JUKI SC-922 Engineer's Manual
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JUKI SC-922 Engineer's Manual

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SC-922
ENGINEER'S MANUAL
40104022
No.E399-01

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Summary of Contents for JUKI SC-922

  • Page 1 ® SC-922 ENGINEER’S MANUAL 40104022 No.E399-01...
  • 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. It is advisable to use the Instruction Manual and Parts List for CP-18,CP-180 and Machine heads together with this Engineer’s Manual when carrying out the maintenance of these machines.

  • Page 3: Table Of Contents

    2) Constant-dimension stitching pattern ....................8 3) Overlapped stitching pattern ......................9 4) Rectangular stitching pattern ......................10 (5) Example of application ....................11 5. CONTROL BOX (SC-922) ................14 (1) Connecting the cords ....................14 (2) Operating procedure ....................15 (3) One-touch setting ....................... 16 (4) Setting for functions ....................
  • Page 4 (1) Replacing of the fuse ....................69 (2) Method of voltage changeover .................. 70 16. REGARDING ERROR DISPLAY ..............71 (1) Error code list (SC-922) ....................73 17. BLOCK DIAGRAM ..................75 (1) SC-922 block diagram ....................75 18. DRAWING OF THE TABLE ................ 76...

  • Page 5: Specifications

    3) The conventional JUKI optional devices should be used upon confirmation of distributor. 4) By using the flash ROM for CPU, the future version-up can be adapted. 5) Connection of the motor unit (M51N) allows SC-922 to be used for a (belt) drive machine head. – 1 –...

  • Page 6: Name Of Each Component

    3. NAME OF EACH COMPONENT (1) LU-1510N-7/SC-922 Power switch Operation panel (CP-18 or CP-180) Thread stand Operation pedal Table stand level adjusting screw or caster Motor (M51N) Control box (SC-922) – 2 –...
  • Page 7 The motor drives the sewing machine at high, medium, or low speeds in response to output signals from the control box. Control box (SC-922) The control box contains the circuit that controls the machine head and motor, the output circuit that operates each output (thread trimming solenoid, back solenoid, wiper solenoid, etc.), pedal sensor for detecting pedal...

  • Page 8: Explanation Of Operation Panel

    4. EXPLANATION OF OPERATION PANEL (1) List of operation panels of CP-18 switch : Used for changing over effective/ineffective of the reverse feed stitching pattern. switch : Used for changing over effective/ineffective of the overlapped stitching pattern. switch : Used for confirming the contents of setting and for changing over effective/ineffective of the reverse feed stitching at sewing start.

  • Page 9: List Of Operation Panel Of Cp-180

    (2) List of operation panels of CP-180 Description Power indication LED : Lights up when the power switch is turned ON. Max. speed limit variable resister : Maximum speed is limited when this resister is moved in the left direction ( Pattern selector switch : Used for selecting a pattern from among the four different patterns.

  • Page 10: Operation Of The Connection Panel

    (3) Operation of the connection panel 1) Connecting procedure of CP-18/180 [Connection of the connector for CP panel] Exclusive connectors are prepared for connection of the connector for CP-18/180. Paying attention to the orientation of the connector connect it to connector (CN38) located on the circuit board.

  • Page 11: Explanation Of Operation Panel Cp-180

    (4) Explanation of operation panel CP-180 1) Reverse stitching pattern * In regard to the description about the CP-18 operator panel, refer to the Instruction Manual for the SC-922. 1. Press reverse stitching pattern switch specify the reverse stitching pattern.

  • Page 12: Constant-Dimension Stitching Pattern

    2) Constant-dimension stitching pattern 1. Press constant-dimension stitching pattern switch on the control panel to select the constant-dimension stitching pattern. 2. The constant-dimension stitching pattern is selected. Now, the predetermined number of stitches and the state of reverse stitching Sewing pattern function are shown on the control panel.

  • Page 13: Overlapped Stitching Pattern

    3) Overlapped stitching pattern 1. Press overlapped stitching pattern switch specify the overlapped stitching pattern. 2. The overlapped stitching pattern is selected, and the number of stitches and data on overlapped stitching which have already been specified are shown on the panel. 3.

  • Page 14: Rectangular Stitching Pattern

    4) Rectangular stitching pattern Sewing pattern 1. Press rectangular stitching pattern switch on the control panel to select the rectangular stitching pattern. 2. The rectangular stitching pattern is selected. Now, the predetermined number of stitches and other sewing data are shown on the control panel. 3.

  • Page 15: Example Of Application

    (5) Example of application 1) When the CP-180 is used together with the material end sensor it 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 turn ON mark...
  • Page 16 2) Label attaching is performed by the automatic one-shot stitching with the CP-180 (Method) Select mark on the CP-180, and turn ON mark of the automatic one-shot stitching. (Explanation) Number of stitches at 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).
  • Page 17 3) Seam joining of the reverse feed stitching at the end of sewing (For thick materials) Especially some sewing machine heads for thick materials are likely to fail joining the seam at the section of the following figure even if the timing of reverse feed stitching at the end of sewing is compensated. 1 At the timing to move to the reverse feed stitching action, Section of EBT the rotating speed at the section where the sewing machine...

  • Page 18: Control Box (Sc-922)

    For the SC-922, the machine head to be used with is to be selected in the course of the function setting procedure. To prevent an insertion error, remove the resistor pack for the machine head selection before use.

  • Page 19: Operating Procedure

    (2) Operating procedure 1. Press ON button of the power switch to turn ON the power. (Caution) When the power display LED does not light up even when the power switch is turned ON, immediately cut OFF the power and check the voltage. In addition, re-turn ON the power switch in such a case when 5 minutes or more have passed after turning OFF the power switch.

  • Page 20: One-Touch Setting

    (3) One-touch setting A part of function setting items can be easily changed in the normal sewing state. (Caution) For the setting of functions other than those covered in this part, refer to “5.-(4) Setting of functions”. [One-touch setting procedure] 1.

  • Page 21: Setting For Functions

    (4) Setting for functions Functions can be selected and specified. (Caution) For the function setting procedure of any operation panel other than CP-18, refer to the Instruction Manual for the operation panel to be used. 1. Turn ON the power with switch held pressed.

  • Page 22: Setting Procedure Of The Machine Head

    (Caution) For the operation panel other than CP-18, refer to the Instruction Manual for the operation panel to be used for the setting procedure of the machine head. 1. Refer to “III-(6) Setting of functions of SC-922 Instruction Manual”, and call the function setting No.

  • Page 23: Machine Head List

    (6) Machine head list Number of revolutions Max. number of Machine head Type Contents of display at the time of delivery revolutions (sti/min) (sti/min) LU-2210N/60N (VR type) LU2v 3500 3500 LU-2210N/60N (SW type) LU2r 3500 3500 LU-2212N (VR type) LU12 3500 3500 LU-2212N (SW type)

  • Page 24: Adjusting The Machine Head (Direct-Drive Motor Type Sewing Machine Only)

    (7) Adjusting the machine head (Direct-drive motor type sewing machine only) (Caution) When the slip between the white marker dot on the handwheel and the concave of the cover is excessive after thread trimming, adjust the angle of the machine head by the operation below. 1.

  • Page 25: Function Setting List

    (8) Function setting list (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Soft start The number of stitches to be sewn at a low speed when 0 to 9 function the soft-start function is used at the start of sewing.
  • Page 26 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Sewing counter Counting function of sewing (number of completion 0 to 2 of press) 0 : Sewing counter function is not operative 1 : Sewing counter function is operative (Every time thread trimming is performed) 2 : With the sewing counting switch input function...
  • Page 27 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Thread trimming Thread trimming function by reverse feed stitching function by on the way reverse feed 0 : Automatic thread trimming function after stitching on the completion of reverse feed stitching on the way is not operative.
  • Page 28 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page ∗ Pedal type Set the type of the pedal. setting 0 : There is presser foot no movement with the pedal (KFL) 1 : There is presser foot movement with the pedal (PFL)
  • Page 29 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Retention time The period from sewing machine stop to the 0 : Disabled of needle bar beginning of retaining the needle bar at the fixed 100 to 3000 at fixed position position is specified (ms)
  • Page 30 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Function of Pedal curve is selected. (Improving pedal inching 0/1/2 pedal curve operation) selection Number of rotations Pedal stroke Initial motion up Automatic UP stop function is set immediately after stop function...
  • Page 31 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page ∗ Back tack Back tack solenoid does not work during the movement 0 to 359 solenoid prohibition end point of view (No. 105) from a (°) movement movement prohibition start angle (No.
  • Page 32 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Setting of Selection of accessory devices is performed. — accessory devices Setting of Setting of the simplified program is performed. —...
  • Page 33 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Function of Enabled in combination with a machine head shortened equipped with the function of shortened stitching for stitching at trimming remaining short thread start/end...
  • Page 34 (Start level ; U : User’s mode, S : Service mode) Indication of Ref. Item Description Setting range Setting level function setting page Selection of The high-speed switch function is toggled. high-speed 0 : Switch of normal high speed switch function 1 : Switch of needle up/down compensation with one-touch operation while sewing stops Presence/...

  • Page 35: Detailed Explanation Of Selection Of Functions

    (9) Detailed explanation of selection of functions 1 1 1 1 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.
  • Page 36 8 8 8 8 8 Selection of the optional input/output function (Function setting No. 12) Select function No. 12 in the steps 1 to 3 of the operation procedure for function settings. Select the items of “End”, “in” and “ouT” with keys [When “in”...
  • Page 37 Input function list Abbrevia- Function Function item Remarks tion code No function (Standard setting) Needle up/down compensating stitching Every time the switch is pressed, normal feed stitching by half stitch is performed. (Same operation as that of up / down compensating stitching switch on the panel.) Back compensating stitching Reverse feed stitching is performed at low speed while the switch is...
  • Page 38 Output function list Function code Abbreviation Function item Remarks No function (Standard setting) Thread trimming output Output of thread trimming signal Thread wiper output Output of thread wiper signal Thread release output Output of thread release signal Presser lifter output Output of presser lifting signal Reverse feed stitching output Output of reverse feed stitching signal...
  • Page 39 9 9 9 9 9 Sewing counting function (only CP-180) (Function setting No. 14) This function count up every time thread trimming is completed and counts the number of completion of the sewing process. 0 : off Sewing counting function is in operative. 1 : on Sewing counting function is operative.
  • Page 40 # # # # # 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 41 % % % % % Holding time of lifting presser foot (Function setting No. 47) This function automatically lowers the presser foot when the time set with the setting No. 47 has passed after lifting the presser foot. When the pneumatic type presser foot lifter is selected, the holding time control of lifting presser foot is limitless regradless of the set value.
  • Page 42 & & & & & 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.
  • Page 43 w w w w w Function of soft-down of presser foot (with AK device only) (Function setting Nos. 70 and 49) This function can softly lower the presser foot. This function can be used when it is necessary to decrease contact noise, cloth defect, or slippage of cloth at the time of lowering the presser foot.
  • Page 44 i i i i i Function added to the needle up/down compensating switch (Function setting No.93) One stitch operation can be performed only when the needle up / down compensating switch is pressed at the time of upper stop immediately after turning ON the power switch or upper stop immediately after thread trim- ming.
  • Page 45 j j j j j Simplified program setting (Function setting No. 142) Operations of simplified programs are enabled or disabled, and settings of simplified program entry, simplified program change, and other operations are performed. Refer to “11. How to use simplified program function (2)” for further information on settings. k k k k k Brake angle when the needle stops at the up position at thread trimming (Function setting No.
  • Page 46 n n n n n Tie stitch adjustment function (Function setting Nos. 151, 152, and 153) Sewing temporarily stops at sewing start and end, and at each corner of overlapped stitching if reverse feed stitching and overlapped stitching are active. (Caution) If this function is set to ON, the function setting Nos.
  • Page 47 ™ ™ ™ ™ ™ Function of limiting alternate vertical speed (Function setting Nos. 162 and 163) Maximum speed is limited in accordance with the alternate vertical moving amount. Speed is limited by a lower speed limit resulting from comparing with a speed limit that is specific to a machine head.
  • Page 48 12. Use the key to set the value of SPd2 to “1500”. 13. Use the key to determine the set value. S P d 14. Use the key to select “_End”. 15. Use the key to end the setting, and the function setting mode re- sumes.
  • Page 49 A graph of the speed limit at the settings above is displayed. Speed [sti/min] Model-specific SPd1 :3000 Set value 3500 Decided limit value SPd2 :2800 3000 2500 SPd3 :1500 2000 SPd4 :1000 1500 1000 1 to 2.5 2.5 to 4 4 to 4.75 4.75 to 6.5 £...

  • Page 50: Connecting Procedure Of Optional Device

    6. CONNECTING PROCEDURE OF OPTIONAL DEVICE (1) Connection of the pedal of standing-work machine (PK) 1) Connect the connector of PK70 to connector (CN39 :12P) of SC-922. 2) Tighten the cord of PK70 together with other cords with cable clip band attached to the side of the box after passing it through the cable clamp.

  • Page 51: External Input / Output Connector

    OPO22 option 22 out put NPN open collector OPO23 Option 23 output NPN open collector OPO24 Option 24 output NPN open collector JUKI genuine part No. Connector : Part No. HK034610220 Pin contact : Part No. HK03464000A – 47 –...

  • Page 52: Example Of Material End Sensor Connection

    8. EXAMPLE OF MATERIAL END SENSOR CONNECTION For SC-922, a commercially available photoelectric sensor can be connected and used as a material end sensor. A connection example is shown below. 1. Connect the material end sensor to the connector Pin No.

  • Page 53: Initialization Of The Setting Data

    9. INITIALIZATION OF THE SETTING DATA All contents of function setting of SC-922 can be returned to the standard set values. 1) Turn ON the POWER switch with all of switch , switch switch held pressed. 2) “rS” is displayed on indicator with a blip to start initialization.

  • Page 54: Thread Trimming • Setting Of Accessory Devices

    10. THREAD TRIMMING • SETTING OF ACCESSORY DEVICES (1) Thread trimming setting For SC-922, optimal thread trimming is automatically selected by the selected machine head. In case of trouble such as uncut thread, however, fine operation adjustment can be performed.

  • Page 56: Setting Of Accessory Devices

    (2) Setting of accessory devices SC-922 can be equipped with a needle thread clamp device, a center guide device, and the like as accessory equipment on its machine head. Even operations of some devices can be finely adjusted. 1. Displayed contents and setting method Activate the setting mode with reference to “5.-(4) Function setting”...

  • Page 58: How To Use Simplified Program Function

    11. HOW TO USE SIMPLIFIED PROGRAM FUNCTION (1) Simplified program function SC-922 is equipped with the function that can create simplified programs to receive external signals, transit signals externally, and control the machine head without using dedicated input device. 1. Specifications...

  • Page 59: Flow Of Start & Entry

    (2) Flow of start & entry Activate the setting mode with reference to “5.-(4) Function setting” and select function No. 142. When function No. 142 is selected, the following are displayed. Use the key to select a program number. The screen at left is the case of selecting program No. 1. Press the key to move to the program setting mode.

  • Page 60: Command Entry

    (3) Command entry The displayed contents and method of command entry are described below. A program command is entered to each step in the step entry after program selection as shown below. The following flow is a case with respect to 1 command. Displayed contents and entry items are described below.

  • Page 61: Simplified Program Command List

    (4) Simplified program command list The command list and parameter list to be used for simplified program function are provided. Parameter 1 Parameter 2 Function code Abbreviation Command Output setting Setting range Input setting Setting range Setting range Setting range Remarks Enable oH.1 to 32...

  • Page 62: List Of Simplified Program Information Input Setting Codes And Connector Location List

    (5) List of simplified program information input setting codes and connector location list The following list shows port input codes indicated on the 7-segment LED at input, connector numbers on the substrate, pin assignment, functions, etc. Output list Input list Terminal Connector number Connector...

  • Page 63: Optional Power Supply

    (6) Optional power supply The following list shows the output pin assignment of optional connector power supply voltage. 1. List of input/output connector voltage output ports Connector No. Pin No. Function CN44 +12V CN51 +24V +24V CN58 +12V +24V +24V CN59 +24V +24V...
  • Page 64 2. Pin assignment of input/output connector signal system The following table shows the relationship between optional connectors and port input codes. Be sure to follow the precautions when using the product. 1) Input connector The optional input of the input connector can be connected to a transistor output, a relay output, an open collector output, a push button switch, etc.
  • Page 65 2) Output connector This optional output can be connected to up to a +24 V solenoid valve, an output to a PLC, an LED for display, etc. Connector No. Pin No. Port input code Function Machine head LED 1 output Machine head LED 2 output Machine head LED 3 output Machine head LED 4 output...
  • Page 66 3. Input/output circuits Output circuit Input circuit Output circuit Input circuit Output circuit Input circuit – 62 –...

  • Page 67: Flow Chart Of No. 142 Simplified Program Function

    (7) Flow chart of No. 142 simplified program function The flow of each input mode is shown below. P r o _ Transition with Transition with key Transition with key ∗ P r o _ _ E n d _ o F F Transition with key Transition with key Transition...

  • Page 68: Setting Of One-Touch Operations

    12. SETTING OF ONE-TOUCH OPERATIONS (1) One-touch operations For SC-922, given functions can be added to settable items by means of the method described in “5.-(3) One- touch setting”. Displayed contents and setting method Activate the setting mode with reference to “5.-(4) Function setting” and select function No. 161.

  • Page 69: One-Touch Settable Item List

    (2) One-touch settable item list Abbrevi- Abbrevi- Function item Function item ation ation 0 No function 71 Double reverse feed stitching function ACrA 1 Soft start stitching count SoFT 72 Machine startup selection function FACr 2 Material end sensor function 73 Retry function FrET 3 Thread trimming function by material end sensor EdTr...

  • Page 70: Connector Connection Diagram

    13. CONNECTOR CONNECTION DIAGRAM (1) Solenoid for machine head LU-1510N-7 CN36 8 9 10 11 12 13 14 TRMD TRM (Thread trimming) Ω Approx 9.3 TRM COM 1 2 3 4 5 6 7 BT COM WP COM TL SUB (Thread release) TL SUB Ω...

  • Page 71: Optional Cord

    14. OPTIONAL CORD (1) 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 Ω VR (1k Variable resistor Orange for speed Used by variable voltage between 1 to 2V Yellow (Increasing/decreasing...
  • Page 72 2) Wiring diagram of fixing max. speed CN39 Brown Orange Variable resistor for speed Yellow S GND Green Switch for lifting presser foot Blue S GND Perple Switch for thread trimming Gray S GND White Switch for high-speed Light blue S GND Pink Switch for low-speed...

  • Page 73: Maintenance

    15. MAINTENANCE (1) Replacing of the fuse (Caution) The illustration below shows the PWR-T PCB. The type of PCB differs by destination. 1) Remove all the cables which are connected to the control box. 2) Remove the connecting rod. 3) Remove the control box from the table stand.

  • Page 74: Method Of Voltage Changeover

    A. To change over the supply voltage from 200 - 240V to 100 - 120V Wiring for the single-phase 100V ¡ Change the power cord with the JUKI genuine cord Be sure to connect the wire between 1 and 2. If it is connected between 1-3 or 2-3, the sewing with the part number (M90355800A0).

  • Page 75: Regarding Error Display

    16. REGARDING ERROR DISPLAY 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 Tilt the sewing machine after turning buzzer beeps and the sewing without turning OFF the power OFF the power.
  • Page 76 In addition, there are the following error codes in this device. These error codes interlock (or limit function) and inform the problem so that the problem is not enlarged when any problem is discovered. When you request our service, please confirm the error codes. [Checking procedure of the error code] CP-18 1) Turn ON the power switch with switch...

  • Page 77: Error Code List (Sc-922)

    (1) Error code list (SC-922) Description of error detected Cause of occurrence expected Items to be checked E000 Execution of data initialization • When the machine head is changed. (This is not the error.) • When the initialization operation is executed...
  • Page 78 • When voltage higher than guaranteed • Check whether the applied power voltage one is inputted. is higher than the rated voltage + (plus) 10% • 200V has been inputted to SC-922 of or more. 100V specifications. • Check whether 100V/200V changeover •...

  • Page 79: Block Diagram

    SIGN INDUCING GROUND ELECTRICAL EQUIPMENT FINAL PRODUCT NAME FINAL PRODUCT No. * TYPE : A : 40103079 FLT-CE PCB ASSY SC-922 1PHASE 200-240V CE PFL NO-OPT D,E,F : 40087139 FLT-T PCB ASSY SC-922 1PHASE 200-240V PFL NO-OPT : NON SC-922 1PHASE 200-240V CN PFL NO-OPT...

  • Page 80: Drawing Of The Table

    80.5 Ｙ Ｙ Ｙ Ｙ Ｙ 2-ø3.5 depth 10 25.5 +0.5 52.5 2-3.4 depth 10 ± (480) JUKI logo type X–X (1:1) ø26 Y–Y ° ø8.5 W–W (1:1) Dimension drawing in detail (1:1) V–V (1:1) Style of type : Helvetida Reg. Condensed Thickness :1.5...
  • Page 81 <REFERENCE> TABLE OF DIGITAL DISPLAY Table of digital display Numeral Digital display Letter Digital display Letter Digital display Letter Digital display...
  • Page 82 Please do not hesitate to contact our distributors or agents in your area for further information when necessary. http://www.juki.com * The description covered in this engineer's manual is subject to change for improvement of the Copyright © 2011 JUKI CORPORATION. commodity without notice. All rights reserved throughout the world.

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