting plate at position of 0 3 where the second one from the left of the numerals on the right side of the panel changes over almost from 0 to 1 as shown in the figure on the left 6 Make sre that the needle bar is in the upper dead point of its stroke 7 Turn OFF the power Caution Adjust so that the clearance provided between the upper detecting plate and the encoder section of the main motor is...

Page 51: ... the needle hole in the throat plate and the presser 2 5 mm 4 Loosen the setscrew in the feed origin sensor installing plate and fix the plate at the position of ON where the lamp on the left side of the lower left of the panel turns almost ON or OFF Refer to page 10 5 Press Right key 3 to set the right side to 0 6 Press key 4 and make sure that the distance between the presser and the needle hole...

Page 52: ...oat plate 4 Stitch width Left side 53 1 Select 53 with Left or key 2 2 Press key 4 3 Turn the hand pulley to bring the needle to the lowest point of its stroke on the stitch width side 4 Press the right side key to set the needle in the center of the needle hole in the throat plate When the needle does not move press the right side key after pressing key 4 5 Loosen the screw in the stitch width or...

Page 53: ...de cover section is collected with reflux felt 3 and the collected oil is sucked up through reflux pipe 4 2 Lubricating the respective components 1 Oil kept in oil tank 2 is lubricated to A To needle bar rocking rear arm 5 and needle rocking shaft 6 with oil wick B To main shaft front bushing 7 components with oil wick C To thread take up lever 8 components with oil wick D To needle bar 9 componen...

Page 54: ...turned to the normal state 4 Lubricating other components 1 Lubricating the hook is performed through felt 3 and the oil wick from oil reservoir 1 Adjustment of the amount of oil is described in the Instruction Manual Adjust with the screw in the hook sleeve when the adjustment cannot be performed with the screw in the machine bed only Check of oil pipe and reflux pipe When running the sewing mach...

Page 55: ... 51 MEMO ...

Page 56: ...ANCE KNIFE FEED LEFT CLEARANCE RIGHT LEFT BARTACK RIGHT READY RESET CLAMP WINDER THREAD Be sure to perform clamp selection before operation Table of presser type Type Part No 1 Type1 B151177 1 000 2 Type2 B151177 2 000 3 Type3 B151177 3 000 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 ...

Page 57: ...s key adds various data This key selects pattern No display No 4 5 6 7 8 9 0 1 2 3 4 5 6 D E S C R I P T I O N This key selects data display This key selects counter display This key selects thread tension setting at parallel section display This key selects thread tension setting at bar tacking section display This key selects data of various sections display when sewing LED goes off Overedge wid...

Page 58: ...width of left parallel section This item sets length of 2nd bar tacking section Square type radial square type radial taper bar radial straight bar eyelet square type eyelet flow bar tacking eyelet straight bar tacking 2nd bar tacking setting This item sets the clearance between 1st bar tacking and knife groove This item sets the clearance between 2nd bar tacking and knife groove Sewing machine pe...

Page 59: ...titches of eyelet shape section This item narrows width of 1sr cycle in terms of data No 4 overedging width setting This setting is effective in case of the shape of square type radial square type or round type This item sets the left parallel section tension at 1st cycle when double stitching is performed This setting is effective in case of the shape of square type radial square type or round ty...

Page 60: ...ng automatic setting by stitch width Number of stitches at the start of sewing number of stitches can be set by data No 26 Increase the number of stitches when slip off of needle thread occurs Pitch at the start of sewing it is effective to slighly enter the feed by data No 27 when needle thread breaks at the start of sewing Setting of the feed direction cannot be performed When thread frays or ne...

Page 61: ... width right at the start Data No 33 2nd bar tacking at the start Set value The thread tension changes early in the direction of The thread tension changes late in the direction of Ex In case of the purl stitching when the crest of seam at right parallel secion is formed late set the data No 32 Stitch width right at the start to direction Data No 31 Data No 32 Data No 33 ...

Page 62: ...g length 3 0 4 0 6 1st clearance 1 50 1 50 7 2nd clearance 1 30 1 30 8 Pitch at parallel section 0 35 0 5 9 Pitch at bar tacking section 0 30 0 30 10 Shape 5 5 11 Radial round type shape length 1 60 2 70 12 Number of stitches of radial shape 2 2 13 Reinforcement sewing off number of times 0 2 14 Bar tacking width right compensation 0 80 1 20 15 Bar tacking width left compensation 0 80 1 20 16 Knif...

Page 63: ...Without with 1stcycle 1stand2ndcycles Left parallel section tension Right parallel section tension 1st bar tacking section tension 2nd bar tacking section tension 1 2 stitching When double stitching is performed Selection Tie stitching width Number of stitches of tie stitching at sewing end 1st bar tacking length Number of stitches at the start of sewing Pitch at the start of sewing Stitch width r...

Page 64: ... type shape length Number of stitches of radial shape Reinforcement sewing off number of times Bar tacking width right compensation Bar tacking width left compensation Knife motion Without with 1st cycle 1st and 2nd cycles Left parallel section tension Right parallel section tension 1st bar tacking section tension 2nd bar tacking section tension 1 2 stitching When double stitching is performed Sel...

Page 65: ...ultaneously pressing Ready key 1 and Clamp key 2 turn ON the power and the mode becomes memory switch mode 1 Slect th memory switch No with Left or Left key 3 See page 62 2 Change the set value with Right or Right key 4 3 When changing respective data repeat steps 1 to 2 4 Turn OFF the power after completion of setting The respective set values of the memory switch are common to and effective for ...

Page 66: ...ife drive position Cloth cutting knife solenoid motion time Cloth cutting knife cylinder motion time Presser up drive waiting time Stop motion solenoid ON timing Stop motion solenoid action time Auto lifter pedal selection 1 2 pedals Continuous operation OFF ON Data setting change prohibition Permitted prohibited Start up waiting time Compensation of basting needle entry position Basting pitch Spe...

Page 67: ...ting of tension at the time of basting No 65 Setting of tension at the time of basting for sewing together 3 Individual tension setting of left right parallel section and 1st 2nd bar tacking section Memory switch No 39 This switch is used when individually setting tension of all left right parallel section and 1st 2nd bar tacking section 0 Individual setting impossible Common to left right paralle...

Page 68: ...cessary to replace the presser throat plate and feed plate Select it in case the standard presser arm is installed Calculation of sewing size Length total length Cloth cutting length length of 1st and 2nd bartackings width of 1st and 2nd clearances Width Width of overedging x 2 width of left right knife grooves Re Er 15 When performing plural motions of knife Er15 of Error No may occur since the k...

Page 69: ...sition of presser when 1 cycle is completed 0 UP position 1 DOWN position 8 Counter function Memory switch Nos 15 and 16 This switch sets the counter function on the panel No 15 Counter function selection 0 No function 1 UP counter function Count up when 1 cycle is completed 2 DOWN counter function Count down when 1 cycle is completed No 16 Start selection when count is 0 When selecting 2 DOWN cou...

Page 70: ...ithout connecting the variable resistor the tension becomes improper Do not make the setting effective when the variable resistor is not connected 10 Function switch setting Memory switch No 18 This switch sets the data No which is selected with F key on the panel It is convenient to register the data No which is often used Data No 13 Basting is set for the initial setting 11 Reinforcement stitchi...

Page 71: ... inch 1 Memory switch No 21 Set the cloth cutting knife size to 12 70 2 Memory switch No 22 Set the plural motion function to 1 With 3 Turn OFF and ON the power 4 Data No 1 Set the cloth cut length to 25 40 5 Press Ready key to start the sewing machine Actuate the knife three times during sewing to make a hole of 25 4 mm Overlapping amount when actuating the knife plural times is 2 mm 13 Selection...

Page 72: ... decimal points 17 Origin retrieval function Memory switch No 41 This switch is set when performing the origin retrieval at the time of completion of sewing 0 Origin retrieval is not performed 1 Origin retrieval is performed at the time of completion of sewing 2 For cycle sewing origin retrieval is performed every time 1 cycle is completed 18 Sewing start position setting function Memory switch No...

Page 73: ...performing this operation The pattern data 90 to 99 cannot be deleted 20 Origin compensation function Memory switch Nos 51 52 and 53 Refer to Adjustment of the origin sensor pages 43 and 44 21 Max speed limitation setting Memory switch No 98 This switch can limit the maximum number of revolution of the whole sewing machine The value of the data No 29 may be larger according to the order of setting...

Page 74: ... of the auto lifter 26 Stop motion solenoid ON timing Memory switch No 27 This switch can change the timing waiting angle from the upper dead point of one stitch before the last stitch to the drive of the stop motion solenoid SA type 27 Stop motion solenoid action time Memory switch No 28 This switch can change the length of time during which the stop motion solenoid is heled ON SA type 28 Start u...

Page 75: ...witch No 47 This switch is used when the thread breakage detection is desired to be invalid in case needle thread tension is low or the like 35 Memory switch function selection Memory switch No 48 When the memory switch is desired to be changed the memory switch can be changed without turning OFF the power by using this function It can be changed when the sewing LED went out The items of level P i...

Page 76: ... result in trouble Never change those switches Name function mode Selection of model Selection of model Selection of special action of reverse revolution to lift needle Selection of reverse revolution to increase penetrating force Selection of rotating direction of main shaft of sewing machine Selection of woodruff plate sensor active Change of thread trimming speed Selection of speed input method...

Page 77: ...ot used No 2 Thread breakage detection needle up position detection sensor knife return sensor and presser fall sensor No 3 Not used safety switch start switch and presser switch If you turn the sensor ON OFF the value will change 1 0 Display when the sensor is ON Feed origin sensor stitch base line sensor stitch width sensor and not used Thread breakage detection needle up position detection sens...

Page 78: ... after 2 two seconds has passed from presser lifting motion When presser lowering detection switch is OFF before turning ON the power Cloth cutting knife return error When cloth cutting knife does not return within 500 ms after turning OFF cloth cutting knife solenoid or cylinder Safety switch error When depressing pedal in the state that safety switch is OFF Temporary stop error When temporary sw...

Page 79: ...mp feed depending on the set values of knife size cloth cut length and 2nd clearance Cycle stitching data error When the data of selected pattern No is ineffective Sewing start position error When the sewing start position is larger than the bar tacking length When the sewing start position protrudes from the bar tacking length at the sewing start processing in accordance with the number of stitch...

Page 80: ...n the origin signal does not enter at the time of origin retrieval Stitch base line stepping motor origin retrieval error When the origin signal does not enter at the time of origin retrieval Stitch width stepping motor origin retrieval error When the origin signal does not enter at the time of origin retrieval RAM error Access to RAM error Pattern operation step over When the number of steps of s...

Page 81: ...ompensation Data No 15 0 Bar tacking right compensation Data No 14 Total width 1 X 2 2 3 9 0 Total length 4 5 6 7 8 No 1 Radial type 1 Stitch width Data No 4 2 Knife groove width left Data No 3 3 Knife groove width right Data No 2 4 Cloth cutting length Data No 1 5 Radial type shape length Data No 11 6 1st clearance Data No 6 7 2nd clearance Data No 7 Total width 1 X 2 2 3 Total length 4 5 X 2 6 7...

Page 82: ...gth Data No 1 2 Bar tacking width Data No 34 1 2 Total width 2 Total length 1 Shape No 8 Semilunar type 1 Stitch width Data No 4 2 Knife groove width left Data No 3 3 Knife groove width right Data No 2 4 Cloth cutting length Data No 1 5 Length of radial round type shape Data No 11 6 1st clearance Data No 6 7 2nd clearance Data No 7 Total width 1 x 2 2 3 Total length 4 5 x 2 6 7 1 2 3 4 5 6 7 1 2 3...

Page 83: ...hole Data No 37 6 1st clearance Data No 6 7 2nd clearance Data No 7 8 2nd bar tacking length Data No 5 9Length of bottom of eyelet hole Data No 38 0 Bar tackingwidth leftcompensation Data No 15 1 Bar tacking width right compensation Data No 14 2 Number of stitches of eyelet shape Data No 39 1 Stitch width Data No 4 2 Knife groove width left Data No 3 3 Knife groove width right Data No 2 4 Cloth cu...

Page 84: ...nted part of the needle faces to this side as observed from the front of the sewing machine Insert the needle until the top end of the shank of needle comes in contact with the upper end of the needle hole of needle bar Place the needle on the flat section of the table or the like press the shank section with fingers and turn the needle to check the deflection of the needle tip If the needle is de...

Page 85: ...11 4 mm K at the lowest point of the needle bar Adjust the height using the timing gauge 1 Perform adjusting timing when needle enters in the center of the throat plate of left stitch base line Loosen hook sleeve setscrew and adjust using the timing gauge 2 so that the blade point of hook comes in the center of needle when needle goes up from its lower dead point In addition make sure that needle ...

Page 86: ... is too many 10 B Width of tie stitching is too narrow 10 C Number of stitches of radial shape at the end of sewing is too many Remove thread single thread entangled in inner hook or outer hook Decrease the number of revolution Adjustment of thread take up thread guide A Increase tension at the start of sewing Delay the soft start speed Decrease the number of stitches at the start of sewing Enter ...

Page 87: ...ank section with fingers and turn the needle to check the deflection of the needle tip If the needle is deflected replace it Replace the needle Use a proper needle for the fabric or thread Perform adjusting the timing when needle enters in the center of the throat plate of left stitch base line At this time clearance provided between the bottom end of needle bar and the top surface of throat plate...

Page 88: ...Fabric flops since material is of thin knit or jersey 5 A Tension at the parallel section is too high 5 B Tension or stroke of thread take up spring is improper Correct the blade point or replace the hook and adjust the hook timing according to item 2 B Replace hinge screw for attaching the work clamp check holder Increase the presser pressure Use the presser suitable for the button hole Use the p...

Page 89: ...aise the lowest point of needle bar by 0 6 mm and re adjust needle to hook timing It is effective to slightly lower needle bar than the case of standard timing and to delay the hook timing Adjust the longitudinal position of needle thread trimmer driving cam so that the trimmer gradually opens at the position of approximately 2 to 3 mm from the start of sewing Correct the thread presser spring so ...

Page 90: ...e time of thread trimming is improper 2 A Adjustment of origin sensor 6 A Width of tie stitching is too narrow 6 B Number of stitches of tie stitching is too many Increase the number of stitches at the start of sewing Data No 26 Refer to 1 Needle thread breakage of trouble Refer to the item 1 of Adjusting procedure of the upper detecting plate Refer to the memory switch and decrease the number of ...

Page 91: ...sion is too low 1 B Bobbin thread tension is too low 2 A Bar tacking thread tension is too high 2 B Bobbin thread tension is too high 3 A Width of tie stitching is too wide 3 B Number of stitches of tie stitching is too small Increase the tension at the start of sewing Increase the tension at the parallel section Decrease the stroke of the thread take up spring and increase the spring pressure Low...

Page 92: ...position of needle thread trimmer is improper 2 B Needle stop position is too low 3 A Engagement of the needle thread trimmer driving arm and the driving cam is too tight Refer to the item 2 of STANDARD ADJUSTMENT Needle to hook timing Refer to the items 4 to 6 of STANDARD ADJUSTMENT Adjusting the needle entry point Replace the needle Refer to the item 25 of STANDARD ADJUSTMENT Adjusting the needl...

Page 93: ... A knife other than the genuine one is used 1 A Adjusting the play of knife bar is improper 1 B Cloth cutting knife interferes with needle bar 1 C Skew due to cutting waste or dust in drive section 2 A Sharpness of the knife is dull 2 B Setting of knife groove width is excessively large for the floppy materials 2 C Installing position of knife driving solenoid is improper Refer to the item 1 of ad...

Page 94: ...crew 1 C Operation of bobbin winder trip latch is improper 2 A Clearance provided between starting safety arm and presser lifting lever is too small 3 A Clearance provided between starting safety lever and spring of stop motion solenoid is improper 4 A Needle thread trimmer comes in abnormal contact with presser and actuating plate Remove work clamp carrier and clean around the throat plate Adjust...

Page 95: ...es in contact with bobbin thread puller 4 A When needle thread trimmer is removed and the presser lightly works it is supposed that the trimmer interferes with other parts 1 A Starting sensor plate comes in contact with starting sensor 1 B Needle thread trimmer control lever is excessively pressed to needle thread trimmer crank rear Remove the work clamp carrier and clean around the throat plate A...

Page 96: ... PWR circuit board If the resistance value is excessively lower than 12KΩ draw out CN11 on PWR circuit board and check continuity between Nos 2 to 6 pins of CN11 on MAIN circuit board If the resistance value is excessively low MAIN circuit board is defective Check continuity between the respective connectors of the stepping motor relay cord and the respective pins and earths of CN14 CN15 and CN16 ...

Page 97: ...transferred even when the sewing machine runs 2 Failure with SDC circuit board 3 Connection is defective or cable is defective Check the connection of CN17 CN41 and CN44 Perform the aforementioned check and replace MAIN circuit board if there is no trouble Draw out CN12 and replace SDC circuit board if the voltage of Nos 1 to 34 pins on the cable side is not DC 5V When panel operation or pedal ope...

Page 98: ...e heavy load 2 Failure with SDC circuit board Measure the voltage between Nos 2 to 3 4 and 5 pins of CN43 When the voltage does not change over HIGH LOW even by turning the main shaft by hand replace the servo motor When the signal from the sensor changes over HIGH LOW replace the SDC circuit board Check the connection of CN43 Measure the voltage between Nos 2 to 6 and 7 pins of CN43 When the volt...

Page 99: ...ailure with MAIN circuit board 6 Fuse has blown out Check the connection of transformer tap Check the power voltage When the power voltage is not defective replace the SDC circuit board Check the motor wiring Replace the SDC circuit board Replace the servo motor Move the contactless sensor up or down and adjust the installing position while checking the position with the motion display lamp Check ...

Page 100: ...ective or cable is defective 3 Stepping motor is defective Adjust so that the detecting plate covers the photo sensor slit when the knife has returned Check ON OFF with input check 2 of the test mode Check the connection of CN23 and CN59 Check ON OFF with input check 2 of the test mode Take care of the interference of the needle thread trimmer and the knife Check assembling of the photo sensor and...

Page 101: ...e stepping motors When fuse F5 has blown out there is a case of short circuit of wiring of thread tension solenoid presser liting solenoid or cloth cutting knife solenoid Check continuity between earth and connector pins of the respective solenoids In case of short circuit of wiring there is a case where the transistor on MAIN circuit board has already broken When there is no spare fuse replace th...

Page 102: ...ction is defective or cable is defective 1 Connection of SDC I F cable is defective or cable is defective 2 C o n n e c t i o n o f U P p o s i t i o n detecting cord is defective or cable is defective 3 Connection of encoder cable is defective or cable is defective 4 Failure with SDC circuit board 1 Stop position is changed Press reset key or press again the temporary stop switch to release Check...

Page 103: ...oove is wider than 1 2 of size of presser Adjust so that the detecting plate covers the photo sensor slit when the knife has returned Check ON OFF with input check 2 of the test mode Check the connection of CN23 and CN59 Check ON OFF with input check 2 of the test mode Take care of the interference of needle thread trimmer and knife Check the assembling Change the setting of memory switch Measure ...

Page 104: ...g width right knife groove right compensation exceeds 1 2 of the size of presser 2 Overedging width left knife groove left compensation exceeds 1 2 of the size of presser 1 When overedging width radius of eyelet hole knife groove width left exceed 1 2 of the width of presser size 2 When overedging width radius of eyelet hole knife groove width right exceed 1 2 of the width of presser size 1 When t...

Page 105: ...take up lever and contact of thread breakage detecting plate a n d t h r e a d t a k e u p s p r i n g becomes ON OFF 2 Adjustment of thread take up lever is improper 3 Connection is defective or cable is defective Change the data When the error occurs again replace the EEPROM Keep a copy of the pattern data setting of memory switch etc Clean the fan filter located in the rear of control box If te...

Page 106: ...2 CN43 and CN17 Check the insertion only of CN42 and CN43 in operation box and do not draw or insert them since the surface coat carbon on them will be taken off and defective contact will result Panel sheet is defective Replace the operation box Memory switch is set to the prohibition of change of parameter Operation box is defective Check the assembling Check the connection of CN14 CN15 CN16 CN5...

Page 107: ...th SDC circuit board 1 Limitation is applied to the number of revolution 2 Number of revolution of the pattern is set to low 1 Connection is defective or cable is defective 2 Set value of the tension is low 3 Failure with MAIN circuit board 1 Load is heavy 2 Thread tension solenoid is defective Check the connection of CN17 and CN41 Replace the operation box Replace the MAIN circuit board Replace t...

Page 108: ... SAFETY SWITCH CORD ASM PRESSER FALL CORD ASM PEDAL CORD ASM START CORD ASM CLOTH CUTTING KNIFE CORD ASM KNIFE RETURN CORD ASM PRESSER LIFT CORD ASM STOP MOTION CORD ASM SOLENOID VALVE CORD ASM BOBBIN WINDER POWER CORD ASM THREAD TENSION VR ASM THREAD TENSION ASM NEEDLE THREAD BREAKAGE ASM FEED ORIGIN TEMPORARY STOP KNIFE RETURN DETECTION STITCH WIDTH ORIGIN BASE STITCH LINE ORIGIN SAFETY SWITCH P...

Page 109: ...cting sensor Stitch width base line origin cord asm Stitch width origin sensor No Part No Name of part Remarks 4M ROM C B 1M ROM C B 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 HD00057000A M85116000A0 14512651 M85205900A0 M90115900A0 HD001350000 HD001350000 M85126000A0 HD00057000A M85136000A0A 14510085 M85266000A0 14510853 M85156000A0 14514251 M85146000A0 145130...

Page 110: ... ASM HEAD SENSOR CORD 1 ASM HEAD SENSOR CORD 2 ASM STITCH WIDTH ORIGIN CORD ASM SAFETY SWITCH CORD ASM PRESSER FALL CORD ASM PEDAL CORD ASM START CORD ASM CLOTH CUTTING KNIFE CORD ASM KNIFE RETURN CORD ASM PRESSER LIFT CORD ASM STOP MOTION CORD ASM SOLENOID VALVE CORD ASM BOBBIN WINDER PWR CORD ASM THREAD TENSION VR ASM THREAD TENSION NEEDLE THREAD BREAKAGE FEED ORIGIN TEMPORARY STOP KNIFE RETURN ...

Page 111: ... asm Solenoid valve asm Bobbin winder power cord asm Bobbin winder Thread tension VR asm Up position detect cord asm Safety switch cord asm Safety switch asm Transformer relay cord asm Power supply cable asm for JE 1M ROM 4M ROM For SB SC For SB SC For SB SC For SB SC For SB SC For SB SC For SA For SA Optional Optional For SB SC For SB SC For SA For SA For SC For SC Optional Optional Optional Cont...

Page 112: ...PWR CIRCUIT BOARD AB ASM RED RED ORANGE ORANGE BLUE POWER SW RED WHITE BLACK GREEN BROWN LIGHT BLUE GREEN YELLOW GREEN YELLOW RED BLACK WHITE WHITE YELLOW ORANGE BLACK BLACK BLUE BLACK BLACK BLACK BLACK BROWN BLACK WHITE WHITE BLACK MAIN CIRCUIT BOARD A ASM WHITE BLACK BOBBIN WINDER SDC CIRCUIT BOARD A ASM WHITE BLACK ...

Page 113: ... YELLOW POWER SW RED WHITE BLACK GREEN RED RED ORANGE ORANGE BROWN BLACK GREEN YELLOW GREEN YELLOW PWR CIRCUIT BOARD BB ASM RED BLACK WHITE WHITE YELLOW ORANGE BLACK BLACK BLUE BLACK BLACK BLACK BLACK BROWN BLACK WHITE WHITE BLACK MAIN CIRCUIT BOARD A ASM SDC CIRCUIT BOARD A ASM WHITE BLACK WHITE BLACK BOBBIN WINDER ...

Page 114: ... 110 SERVO MOTOR CIRCUIT DIAGRAM RED WHITE BLACK ORANGE BLUE PURPLE LIGHT BLUE PINK BLACK RED WHITE GREEN YELLOW ...

Page 115: ...M BLACK WHITE GREEN RED YELLOW BROWN BLACK WHITE GREEN RED YELLOW BROWN BLACK WHITE GREEN RED YELLOW BROWN ORANGE WHITE BLUE RED BLACK YELLOW BLACK YELLOW GREEN RED WHITE BLUE BLACK YELLOW GREEN RED WHITE BLUE NEEDLE ROCKING STITCH BASE LINE ...

Page 116: ...TURN 33 V PRESSER LIFTER 33 V STOP MOTION 33 V THREAD TENSION WHITE BLACK WHITE BLACK WHITE BLACK WHITE BLACK WHITE BLACK WHITE BLACK WHITE WHITE WHITE BLACK BLACK BLACK WHITE YELLOW WHITE YELLOW CLOTH CUTTING KNIFE KNIFE RETURN PRESSER LIFTER STOP MOTION THREAD TENSION ...

Page 117: ...RED RED WHITE WHITE BLACK BLACK YELLOW GREEN BROWN YELLOW GREEN RED WHITE BLACK YELLOW GREEN RED WHITE BLACK RED WHITE BLACK GREEN WHITE BLACK WHITE BLACK BROWN BLACK BLUE BROWN BLACK BLUE BLACK WHITE BLACK RED GREEN BLACK RED WHITE BLACK RED WHITE BLACK YELLOW GREEN BROWN RED WHITE BLACK HEAD SENSOR CIRCUIT DIAGRAM PRESSER FALL SENSOR FEED ORIGIN SENSOR THREAD BREAKAGE DETECTION SAFETY SWITCH KNI...

Page 118: ... 114 RED WHITE BLACK GREEN YELLOW BROWN NC NC NC PEDAL SWITCH CIRCUIT DIAGRAM 1 PEDAL TYPE SEWING MACHINE FOR STANDING WORK NC PRESSER START BLACK BLACK NC BLACK BLACK NC NC NC PRESSER START ...

Page 119: ...NG KNIFE 24V PRESSER LIFTER 24V 24V RED WHITE BLACK GREEN RED BLACK RED BLACK CLOTH CUTTING KNIFE PRESSER LIFTER 5V PARALLE GND 5V BAR TACK GND RED WHITE BLACK YELLOW GREEN BROWN PARALLEL SECTION BAR TACKING SECTION SOLENOID VALVE CIRCUIT DIAGRAM THREAD TENSION VR CIRCUIT DIAGRAM 2 PEDAL TYPE ...

Page 120: ... Yellow green brown VR3 Bar tacking section MAIN circuit board CN24 1 Thread tension VR 3 2 How to use the thread tension VR variable resistor Set the memory switch No 17 to 1 to use the thread tension VR Fine adjustment for the value set by the panel can be performed by using the VR 1 Set the respective tensions at parallel section and bar tacking section in advance 2 Turning the knob of VR of th...

Page 121: ...ed and check that there is no uneven torque If there is an uneven torque adjust the backlash of the feed gear Refer to page 8 3 Adjust the needle thread trimmer components Refer to the items 16 to 25 on pages 20 to 29 4 Adjust the opening timing and opening amount of the bobbin thread trimmer Refer to the item 27 on page 30 5 Set the memory switch No 11 kind of presser to 4 Refer to pages 61 and 6...

Page 122: ...ew Timing gauge B Presser 70 Urethane presser 70 Flat presser 70 Flat presser 60 Q ty 1 1 1 1 2 1 2 1 1 1 1 1 1 1 1 Remarks For max sewing length 70 mm For max sewing length 60 mm For max sewing length 70 mm For max sewing length 60 mm For max sewing length 70 mm for knit For max sewing length 70 mm for cloth For max sewing length 70 mm for heavy weight cushion materials For max sewing length 60 m...

Page 123: ...ttach the needle thread trimmer support with the needle thread trimmer support setscrews 19 Attach the presser roller installing base with the presser roller installing base setscrew 20 Attach the needle and the cloth cutting knife to the sewing machine 21 Adjust the needle thread trimmer properly Refer to the items 20 Lateral position of the needle thread trimmer 23 Opening timing of the needle t...

Page 124: ... 120 ...

Page 125: ... hole 4 7 drilled hole 20 depth facing depth 8 5 Control box installing hole Center of main shaft of sewing machine 2 2 drilled hole depth 10 bottom surface Main switch installing position 67 5 135 R 30 15 390 80 R 3 0 180 35 85 600 900 1130 60 110 110 60 120 48 25 115 180 70 60 80 368 71 Drilled hole 40 Drilled hole 17 Drilled hole 40 R4 6 78 4 R10 60 20 570 500 40 R4 R4 390 410 250 38 47 40 54 5...

Page 126: ...this engineer s manual is subject to change for improvement of the commodity without notice 01 09 Printed in Japan E R INTERNATIONAL SALES H Q 8 2 1 KOKURYO CHO CHOFU SHI TOKYO 182 8655 JAPAN PHONE 81 3 3430 4001 to 4005 FAX 81 3 3430 4909 4914 4984 TELEX J22967 Copyright c 1999 2001 JUKI CORPORATION All rights reserved throughout the world ...

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JUKI LBH-1700, Engineer'S Manual

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