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JUKI SC-500 Engineer's Manual

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SC-500
ENGINEER'S MANUAL
40019500
No.E359-00

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Summary of Contents for JUKI SC-500

  • Page 1 SC-500 ENGINEER’S MANUAL 40019500 No.E359-00...
  • Page 2 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. And this manual describes “Standard Adjustment”, Adjustment Procedures”, “Results of Improper Adjustment”, and other important information which are not covered in the Instruction Manual.
  • Page 3 SAFETY DEVICE Safety devices described below vary in accordance with the destination and specifications. Motor pulley cover Cover to prevent motor pulley and V belt from coming in contact with each other. Roll-in prevention pin Pin to prevent roll-in by V belt. Motor fan cover Cover to prevent motor fan from coming in contact...

  • Page 4: Table Of Contents

    6. CONTROL BOX (SC-500) ................7 (1) Arrangement of connectors ..................7 (2) How to use the standard operation panel ..............8 (3) Setting for functions of SC-500 ................13 (4) Function setting list ....................15 (5) Detailed explanation of selection of functions ............19 (6) Automatic compensation of neutral point of the pedal sensor ........

  • Page 5: Specifications

    390VA (460VA when LZ-228* is used) (460VA when LZ-228* is used) (460VA when LZ-228* is used) (Caution) 1. Power consumption is the mean power consumption when SC-500 is mounted on DDL-8700 in accordance with the operating conditions JUKI settles. 2. Power consumption varies in accordance with the operating conditions and the machine head on which SC-500 is mounted.

  • Page 6: Configuration

    9 Touch-back switch 3 Synchronizer !0 Thread wiping (wiper) device 4 L-shaped thread stand !1 Screw or caster for level adjustment of table / stand 5 PSC box (SC-500) !2 Resistor pack 6 Max. speed control knob 7 Motor (M-50) −...

  • Page 7: Explanation Of Optional Control Panel

    1) For the connecting destination of the connector, refer to the item (5) of 8. CONNECTING PROCEDURE WITH JUKI OPTIONAL DEVICES. 2) By connecting of CP-160, all displays of standard operation panel of SC-500 go off. However, error code No. is displayed only at the time of occurrence of error.

  • Page 8: Explanation Of Control Panel Cp-160

    (2) Explanation of control panel CP-160 1) Reverse stitching pattern When the sewing machine performs the free stitching operation, the machine performs the reverse stitching operation at the start and end of sewing. The reverse stitching operation can set the ON and OFF settings. Furthermore, single and double reverse stitching patterns can be selected.

  • Page 9: Example Of Application

    (3) Example of application 1) When the CP-160 is used together with the material end sensor (ED : optional), it can be used as a small edge-controller. mark 3 of the CP-160, turn ON material end sensor ON/OFF switch !2 (Method) Adjust the position to mark !3 of the automatic one-shot stitching.
  • Page 10 Section of EBT where the sewing machine is rotated at a low speed can be changed. Section of low SC-500 function setting No. 64 speed (0 to 250 rpm changeable) Time Example) Use for reference.

  • Page 11: Control Box (Sc-500)

    Following connectors are prepared when loosening the front cover fixing screws A of SC-500 and opening the cover. Connect the machine head connectors to the positions corresponding to each other so as to fit the devices mounted on the machine head.

  • Page 12: How To Use The Standard Operation Panel

    (2) How to use the standard operation panel switch Used for determining the contents of setting. When this switch is pressed, flashing stops and the contents of setting are determined. switch Used for changing the contents of setting. When this switch is pressed, changeable positions flash on and off. By pressing the switch, flashing position shifts in the right direction.
  • Page 13 Operating procedure of the sewing pattern 1. Reverse stitching pattern Reverse stitching patterns below can be set by using the operation panel. Reverse stitching patterns that can be set Reverse stitching at start display Sewing pattern Reverse stitching at end display [ Setting procedure of the reverse stitching ] Reverse stitching pattern Overlapped stitching pattern...
  • Page 14 switch 1 to make number of (5) Press stitches display 6 flash on and off, and set the number of stitches for the respective processes of the stitching. switch 3 or switch 4 to (6) Press change the number of stitches. The number of stitches can be changed up to as many as 15 stitches for the A, B, C, and D processes respectively.
  • Page 15 3. Special setting For material end sensor function, automatic thread trimming function, one-shot automatic stitching function and thread trimming prohibition function which are displayed in the front panel, it is possible to change the set value by directly moving to the function setting mode while the power is turned ON in addition to the normal function setting procedure. [ Moving procedure to the function setting mode ] switch 1, and press (1) Hold pressing...
  • Page 16 (Caution) When the specified number of stitches is insufficient, there is a case where the sewing machine cannot stop within the specified number of stitches depending on the speed of rotation of the sewing machine. 4) One-shot automatic stitching setting function (Function setting No.

  • Page 17: Setting For Functions Of Sc-500

    (3) Setting for functions of SC-500 Functions can be selected and specified by means of the four setting switches and light emitting diode located inside the front cover of the SC-500. Specified value Specified No. 1 Switch for entering specified value changed...
  • Page 18 (4) When you want to advance the setting No., press switch 2 to advance the setting No. Specified When you want to return the setting No., press switch 1 to return the setting No. (Caution) 1. When switch 1 (switch 2) is held pressing, the setting No.

  • Page 19: Function Setting List

    (4) Function setting list Indication of Ref. Setting Description Item function setting page range The number of stitches to be sewn at a low speed when the soft-start Soft start function is used at the start of sewing. function 0 to 9 0 : Soft-start function is not operative.
  • Page 20 Indication of Ref. Setting Item Description page range function setting Function of Function of needle up/down compensating switch on the operation panel changeover of can be changed. compensating 0 : Needle up/down compensation switch on the 1 : One stitch compensation operation panel function Function of fine...
  • Page 21 Setting Indication of Ref. Item Description range page function setting Position where the sewing machin reaches its highest sewing speed from Pedal stroke for pedal neutral position (Pedal stroke) reaching the 10 to 150 maximum (0.1 mm) number of rotation Compensation value of the pedal sensor Compensation of –15 to 15...
  • Page 22 Ref. Indication of Description Item Setting range page function setting Change-over Initial speed when starting reverse feed stitching at the sewing end 0 to 250 speed of EBT (r.p.m.) (end back tack) Function of soft- Presser foot is slowly lowered. down of presser 0 : Presser foot is rapidly lowered.

  • Page 23: Detailed Explanation Of Selection Of Functions

    (5) Detailed explanation of selection of functions 1 Selection of the soft-start function (Function setting No. 1) The needle thread may fail to interlace with the bobbin thread at the start of sewing when the stitching pitch (stitch length) is small or a thick needle is used. To solve such problem, this function (called “soft-start”) is used to limit the sewing speed, thereby assuring successful formation of the starting stitches.
  • Page 24 7 Sound of click of the key switch mounted on the PSC box (Function setting No. 11) This function selects whether the sound is effective or ineffective when operating the four key switches mounted on the PSC box. 0 : off The sound of click is ineffective. 1 : on The sound of click is effective.
  • Page 25 ! 1   Function of changeover of compensating switch on the operation panel function (Function setting No. 22) Function of compensation switch on the operation panel of CP-160 can be changed over to needle up / down compensating stitching or one stitch compensating stitching. 0 : Needle up / down compensating stitching 1 : One stitch compensating stitching !2  ...
  • Page 26 !6 Function of reverse feed stitching on the way (Function setting Nos. 30 to 33) Functions of the limit of number of stitches and thread trimming command can be added to the touch back switch on the sewing machine head. Function setting No.
  • Page 27 !7 Number of rotation of one-shot stitching (Function setting No. 38) This function can set, by the pedal operation of one time, the sewing speed of one-shot stitching when the sewing machine continues stitching until completing the number of stitches specified or detecting the material end. Setting range 150 to MAX.
  • Page 28 @0 Foot lift function after thread trimming (Function setting No. 55) This function can automatically lift the presser foot after thread trimming.This function is effective only when it is used in combination with the AK device. 0 : off Function of automatically lifting the presser foot is not provided. (Presser foot does not automatically go up after thread trimming.) 1 : on Function of automatically lifting the presser foot is provided.
  • Page 29 @5 Function of stop immediately after the reverse feed stitching at the start of sewing (Function setting No. 60) This function temporarily stops the sewing machine even when keeping depressing the front part of the pedal at the time of completion of process of reverse feed stitching at the start of sewing. It is used when sewing a short length by reverse feed stitching at the start of sewing.
  • Page 30 @9 Retry function (Function setting No. 73) When the retry function is used, if the sewing material is thick and not piereced with needle, this function makes the needle pierce in the material with ease. 0 : Normal 1 : Retry function is provided. #0  ...
  • Page 31 #5 Adjustment of the pedal stroke (Function setting Nos. 39 to 44 and 48) No.43 No.48 No.41 No.42 No.39 No.40 No.44 Speed in compliance with depressing Low speed amount of pedal section 10 11 12 13 14 15 (mm) Direction of depressing front part of pedal Direction of depressing back part of pedal No.48 No.42...
  • Page 32 6. Pedal stroke for reaching the maximum number of rotations (Function setting No. 44) Stroke between the pedal in its neutral position and the position where the sewing machine reaches at its highest speed can be adjusted. Adjusting range 1.0 to 15.0 [mm] <0.1 / mm> 7.
  • Page 33 $0 Function of prohibiting compensation stitching operation after turning handwheel by hand (Function setting No. 91) This function can select Prohibited/Effective of compensating stitch command after needle position detector signal is OFF once by turning handwheel by hand after stop of sewing machine. 0 : Effective 1 : Prohibited $1 Fine adjustment of number of rotations function (Function setting No.

  • Page 34: Automatic Compensation Of Neutral Point Of The Pedal Sensor

    (7) Initialization of the setting data All contents of function setting of SC-500 can be returned to the standard set values. (1) Pressing all switches 2, 3 and 4, turn ON the power switch.

  • Page 35: Changing Procedure Of The Pedal Type

    7. CHANGING PROCEDURE OF THE PEDAL TYPE 1. PFL type is the standard for the pedal type for SC-500 2. When PFL type is in the standard state, there is a section of auto-lifter and the amount of depressing the back part of foot pedal to actuate thread trimmer becomes larger (thread trimmer motion position is deep).

  • Page 36: Connecting Procedure With Juki Optional Devices

    8. CONNECTING PROCEDURE WITH JUKI OPTIONAL DEVICES (1) Bobbin thread remaining amount detection device, AE When using the AE device, the optional IO p.c.b. is necessary. Connect solenoid cord 1 attached to the side of the AE device to 2P plug (red) 2 attached to the IO p.c.b.

  • Page 37: Setting Of The Auto Lifter Function

    (4) Connection of the material end sensor (ED) (1) Connect the connector of material end sensor (ED) to connector 1(CN55 : 6P) of SC-500. (2) Tighten the cord of the material end sensor together with other cords with cable clip band 2 attached to the side of the box after passing it through the cable clamp.

  • Page 38: Connecting Procedure Of Cp-160

    (5) Connecting procedure of CP-160 1) Exclusive connectors are prepared for connection of the connector for CP-160. 2) aying attention to the orientation of the connector !2 , connect it to connector !3 (CN38) located on the circuit board. After connecting, securely lock the connector.

  • Page 39: Connector Connection Diagram

    10. CONNECTOR CONNECTION DIAGRAM Layout of the signals of machine head solenoid connectors CN36 and CN37 varies in accordance with the function revision of CONTROL circuit board (CTL circuit board). However, there is interchangeability for the specifications on the machine head side, and the signals can be used without change.

  • Page 40: Optional Cord

    (3) Optional cord Relay cord A asm. for the standing sewing machine (Part No. M9701351AA0) Approx. 1.5m 1) Wiring diagram of variable pedal PK-70 and -71 CN39 Brown Orange Variable resistor Used by variable voltage for speed Yellow between 1 to 2V (Increasing / decreasing Switch for Green...

  • Page 41: Maintenance

    2) Wiring diagram of fixing max. speed CN39 Brown Orange Variable resistor for speed Yellow Green Switch for lifting presser foot Blue Purple Switch for thread trimming Gray White Switch for high-speed Light blue Pink Switch for low-speed Black (Caution) When decreasing the speed of the high-speed SW, use the max. speed limitation variable resistor on the panel.
  • Page 42 [ Replacing F1 fuse on CTL circuit board (solenoid protection fuse) ] 1) Loosen two setscrews in the front cover and open the cover after checking that the power has been turned OFF. 2) Replace 5A F1 fuse on CTL circuit board with a fuse of the same capacity supplied as accessories.

  • Page 43: Changing Procedure Between 100V To 120V And 200V To 240V

    (2) Changing procedure between 100V to 120V and 200V to 240V (Possible only for the voltage changeover type) Voltage can be changed between single phase 100 to 120V and single phase/3-phase 200 to 240V by changing over the voltage changeover switch. (Caution) The voltage changeover switch is on the inside of the control box.

  • Page 44: Control Voltage Check Terminal Of Ctl Circuit Board

    (3) Control voltage check terminal of CTL circuit board Appearance of CTL circuit board assembled inside the front panel of SC-500 is as below. Control voltage check terminals are set up and the check whether or not the respective voltages are abnormal can be performed.

  • Page 45: Error Codes

    12. ERROR CODES In case of the following, check again before you judge the case as trouble. Phenomenon Cause Corrective measure When tilting the sewing machine, the When tilting the sewing machine without Tilt the sewing machine after turning OFF buzzer beeps and the sewing turning OFF the power switch, Action the power.

  • Page 46: Error Code List

    • When voltage higher than guaranteed one • Check whether the applied power voltage is higher is inputted. than the rated voltage + (plus) 10% or more. • 220V has been inputted to SC-500 of 110V • Check whether 110V/220V changeover switch is specifications. improperly set.

  • Page 47: Block Diagram

    13. BLOCK DIAGRAM CN40 (USER EXTENSION SIGNAL) CN41 (OPTIONAL P.C.B. I/F) CN36 (HEAD MAGNET DRIVE) 40016471 CN37 PEDAL SENSOR UNIT C ASSY 40012423 CN34 (FL) CTL PCB ASSY (PEDAL SENSOR) CN33 (SYNCHRONIZER) CN39 (STAND PEDAL) CN32 (HEAD DISCRIMINATION) CN38 * OP: CN30 (CP-160) CP-160 PANEL...

  • Page 48: Drawing Of The Table (For Ddl-8700)

    3-ø13 drilled hole (72.2) 339.7 ±1 68.1 ±0.5 ±1 2-ø3.5 depth 10 +0.5 JUKI (21) 52.5 logotype (525) (591) 2-ø 3.4 on the bottom surface, depth 10 Y - Y (Drill a hole at the time of set-up.) rubber cushion installing drawing for reference ±0.5...
  • Page 49 ＊ The description covered in this engineer's manual is subject to change for improvement of the TELEX : J22967 commodity without notice. Copyright C 2003 JUKI CORPORATION. All rights reserved throughout the world. 03 · 11 Printed in Japan (E)

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