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JUKI DDL-9000B-DS, Engineering Manual

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PREFACE

This Engineer’s Manual is written for the technical personnel who are responsible for the service and maintenance

of the machine.

The Instruction Manual for these machines intended for the maintenance personnel and operators at an apparel

factory contains operating instructions in detail.

It is advisable to use the Instruction Manual and Parts List for SC-920 together with this Engineer's Manual when

carrying out the maintenance of these machines.

This manual gives the "Standard Adjustment" on the former section under which the most basic adjustment value

is described and on the latter section the "Results of Improper Adjustment" under which stitching errors and

troubles arising from mechanical failures and "How To Adjust" are described.

Summary of Contents for DDL-9000B-DS

Page 1: ...40089335 No E392 01 ENGINEER S MANUAL Direct drive High speed 1 needle Lockstitch Machine with Automatic Thread Trimmer DDL 9000B ...

Page 2: ... instructions in detail It is advisable to use the Instruction Manual and Parts List for SC 920 together with this Engineer s Manual when carrying out the maintenance of these machines This manual gives the Standard Adjustment on the former section under which the most basic adjustment value is described and on the latter section the Results of Improper Adjustment under which stitching errors and ...

Page 3: ...ch length manual 26 3 Adjustment of reverse feed stitch length motor power 26 4 Optional switch 28 5 Adjustment of normal reverse stitching 30 6 Adjustment of Feed 0 30 1 Method by removing the gear box cover standard adjustment 30 7 Adjustment of the feed dial section 32 8 Installation of the reverse feed arm and the reverse feed solenoid 34 9 Stop position of the feed control spring rack 34 9 Ad...

Page 4: ...er shaft and the upper lower feed shafts 68 14 Adjustment of external parts 70 1 Adjustment of the pulley cover 70 2 Clearance of the hand wheel 70 3 Adjustment of the bobbin winder unit 72 1 Replacement of the bobbin friction wheel 73 2 Adjustment of the bobbin winder driver wheel position 73 4 Maintenance 74 1 Oil quantity check 74 2 Cleaning 74 3 Application of appropriate grease 74 1 Needle ba...

Page 5: ...New Defrix Oil No 1 or JUKI Machine Oil 7 equivalent to ISO VG7 2 Gearbox JUKI New Defrix Oil No 2 equivalent to ISO VG32 3 12 Lifting amount of presser Presser lifter lever 5 5 mm By knee 15 mm AK 8 5 mm DB x 1 11 DB x 1 21 DB x 1 SF 9 DB x 1 11 DB x 1 11 9 to 18 20 to 23 8 to 11 9 to 18 9 to 18 DP x 5 75 DP x 5 130 DP x 5 65 DP x 5 75 DP x 5 75 65 to 110 125 to 160 60 to 75 65 to 110 65 to 110 1...

Page 6: ...rt except for DDL 9000B DS Pulley cover Feed lever Thread stand Minute adjustable presser lifting screw Control box SC 920 Hand wheel Operation pedal Take up lever cover One touch type reverse feed button Finger guard Wiper Under cover Bobbin winder unit 1st thread tension Stitch dial 2nd thread tension ...

Page 7: ...d control thread trimming presser lifting motion only for AK 138 and more by depressing the front or back part of the pedal One touch type reverse feed button This button allows users to conduct reverse stitching Wiper The wiper moves the needle from the sewing material after thread trimming under control of the wiper signal from the control box Bobbin winder unit This unit is integrated into the ...

Page 8: ...SH Standard feed dog gradient The engraved marker dot on the feed bar shaft is adjusted by a feed dog of relevant standard Shipped feed dog B1613012I00 23614506 B S B MA B S D1613155W00 11403003 11062601 B MA B SH Engraved marker dot position on the horizontal feed bar shaft 9000B S 9000B MA 0 8mm 9000B SH 1 2mm a b A B a b a b A B Standard Adjustment ...

Page 9: ...zontal feed bracket shaft this can be a cause of unusual sound and improper linearity o If the gradient of the feed dog is adjusted for either shaft only the feed dog height may be changed Adjustments are needed for both shafts in all cases o According to the shaft adjusting position the position of feed dog motion may be shifted In such a case loosen the tightening screw of the X feed arm to adju...

Page 10: ... 6 2 Timing for the needle and the inner hook C D A B B 0 04 to 0 1mm A Standard Adjustment Lubricated hook K Part No 23621303 ...

Page 11: ...should be carried out under bright circumstances by giving a light to the spot for example Information about the dry hook A dry hook RP hook is employed for the DDL 9000B DS type For replacement use the part numbers specified below The hook part numbers come in two types according to the specifications 22890206 without the needle guard 22890404 with the needle guard 22890305 22890206 with special ...

Page 12: ...feed cam engraved marker line 0 20 Feed dial graduations 3 4 In a moment when the feed dog is positioned below the upper surface of the throat plate the upper end lower end of the throat plate for B SH of the needle hole shall be 0 1mm from the upper plane of the throat plate Needle and feed timing B SH Other than B SH Needle and feed timing Standard Adjustment ...

Page 13: ...ne of the throat plate In cases other than the DDL 9000B SH coincidence of the engraved marker dot of the pulley cover with the engraved marker dot of the flywheel can be regarded as the standard for needle hole upper end lowering When coincidence is confirmed tighten two lower sprocket screws Tightening torque for reference 4 5N m 5 Adjust the thread trimmer cam timing Refer to 3 11 Thread trimme...

Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...

Page 15: ...stments should be done within 20 2 graduations Cautions 1 When timing of the vertical feed cam is changed the feed timing is also changed against the needle When the timing is adjusted re adjustment is required in accordance with 3 Needle and feed timing 2 The angle of the engraved marker line graduation 1 denotes 10 o When tightening the two setscrews of the vertical feed cam this work should be ...

Page 16: ... insertion 1 Bobbin case with idling prevention spring Drawing is for 40000264 B A C o For the bobbin case with idling prevention spring 1 2 3 4 Ear Change the height 0 3 0 2mm Bobbin revolution Standard Adjustment ...

Page 17: ...on 1 Insert an old needle as illustrated and remove the spring by lifting it up Suggestion Use the thumb to prevent the spring from popping out 2 The spring tension can be changed by changing the height of the arch shaped section of the spring Make sure not to permit the free end of the spring to come out of the bobbin case 3 Firstly set the ear and insert the needle Then settle the ear is the sta...

Page 18: ...er hook presser position Other than DDL 9000B SH DDL 9000B SH Inner hook presser 40089607 40089610 Needle entry About the standard part numbers Standard Adjustment Inner hook As seen from above after removing the throat plate ...

Page 19: ... the center of the embossed part in the inner hook presser o If the embossed part of the inner hook presser has any flaw this can be a cause of thread break age or uneven sewing In such a case the damaged part shall be replaced with a new one o If the inner hook presser is positioned inadequately an extra tension is exerted when the thread comes out of the embossed part This can be a cause of shri...

Page 20: ...brication 1 Method of lubrication Float Float Standard Adjustment DDL 9000B S Specification for minute quantity lubrication DDL 9000B M Specification for semi dry items DDL 9000B DS Specification for dry items ...

Page 21: ...DL 9000B M Specification for semi dry items Face plate needle bar lubrication Lubrication by grease sealed in the needle bar lower metal Hook Forced lubrication by the plunger pump Quantity of oil can be adjusted by the hook oil adjusting screw Lubricant can be fed to the oil tank through the arm lubrication hole 3 DDL 9000B DS Specification for dry items Face plate needle bar lubrication Lubricat...

Page 22: ... Method of lubrication to the oil tank DDL 9000B S and DDL 9000B M only 3 Method of oil drainage from the oil tank DDL 9000B S and DDL 9000B M only A B Engraved marker line MAX Engraved marker line MIN Standard Adjustment ...

Page 23: ...n it is possible to check the quantity of oil in the oil tank The quantity of oil is adequate if the oil level stays between the MAX and MIN lines 3 Method of oil drainage from the oil tank DDL 9000B S and DDL 9000B M only When carrying the sewing machine or during maintenance servicing it is possible to remove the lubricant from the oil tank 1 Let the sewing machine fall down 2 Insert the oil pan...

Page 24: ... 20 7 Lubrication 4 Cleaning of the oil filter DDL 9000B S and DDL 9000B M only Standard Adjustment ...

Page 25: ...ing 3 Remove the lubrication pipe from the float case 4 Remove thread chips and material dust accumulated in the oil filter Refer to 4 Maintenance 4 Lubrication mechanism configuration and adjustments DDL 9000B SS SH MA MS o If there is clogging in the oil filter smooth lubrication cannot be maintained from the lubrication hole Adjustment Procedure Results of Improper Adjustment ...

Page 26: ...on 5 Oil in the gear box 6 Placement displacement of the gear box cover 7 Cautions for gear box cover oil during transportation Adequate oil level line top Adequate oil level line bottom Oil level Standard Adjustment ...

Page 27: ...ear box cover gasket Part No 40037166 2 The gear box cover and the bed mounting face shall be kept clean Wipe off waste oil from these parts 3 Tighten nine setscrews of the gear box cover 2 turn tightening 4 Remove the lubrication stop plug from the bed side and replenish 140cc of the JUKI New Defrex Oil No 2 JUKI New Defrex Oil No 2 Part No MDFRX2700C0 After replenishment confirm the oil level th...

Page 28: ...t front metal Bed Hook 3 to 10mm To be applied to the bed wall Oil trace checking paper Approx 70mm Unnecessary to worry about the quality of paper Apply the oil quantity trace checking paper to hook s lower side and check it from a distance of 3 to 10mm Oil quantity small Oil quantity large Oil sprinkles from the hook Oil sprinkles from the hook DDL 9000B SS B M 0 5 to 1mm DDL 9000B SH 1 to 3mm D...

Page 29: ...screw it is possible to carry out stable adjustments 2 Check the oil quantity about three times to confirm the stability 3 If the quantity of oil is too much before adjustments operate the machine continuously for about one minute so that the oil attached to the hook and remaining in the oil path can be flung off completely 11 Replacement of the hook shaft oil wick The hook shaft filter is a consu...

Page 30: ... 26 8 Adjustment of the amount of feeding 1 Adjustment of forward feed stitch length 2 Reverse feed stitch length check manual A 3 Reverse feed stitch length check motor power Standard Adjustment C B ...

Page 31: ...direction of the arrow so that the required figure is adjusted to the engraved marker dot A of the arm 2 Reverse feed takes place when the feed lever is pressed The status that the lever is pressed at the maximum corresponds to the graduation value of the feed adjust dial 3 Reverse feed stitch length check motor power 1 When the switch is pressed the sewing machine assumes the condition of reverse...

Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...

Page 33: ...imension stitching pattern is selected on the CP panel 3 Function of canceling reverse stitching at end once When the switch is pressed reverse stitching at end is canceled once for the next sequence 4 Thread trimming When the switch is pressed thread trimming can be carried out 5 Presser lifter function When the switch is pressed automatic presser lifting is carried out 6 1 stitch compensating st...

Page 34: ... 30 8 Adjustment of the amount of feeding 5 Adjustment of normal reverse stitching 6 Adjustment of Feed 0 1 Method by removing the gear box cover standard adjustment Standard Adjustment ...

Page 35: ...ar box cover Refer to 3 7 Lubrication 6 Removal mounting of the gear box cover 3 Loosen three setscrews of the auto reverse feed solenoid and remove this auto reverse feed solenoid 4 Loosen the feed changing arm B setscrew 5 Adjust the feed adjusting link A and the feed adjusting link B so that they are aligned in a straight line Tighten them with the feed changing arm B setscrew 6 Pinch a piece o...

Page 36: ... Part Configuration Diagram of the feed dial mechanism Arm s engraved marker dot Feed dial graduation 0 A Small recess Clearance A becomes wide Large recess Clearance A becomes narrow When the feed lever is pushed down the clearance A is 0 5 to 5mm between the feed dial stopper and the feed dial pin ...

Page 37: ...spring to the shaft section of the joined feed dial Enter the assembly in the arm 6 In the state that the feed dial graduation 0 coincides with the engraved marker dot of the arm join the feed dial screw with the feed adjust screw Cautions After joining confirm that the engraved marker dot of the arm coincides with the feed dial graduation 0 o If there is no clearance of A when the feed lever is p...

Page 38: ...erse feed solenoid Standard Adjustment 0 5 to 1 0mm 9 Stop position of the feed control spring rack Install the feed control spring rack 40086728 so that a distance of 2 3mm is kept between the oblong hole end plane of the bed column B and the end part of the setscrew 2 3mm A Details in Part A ...

Page 39: ...e reverse feed link is positioned in the center of the reverse feed plunger groove tighten the reverse feed arm setscrew 5 If the motion of the reverse feed plunger is not smooth this may result from the tilting of the bed column B Therefore loosen the two setscrews and adjust the bed column B to stand upright on the bed After adjustment fix the two setscrews 9 Stop position of the feed control sp...

Page 40: ...ifter 1 Adjustment of the presser pressure 2 Adjustment of thread release changeover A B C C Height of the presser adjusting screw can be read from the upper face value of the nut Example Approx 40mm Standard Adjustment Upward Downward ...

Page 41: ... unit OB Specifications excluded 2 Remove the cap that is located behind the sewing machine Using a hexagonal wrench of 3mm loosen the changeover screw o Lowermost mounting Thread tension release is possible with the knee presser lifter Standard o Uppermost mounting Thread tension release is impossible with the knee presser lifter Cautions Even when thread tension release changeover is ON there is...

Page 42: ...0652 Stopper screw 1 D5119206K0K Stopper collar 2 23610702 Stopper screw nut 1 SL6053592TN Stopper base setscrew 1 Components of the micro lifter unit 4 Adjustment of the micro lifter unit available separately Approx 9mm 22908552 Presser lifter cam using the head connector B1521555000 Presser lifter lever setscrew using the head connector Standard Adjustment ...

Page 43: ...ifter lever and take out the presser lifter lever made of resin material 2 Remove the face plate and hold the presser lifter cam with the fingers in order not to let it move toward inside of the arm Get the presser lifter lever around the presser lifter cam shaft and fix it with the setscrew of the presser lifter lever 3 Temporarily fasten the two screws of the face plate and get the upper setscre...

Page 44: ...t of upper stop position Stop position after thread trimming 2 Adjustment of lower stop position B A C D Standard Adjustment Setup No Functions Standard Setting range 121 Upper needle stop position 0 15 to 15 122 Lower needle stop position 0 15 to 15 E F ...

Page 45: ...tion the upper needle stop position is lowered Direction of C When the value is set in direction the upper needle stop position is raised Direction of D 5 When this setting is finished press the switch or to fix the updated value Cautions If the power supply is turned OFF prior to this work the contents cannot be updated 2 Adjustment of lower stop position The goal stop position is secured when re...

Page 46: ...ustment of the thread trimming cam position Standard Adjustment G The screw tip is flat The screw tip is pointed Inside Outside 2 Adjustment of the thread trimming link stopper screw A B 2mm Type I Type II B A B C E D F Greasing parts ...

Page 47: ... the stopper guide D 6 Insert the stopper spring C and the stopper guide D in this order in Part E of the stopper plate B 7 Fix the stopper plate B with two stopper plate setscrews A 2 Adjustment of the thread trimming link stopper screw 1 Turn the hand wheel and adjust the thread trimming roller to the inlet section G of the thread trimming cam groove 2 Loosen the thread trimming link stopper set...

Page 48: ...e thread trimming cam Turn the thread trimming cam in the direction of the arrow and fix the cam setscrew where the roller comes in contact with the outer periphery of the cam groove and stops there Drawing as seen from A left side Standard Adjustment A ...

Page 49: ... part begins to move At that time the armís engraved marker dot coincides with the hand wheelís engraved marker dot in green 2 Method of adjustment 1 Let the sewing machine fall down 2 Loosen the second screw and the first screw of the thread trimming cam setscrew in this order 3 Adjust the engraved marking dot of the hand wheel 4 Pressing the cam s driven part notch to the left make the thread tr...

Page 50: ...position of the moving knife Extreme backward position 9000B SS B DS B M 9000B SH Information about the initial position Needle core Needle core 3 to 3 5mm 2 5 to 3mm Moving knife positioning V groove 0 5 m m 0 2 t o 0 7 Standard Adjustment ...

Page 51: ...ter periphery with the V groove engraved marker line on the knife mounting base When the amount of withdrawal is large o It becomes impossible to scoop the needle thread or the bobbin thread at the time of thread trimming When the amount of withdrawal is small o Interference between the feed dog and the moving knife Adjustment Procedure Results of Improper Adjustment Specification Max amount of wi...

Page 52: ... 48 11 Thread trimming unit 5 Correct position of the counter knife 9000B SS B DS B M 9000B SH Needle center Set it in the center 0 6mm Needle core Standard Adjustment 0 5 m m 4 m m 6 m m ...

Page 53: ... without fail Also adjust the mounting angle of the counter knife Loosen two the counter knife setscrews and adjust the position of the counter knife Cautions The window hole section of the knife thread guide shall be adjusted so that the needle enters the center of the hole section When the counter knife is adjusted to the right o The bobbin and needle thread drawing length becomes longer than th...

Page 54: ... 50 11 Thread trimming unit 6 Adjustment of rise of the second thread tension disc Standard Adjustment ...

Page 55: ...ead tension release wire fixing screw and move the thread tension release wire to the right When decreasing the amount of rise Loosen the thread tension release wire fixing screw and move the thread tension release wire to the left Cautions After adjustments tighten the thread tension release wire fixing screw assuredly o If the amount of rise of the second thread tension disc is too small the nee...

Page 56: ... of the fixed knife blade tip Chamfering and careful polishing This face shall be filed Face A Blade tip Face B Sections C and D of the moving knife and the counter knife shall contact with each other at the same time C D Standard Adjustment ...

Page 57: ...e touch between the moving knife and the counter knife it is effective to change the angle in the direction of the arrow as illustrated 2 If the D side does not cut well decrease this angle If the C side does not cut well increase this angle o If the sharpness is still not good even though the blade face has been sharpened sufficiently this is because there is no simultaneous contact on the right ...

Page 58: ... 54 11 Thread trimming unit 8 Replacement of the moving knife Standard Adjustment ...

Page 59: ... the left and take it out from the lower side of the knife yoke 6 Mounting steps follow the reverse order as above When the moving knife hinge screw is loosened try to move the moving knife by hand to see whether it moves smoothly without rattling 7 Correctly set the yoke groove of the knife yoke in the moving knife pin and tighten the knife yoke hinge screw 8 Mount the moving knife link stepped s...

Page 60: ...he knife thread guide Right angle A p p r o x 4 m m 6 m m f o r S H 0 5 m m Standard Adjustment Knife thread guide Part No Remarks 9000B SS B MS B MA 40044189 9000B DS 40050588 40044189 with special surface treatment 9000B SH 40044190 Needle center ...

Page 61: ... between the knife thread guide and the blade tip of the counter knife In this case the distance is 4mm between the needle center and the blade tip of the counter knife Rectangular mounting 9000B SH 1 The distance is 6mm between the needle center and the blade tip of the counter knife Rectangular mounting Adjustment Procedure Results of Improper Adjustment o If there is no coincidence of the knife...

Page 62: ...learance is secured in the picker link and indispensable return motions damper function can be performed Standard Adjustment 0 5mm Butt A B 0 3mm In the status after standard adjustments the bobbin thread presser settles almost in the center of Character U of the bobbin case Type I Type II B A B C E D F Greasing parts ...

Page 63: ...r plate B with two stopper plate setscrews A 2 Method of standard adjustments Adjustment of clearance 1 Let the sewing machine fall down 2 Assume a condition that the thread trimmer solenoid is attracted by hand 3 Loosen the picker link pin nut 9mm and move the picker link to the right and left for adjustment 4 After the completion of adjustments fasten the parts assuredly 3 Method of standard adj...

Page 64: ... 60 11 Thread trimming unit 11 Adjustment of the driven part stopper Standard Adjustment 0 3mm 1mm ...

Page 65: ...read trimming device is not in action adjust two driven part stopper setscrews so that the gap length becomes 0 3mm between the notch of the camís driven part and the camís driven part stopper 2 Adjust two driven part stopper setscrews so that the gap length becomes 1mm between the notch of the camís driven part and the camís driven part stopper when the thread trimming solenoid is moved in the di...

Page 66: ...he knife unit Standard Adjustment Knife unit Part No Remarks 9000B SS B MS B MA 40050585 9000B DS 40050586 40050585 with special surface treatment 9000B SH 40050587 13 Installed length of the thread trimmer connector bar asm 99 5 0 4mm Standard 37 5 ...

Page 67: ... avoid loosening by mistake at the time of shipment ìwhite paintî is applied to the nuts 3 Loosen the nuts when removing the thread trimmer connector bar asm 40086708 without drawing out the lower shaft When the nuts are loosened the respective subsidiary parts are disassembled and the thread trimmer connector bar can be taken out 4 After disassembly reassemble the parts so that the standard adjus...

Page 68: ... 3mm 11 Thread trimming unit 14 Protrusion of the thread trimming shaft and stopper position Type I Standard Adjustment 2mm Type II 1 5 0 3mm 2mm Bed stud A Apply it so that it lightly touches the hole section of the bed ...

Page 69: ...trimming cam to 2mm Refer to 3 11 1 At the time of thread trimming stopper assembly this work should be carried out in the center of the oblong hole in the bed stud A Adjustment Procedure Results of Improper Adjustment o If the amount of protrusion is too small the action sound of the thread trimmer becomes large o If the amount of protrusion is too large the amount of picker action becomes small ...

Page 70: ... 66 12 Adjustment of the wiper DDL 9000B WB 2mm 1mm Standard Adjustment ...

Page 71: ...d fix the wiper adjust screw in a fashion to press the wiper At that time a distance of 1mm should be secured between the flat section of the wiper and the needle center 3 When no wiper is needed 1 Continuously press switch for one second 2 Actuate switch or switch to display wiper function 3 Make ON OFF changeover by means of switch or switch Adjustment Procedure Results of Improper Adjustment ...

Page 72: ... 68 13 Adjustment of the thrust values for the upper shaft and the upper lower feed shafts Standard Adjustment B A D B ...

Page 73: ... for the upper and lower feed shafts remove rattles from bearings pressurizing Work is required when the upper lower feed shaft is pulled out or when the setscrew of the upper lower feed shaft front bearing holder is loosened or when the C ring of the upper lower feed shaft right pulley side is removed 1 Install all the parts concerned with the upper and lower feed shafts 2 Loosen two setscrews of...

Page 74: ... 70 1mm 14 Adjustment of external parts 1 Adjustment of the pulley cover 2 Clearance of the hand wheel Standard Adjustment ...

Page 75: ...fully not to pinch cables and others 2 Clearance of the hand wheel 1 The clearance is 1mm between the hand wheel and the pulley cover For adjustments loosen the hand wheel setscrews 2 pcs o This can be a cause of marker dot displacement from the hand wheel o This can be a cause of maloperation o If a clearance is too much this can be a possible cause of entanglement of the thread from the thread s...

Page 76: ... the bobbin winder unit Let the bobbin winder lever coincide with the head of bobbin winder unit setscrew B 14mm In the state of OFF the standard distance of the bobbin winder lever is 14mm from the bobbin winder shaft Standard Adjustment Operator side ...

Page 77: ...ews 2 pcs of the bobbin winder driver wheel 3 Mount the bobbin winder unit on the arm 4 Turn ON the bobbin winder lever and let the head coincide with the bobbin winder lever At that time the head of the bobbin winder unit setscrew shall be made to coincide with the bobbin winder lever 5 Lightly make the bobbin winder driver wheel lightly contact with the bobbin winder friction wheel and tighten t...

Page 78: ... 74 4 Maintenance 1 Oil quantity check 2 Cleaning 3 Application of appropriate grease 1 Needle bar lower bushing DDL 9000B M B DS Specification Standard Adjustment ...

Page 79: ...s however periodic replenishment of the appropriate grease is effective approximately once every one to two years 1 Needle bar lower bushing DDL 9000B M B DS Specification Cautions This work should be done in the state that the needle bar and others are installed 1 Remove the face plate 2 Remove the greasing screw 3 Remove the cap of the appropriate grease and enter the feeder tip in the lubricati...

Page 80: ... 76 2 Feed bar mechanisms Loosen the setscrew and screw in and pull the M4 screw Standard Adjustment Grease groove filled with appropriate grease Grease groove filled with appropriate grease ...

Page 81: ...f the vertical feed cam interior conforming to the 9000B DS Specification 4 At the time of reassembly after the disassembly of various parts apply the appropriate grease to the sliding surfaces of the feed bar mechanism For the specification of lubrication hook 9000B S 9000B M o Lubrication is continued while hook oil is scattered around the vertical feed cam o When the reduced amount of hook oil ...

Page 82: ... 78 3 Face plate mechanism 5mm DDL 9000B SS SH only Standard Adjustment Section where the appropriate grease is applied Exclusive greasing point Slide portion between arm guide and roller ...

Page 83: ...ar keeps an exact contact with the oil wick in the position 5mm below the needle bar upper bushing If there is no contact correct it by means of the oil wick support plate Cautions Apply a piece of paper to the oil wick and confirm whether it is wet with oil o Grease is not required for the presser bar If grease is applied contamination like black ink is caused by the presser bar bushing and the m...

Page 84: ...xed to the arm Lubrication mechanism configuration of the DDL 9000B SS SH MA MS Standard Adjustment Fixed to the bed This part is not used in the DDL 9000B MA and MS The float case guide is entered in the slide guide of the peep window Float case cap appropriative to DDL 9000B MA MS ...

Page 85: ...o make a joint Push it until there is a feeling of coupling with a click sound 2 Float The float has an orientation Insert it in the float case with its flat plane positioned on the right as seen from worker side Be careful not to bend the bar of the float 3 Float case guide Put the float case guide in the guide groove section of the peep window and fix it to the bed 4 Peep window Remove the windo...

Page 86: ... mechanism Standard Adjustment This is an integrated press fitting component that cannot be disassembled Section where the appropriate grease is applied Part name Part No JUKI Grease A 40006323 Info about the appropriate grease ...

Page 87: ...bar crank setscrew Cautions The first screw in the revolving direction shall be made to coincide with the flat section of the shaft 12 Remove thrust rattles from the thread take up lever crank shaft and fix it being pinched by the thrust collar and the E ring Make thrust adjustments so that there are no thrust rattles and the thread take up lever crank can slide smoothly 13 Drive the needle bar up...

Page 88: ... 84 6 Replacement of the motor 7 Replacement of the timing belt Hand wheel Standard Adjustment Standard Adjustment Timing belt First screw Second screw ...

Page 89: ...Carefully install a new motor in the mounting position in correct revolving direction 9 In the procedures below reassembly can be carried out in the reverse order for disassembly o If no clearance is secured this can be a cause of motor bearing de struction o After disassembly reproducibility will be lost Part name Part No Motor 40089196 Coupling asm 40051473 The timing belt used is a product of t...

Page 90: ...achment and positions of external parts 219 5 13 5 14 1 61 149 62 5 80 156 2X3 8 5 139 7 82 Standard Adjustment M4 Depth 4 2XM4 Depth 4 Ruler seat 40035589 M4 Depth 4 M5 Depth 10 M8 Depth 9 M5 Depth 4 M5 Depth 8 2 X ø 1 0 ...

Page 91: ...hout lubrication According to 7 Lubrication set up the hook so that a very small amount of oil is fed 1 Take out the lubrication hook 2 Remove the hook shaft filter asm that is mounted on the hook shaft tip 3 Install a lower shaft stop plug screw and O ring which is available separately 4 Adjust the amount of hook oil so that lubrication is maintained to a degree wet with a small amount of hook oi...

Page 92: ...9 1 2 3 4 5 6 7 8 9 WP_COM 10 10 FG 11 11 CON_COM 12 12 BT_RTN 13 13 BT_COM 14 14 TL_SUB_COM 1 FL 2 1 2 FL_COM PWR board asm CTL board asm SC 920 CN140 CN39 CN46 CN40 CN48 U Thread trimmer Motor Thread wiper V W Presser lifter Black White Green Yellow Red Black Orange Yellow Red Purple Sky blue Pink Blue Reverse feed 7 Head section and control circuit connection diagram Connections between DDL 900...

Page 93: ... Part name Part No Quantity Hook cooling unit 400 23431 1 Filter regulator asm 400 23432 1 Finger valve PV 0151220 00 1 Filter regulator PF 0551060 A0 1 Regulator bracket PF 9020050 00 1 Plug PJ 0251000 03 1 Pipe bracket asm 400 23433 1 Pipe bracket 400 23434 1 Blowing pipe 400 23435 1 Wire holder A 110 45408 1 Urethane hose black BT 0400251 EB 1 Pan head screw 11 64 40 L 7 SS 4110715 SP 1 Mountin...

Page 94: ...type 1 E The needle thread is detached If there is a clearance at the tip of the hook thread presser at thread trimming due to wrong when the plunger is pushed by a finger toput the thread position of the hook thread trimming solenoid into the suction state and the hook thread presser presser is pushed into until the tip of the presser reaches the bobbin conduct readjustment with reference to 3 11...

Page 95: ...over Alternatively the thread is likely to be released from a loose material 3 B The needle is too thick The thinner the needle is the better the situation becomes unless no defective needle thread tension is found 3 C The needle hole of the throat Replace the current throat plate with a throat plate with smaller plate is too large needle hole 3 D The pressure is too low Use the presser stroke adj...

Page 96: ...iming of the tread trimming Inspect and adjust the standard timing of the thread is too late trimming cam with reference to 3 11 3 1 C The counter knife is set too back Adjust the counter knife with reference to 3 11 5 3 The underside of the material is not 3 1 The needle thread passing through 1 A Refer to the previous item The Refer to the previous item The needle thread passing neat at sewing s...

Page 97: ...oo late Slipping of the needle thread from the needle immediately needle immediately after thread hook timing causes the moving after thread trimming results from cutting the needle thread trimming knife to cut the needle thread to passing though the needle due to defective thread spread hold 3 threads before thread ing by the moving knife In such a case Thread chips of separation 40mm level exist...

Page 98: ...just the blade inclination and readjust the with those of the moving knife mounting position of the counter knife 7 The bobbin thread is untrimmed 7 1 The backward movement of the 1 A The backward movement of the Measure the backward movement length of the moving knife But the needle thread is trimmed moving knife is insufficient moving knife is inappropriately Adjust the position of the thread tr...

Page 99: ...them Use an appropriate gauge and needle for the thread thickness 9 3 The thread trimming drive unit 3 A The mounting position of the Make an adjustment with reference to 3 11 11 does not function thread trimming drive unit is inappropriate 9 4 The timing belt slips 4 A The tension of the timing belt is Replace the timing belt too low 4 B The knife pressure is excessive Adjust the engagement betwe...

Page 100: ...oo high Minimize the pressure For some materials sewing with the presser slightly floated with the adjustable screw of the minute presser lifter is effective 3 B The finish of the backside of the Use a buff or the like to smooth the presser presser is rough 3 C The presser is made from Use a fluorine resin presser or a special processed presser Nonsmooth material 1 4 The material is inappropriatel...

Page 101: ...th new one is inappropriate 5 F The feeding speed is too high Reduce the feeding speed 5 G Others Use a small gauge for a gap between the throat plate groove and feed dog in the moving direction without interference with the movement of the feed dog when a feeding pitch is small 2 Uneven material feed 2 1 Feeding is inappropriate 1 A The height of the feed dog is Lower the height of the feed dog 0...

Page 102: ...r possibility of balloon stitches or thread breakage 2 B The tension is too low The thread take up spring with too low tension cannot function well at high speeds or sufficiently take up the thread resulting in a higher possibility of balloon stitches or thread breakage 2 C The shape of the thread take Thread slack may cause catching thread when the tip of up spring is inappropriate the thread tak...

Page 103: ...The bobbin or bobbin case is 7 A Inappropriate engagement Replace the bobbin or bobbin case defective between the bobbin and bobbin case causes the bobbin thread to be caught 7 B Defective thread winding around Adjust the tension and position of the bobbin thread the bobbin winder causes the Also be aware of uneven winding bobbin thread to be caught 7 C The tension adjusting spring of Replace the ...

Page 104: ...ive sewing is likely to occur when the needle The needle is not mounted fully recess portion faces frontward to the end 1 C The needle tip is blunt Replace the needle 1 D The needle is too thin or thick Replace the needle for the thread to be used 1 E The feeding force is too weak Lift the feed dog height 4 2 The matters related to the hook 2 A The blade top of the hook is Sharpen the blade top of...

Page 105: ...oot bend 5 Needle thread breakage 5 1 The thread path including the 1 A The thread path is not smooth Finish the thread path appropriately throat plate and foot is defective 1 B The thread path has a flaw Finish the thread path appropriately 1 C The thread path has an obstacle Check threading again and conduct correction if necessary 5 2 The tension of the needle thread 2 A The tension of the need...

Page 106: ... Hook oil is insufficient Adjust the hook oil volume to the appropriate level 5 6 The matters related to the hook 6 A The thread path of the hook has Replace the needle are inappropriate a flaw 6 Thread breakage at back or back tuck 6 1 The needle mounting direction 1 A The needle mounting direction Mount the needle so that the needle recess portion faces sewing is inappropriate is inappropriate i...

Page 107: ... 60 or thicker thread 7 Thread breakage at needle entry or idle 7 1 Same as 6 Thread breakage at 1 A Same as 6 Thread breakage Same as 6 Thread breakage at back or back tuck sewing stitching back or back tuck sewing at back or back tuck sewing 7 2 The position of the knife thread Make an adjustment so that the needle comes to the hole center guide is inappropriate 7 3 The position of the needle ba...

Page 108: ...Try using B1418227T00 or B1418552A00 defective 9 Material breakage 9 1 The needle is defective 1 A The needle heat is too high Use silicon 1 B The needle is too thick Use a needle as thin as possible 1 C The needle tip is blunt Replace the needle 1 D The shape of the needle tip is Use a ballpoint needle KN S J B U Y etc inappropriate different needle type 9 2 The speed is too high Reduce the speed...

Page 109: ... the bobbin case the bobbin case is defective 2 D The bobbin thread idles in the Adjust the tension of the idling prevention spring with bobbin case reference to 3 5 2 E The bobbin is inserted into the Refer to 3 5 Irregular stitches are corrected by rotating bobbin case in the wrong direction the bobbin in the reverse direction 11 3 The needle or bobbin thread Increase the tension of the needle o...

Page 110: ... entry and presser bend if there is no needle entry 6 D The presser is floating Adjust the clearance between the presser bar holder and lifting plate 11 7 Backlash exists in the moving 7 A Irregular stitches occur due to Check whether there is a backlash and eliminate the back direction pitch fluctuations resulting from lash if necessary variation in the sewing speed 11 8 The stroke of the thread ...

Page 111: ...positions Y Y Section Rubber Installation Reference Figure X X Section Rubber Installation Reference Figure C1 5 to C2 5 only for hinged section Dimension Drawing in Detail 2 1 Style of type Helvetica Reg Condensed Vided Letters Thickness 1 5 Thickness 0 8 Thickness 0 5 Thickness 1 5 2 ø3 4 Depth at the rear side 10 Drill a hole at the time of set up 2 ø3 5 Depth 10 3 ø13 Depth 13 2 ø3 5 Depth 10 ...

Page 112: ...MEMO ...

Page 113: ...perates an environmental management system to promote and conduct the following as the company engages in the research development design sales distribution and maintenance of industrial sewing machines household sewing machines industrial robots etc and in the provision of sales and maintenance services for data entry systems 1 The development of products and engineering processes that are safe t...

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