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JUKI SC-920, Engineer'S Manual, Page: 2 / 75

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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 CP-180, IP-110F, 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 SC-920

Page 1: ...SC 920 40089311 No E393 00 ENGINEER S MANUAL...

Page 2: ...tions in detail It is advisable to use the Instruction Manual and Parts List for CP 180 IP 110F SC 920 together with this Engineer s Manual when carrying out the maintenance of these machines This man...

Page 3: ...Explanation of the operation panel CP 18 32 4 Operating procedure of the sewing pattern 33 6 Setting for functions 36 5 One touch setting 35 7 Setting procedure of the machine head 37 8 Machine head l...

Page 4: ...ord A asm for the standing sewing machine Part No M9701351AA0 58 11 MAINTENANCE 60 1 Replacing the fuse 60 2 Method of voltage changeover 61 12 REGARDING ERROR DISPLAY SC 920 62 1 Error code list SC 9...

Page 5: ...ther for single phase 100 to 120V or for 3 phase 200 to 240V by replacing the power cord up to the power switch and changing the voltage changeover connector inside the box In addition it can be used...

Page 6: ...over 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...

Page 7: ...ead 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...

Page 8: ...tive when the material edge sensor is installed on the machine or when the sewing machine is operated under the constant dimension stitching mode Even keep depressing the front part of the pedal the s...

Page 9: ...ON OFF automatic reverse feed stitch at sewing end feed stitch at sewing This switch cannot be used with the sewing machine which is not e c i v e d g n i h c t i t s d e e f e s r e v e r c i t a m...

Page 10: ...with the automatic thread trimming device Counter value setting This is the switch to set the value of bobbin thread counter of No of pcs counter switch Max speed limitation variable When moving the...

Page 11: ...onnector put all cords together with cable clip band 4 located on the side of the box Caution 1 Fix the cord clamp and the cable clip band following the attaching procedure 2 When removing the connect...

Page 12: ...If you want to change the number of stitches operate the or switch of switches for setting the number of stitches A through D The range of the number of stitches that can be changed 0 to 19 stitches 4...

Page 13: ...on operation Also if the pedal is returned to its neutral position and depressed its front part again the sewing can be continued regardless of the setting of number of stitches 7 If thread trimming p...

Page 14: ...ng the number of processes D The range of the number of stitches A B and C that can be changed 0 to 19 stitches The range of the number of processes D that can be changed 0 to 9 times 4 Depress the fr...

Page 15: ...sewing machine runs at a low speed compensating stitching If the automatic thread trimming switch is not specified sewing can be continued regardless of the setting of the number of stitches when the...

Page 16: ...can be used as a small edge controller Method Adjust the position to mark of the CP 180 turn ON material end sensor ON OFF switch of the CP 160 and turn ON mark of the automatic one shot stitching Ca...

Page 17: ...t the section CD can be set up to 500 stitches If the stitch length is 2 mm it is possible to sew approximately 1 000 mm 1 m This function can perform the automatic one shot stitching without using th...

Page 18: ...stitching action the rotating speed at the section where the sewing machine is rotated at a low speed can be changed SC 920 function setting No 64 Example Use for reference Condition Machine head of...

Page 19: ...10F Reverse stitching pattern No setting Reverse stitching Double reverse stitching at the start of sewing at the start of sewing 2 When changing the number of stitches change it with switched and for...

Page 20: ...g the number of processes D The range of the number of stitches A B and C that can be changed 0 to 19 stitches The range of the number of processes D that can be changed 0 to 9 times 3 Depress the fro...

Page 21: ...1 Turn ON the power 2 Press switch to display the information screen Information screen operator level 1 Sewing management information For the sewing management information there are the maintenance m...

Page 22: ...agement information Communication mode Compact flash TM format Maintenance personnel level 1 Turn ON the power When the needle bar is not in the UP position turn the handwheel to bring the needle bar...

Page 23: ...sewing management information is shown in reverse video Sewing management information screen Maintenance personnel level 4 Operation status screen The total record of the sewing machine is displayed...

Page 24: ...level The kind of data which can be handled with the operator level is different from that with the maintenance person nel level Record No Error No Time occurred Unit time When switch or is pressed t...

Page 25: ...Maintenance personnel level 7 Communication setting Data selection Press data selection switch in the communication screen Data selection screen Select the data to perform communication and press set...

Page 26: ...ation in the ten key screen or or key Ten key input or or key input is changed according to the kind of data Start of communication After all settings have been completed press communication start key...

Page 27: ...file of different Ver is downloaded Caution It is not possible to store and copy the function setting of the servo motor Folder structure of all sewing machine data MSP file in the Compact flash TM U...

Page 28: ...pact flash TM Create folder SC 920 in the PROG folder It is not necessary to create the folder when it already exists Copy the program file extension PRG Downloading of IP 110 program data Downloading...

Page 29: ...th IP 110F Press compact flash TM format switch in the information screen maintenance personnel level Compact flash TM format confirmation screen Formating is performed Confirm again whether formating...

Page 30: ...compact flash TM is not possible Write error E013 Return after reset operation Compact flash TM is in write prohibition state Write protect E014 Return after reset operation Formatting cannot be perf...

Page 31: ...n o i t c e n n o c e s o o l r o f 0 3 N C r o t c e n n o c l a n g i s r o t o m e h t k c e h C 1 2 d a e h e n i h c a m e h t n i t h g u a c s i d r o c e h t e c n i s n e k o r b s a h d r o...

Page 32: ...o t o M T r e w o p e h t F F O n r u d e t t u p n i y l r e p o r p t o n s i l a n g i s r o t o m e h t n e h W e r u l i a f r e d o c n E 0 3 9 E ction e n n o c s i d d n a n o i t c e n n o c...

Page 33: ...g Press to close warning screen and Refer to the relevant perform cleaning Then clear the value in the screen in regard to e c n a n e t n i a m e h t n e e r c s r a e l c Press to clear the value an...

Page 34: ...otor signal connector CN38 Operation panel Various kinds of sewing can be programmed For details of the op eration panel other than CP 18 refer to the Instruction Manual for the panel to be used CN33...

Page 35: ...h the depressing amount When the pedal is returned to the neutral posi tion the sewing machine stops 4 When lightly depressing back part of the ped al the presser goes up PFL type only 5 When strongly...

Page 36: ...to be changed The selected process ashes on and off switch Used for changing the content of the selected display ashing section and for changing over effective ineffective of the reverse stitch at se...

Page 37: ...not flashing on and off every press on switch changes over the reverse feed stitching mode from the reverse feed stitching at sewing start dou ble reverse feed stitching at sewing start and no reverse...

Page 38: ...anged over by pressing switch When the overlapped stitching pat tern is rendered effective LED lights up 2 Select a process A B C or D the number of stitches for which is to be changed by using switch...

Page 39: ...st speed of stitch of the machine head is set The upper limit of the set value differs with the type of machine head to which the SC is connected Setting range 150 Max value sti min Material end senso...

Page 40: ...etting No is moved forward or backward the previ ous or subsequent content of the setting is con rmed Be care ful when the content of a setting is changed when the switch is touched Example Changing t...

Page 41: ...tion Manual and call the function setting No 95 2 The type of machine head can be selected by pressing switch switch Refer to CAUTIONS WHEN SET TING UP THE SEWING MACHINE or Machine head list on the s...

Page 42: ...4500 4000 5000 4000 4000 4000 4500 3000 3000 Caution 1 When the dry type machine head is connected any model other than dry type one cannot be set 2 Refer to the machine head list 40088647 for the de...

Page 43: ...he power switch 2 is displayed in the indica tor and the mode is changed over to the adjustment mode 3 Turn the pulley of the machine head by hand until the main shaft refer ence signal is detected At...

Page 44: ...feed stitching Sewing speed of reverse feed stitching 150 to 3 000 sti min 8 1 9 0 0 9 Thread trimming prohibiting function Thread trimming prohibiting function to be used only with CP 18 0 Thread tr...

Page 45: ...One shot speed One shot speed The max value depends on the number of ro tation of the sewing machine head 150 to MAX sti min 3 8 2 5 0 0 49 39 Pedal stroke at the start of rotation Position where the...

Page 46: ...peed No 8 0 1 5 9 1 51 60 Function of stop immediately after reverse feed stitching at the start of sewing Function at the time of completion of reverse feed stitching at the start of sewing 0 Not pro...

Page 47: ...0 1 9 4 0 53 95 Head selection function Machine head to be used is selected When the machine head is changed each setting item is changed to the initial value of the machine head 9 5 d L b M 96 Max n...

Page 48: ...trol panel is used the function subtracts from the predetermined value and indicates the used amount of bobbin thread For the details refer to the instruction manual for the control panel 0 Bobbin thr...

Page 49: ...gnal output num bers and the connector pin con guration Example Setting the thread trimming function to the optional input port 1 1 Select function setting No 12 with the operating procedure of functi...

Page 50: ...s function works as the input signal of material edge sen sor 10 LinH Function of prohibiting de pressing front part of pedal Rotation by pedal is prohibited 11 TinH Function of prohibiting thread tri...

Page 51: ...ut for needle cooler 11 bUZ Buzzer output It is output when the bobbin counter set value has been exceeded an error has occurred or the bob bin thread remaining amount is detected 12 LSWo Revolution c...

Page 52: ...ally lowered it is automatically lifted at the second neutral position after it has come off the neutral position once 0 off Function of neutral automatic presser lifting is not operative 1 on Selecti...

Page 53: ...of depressing front part of the pedal automatic thread trimming is performed after reverse feed stitching as many as the number of stitches speci ed by the function setting No 31 has been performed 1...

Page 54: ...set ting No 51 On timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit of angle Adjusting range 36 to 36 1 10 Compensation of off timing of solenoid for...

Page 55: ...not provided Presser foot does not automatically go up after thread trimming 1 on Function of automatically lifting the presser foot is provided Presser foot automatically goes up after thread trimmin...

Page 56: ...ching at the start of sewing Normal use depending on the pedal condition Speed is accelerated to the highest without a break This function is used when temporary stop is used properly Cuff and cuff at...

Page 57: ...n Function setting No 120 Main shaft reference angle is compensated Setting range 50 to 50 1 UP position starting angle compensation Function setting No 121 Angle to detect UP position starting is com...

Page 58: ...ice becomes effective Selection of the auto lifter FL OFF Auto lifter function does not work Similarly the presser foot is not automatically lifted when pro grammed stitching is completed Solenoid dri...

Page 59: ...60 pulses rotation DC5V 3 MB Output DC5V 4 UDET N Output L is output when needle bar is at LOW position DC5V 5 DDET N Output L is output when needle bar is at UP position DC5V 6 HS N Output Rotation s...

Page 60: ...er switch after closing the front cover The machine returns to the normal motion Caution 1 When you carry out the aforementioned operation the neutral position correction value for the pedal sensor is...

Page 61: ...esser foot lifter Approx 5 4 CN37 DDL 9000B DS CN36 TRM Thread trimming Approx 7 5 BT Touch back Approx 6 5 WP Wiper Approx 8 5 BT SW Touch back switch TRMD 1 TRM COM 8 BTD 6 BT COM 13 WPD 2 WP COM 9...

Page 62: ...al in the PSC box and use it o Tighten the cord of the PK70 together with other cords with cable clip band attached to the side of the box after passing it through the cable clamp Caution Be sure to t...

Page 63: ...achine pedal in the PSC box and use it Caution In case of decreasing the speed of switch for high speed use the variable resistor for max speed limit mounted on the control panel CN39 1 2 3 4 5 6 7 8...

Page 64: ...ve the fuse Caution There is a risk of electrical shock when removing the fuse Be sure to remove the fuse after LED has totally gone out 5 Be sure to use a fuse with the designated capacity 3 15 A 250...

Page 65: ...unted on the PWR PCB with the con nector for 100 V f Connect the crimp style terminal of AC input cord to the power plug as shown in the gure A B C To change over the supply voltage from 100 120 V to...

Page 66: ...tion of the sewing machine varies irregular When tightening the screw in the handwheel is forgotten at the time of adjustment of needle stop position Securely tighten the screw in the handwheel Presse...

Page 67: ...Turn ON the power switch with switch held pressed 2 The latest error number is displayed on indicator with a blip 3 Contents of previous errors can be checked by pressing switch or switch When the con...

Page 68: ...d the guarantee of the machine head When the motor does not run Motor or driver is broken Check whether the thread has been entangled in the motor pulley Check the motor output connector 4P for loose...

Page 69: ...motor is wrong E808 Solenoid short circuit Solenoid power does not become normal voltage Check whether the machine head cord is caught in the pulley cover or the like E809 Holding motion failure Sole...

Page 70: ...17 1 352 8 7 1 0 1 352 8 7 1R 3 1 237 21 2 36 81 7 3 6 9 3 36 81 7 3 6 9 3 36 81 7 3 6 9 3 3 3 237 21 3 3 1 3 1 3 1 67 3 1 352 8 7 21 0 1 0 17 21752 1387 67 02725 25 66 3 3 1 67 6 1 3 5 7 25 66 3 1 2...

Page 71: ...67 2 IP 110F operation panel block diagram...

Page 72: ...itions 2 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...

Page 73: ...66 MEMO...

Page 74: ...2 3 4 5 6 7 8 9 Digital display Numeral A B C D E F G H I J Digital display Numeral K L M N O P Q R S T Digital display Numeral U V W X Y Z Digital display Table of digital display REFERENCE TABLE OF...

Page 75: ...ation operates 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...

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