JUKI SC-920 Instruction Manual
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JUKI SC-920 Instruction Manual

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ENGLISH
SC-920
INStruCtIoN MaNuaL

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Summary of Contents for JUKI SC-920

  • Page 1 ENGLISH SC-920 INStruCtIoN MaNuaL...

  • Page 2: Table Of Contents

    (2) Overlapped sttchng pattern ......................18 4. one-touch setting ..........................19 5. Production support function ......................20 6. Setting of functions of SC-920 ......................23 7. Function setting list .......................... 24 8. Detailed explanation of selection of functions ................28 9.

  • Page 3: Specifications

    To connect the SC-920 to a compact motor, assemble them referring to "M92 SUPPLEMENTARY SETUP INSTRUCTIONS". In the case the SC-920 is used for the DD (direct-drive) type sewing machine head, install the control box on the table followng the nstructons gve below.

  • Page 4: Changing Over The Voltage Between 100 V And 200 V

    200 - 240 V to 100 - 120 V Wiring for the single-phase 100 V ¡ Change the power cord with the JUKI genuine Be sure to connect the wire between 1 and 2. cord with the part number (M90355800A0).

  • Page 5: Installing To The Table

    2. Installing to the table In the case the SC-920 is used for the DD (direct-drive) type sewing machine head, install the control box on the table followng the nstructons gve below. The descrpton gven below refers to the case the SC-920 is installed on the table of the DDL-9000B.
  • Page 6 < the relation between the respective machine heads and the positions of installing hole of the bracket are as described in the table. > Table 1 F o r t h e D D L - 5 5 5 6 a n d Installng hole Screw LZ-228*, the machine head...

  • Page 7: Connecting The Cords

    (Caution) For the SC-920 Series, 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 8 [Connecting the connector for the operation panel] The SC-920 is provided with a connector for the op- eraton panel. Fully nsert connector !1 nto connector (CN38) !2 on the PWB until it locks without fail while carefully checkng the orentaton of connector !1 .
  • Page 9 [ Connection of the pedal of standing-work machine ] Connect the connector of PK70 !3 to connector !4 (CN39 : 12P) of SC-920. (Caution) Be sure to turn oFF the power before connecting the connector. 6) After nsertng the connector, put all cords together wth cable clp band !5 located on the sde of the box.
  • Page 10 11) Connect the power supply cord to the power plug 3ø 200V-240V Black socket. Connect, as shown in the figure, the white aC 200V-240V and black (and red) conductors or the brown and blue conductors to the power supply sde and the White green/yellow conductor to the groundng sde.
  • Page 11 [In case of using the power switch for La] Connect motor output cord @1 to connector @2 2 located on the side of the box. Installng power swtch 3ø 220V Black Connect power supply cord to the power switch. [LA specifications] 200V-240V 3-phase 220 V : Power supply cords : black, white,...
  • Page 12 7 Loosen nut H to remove the connector from clamp- 6 Turn connector G to remove the cord lockng sec- ng plate D . ton. 9 Install clampng plate D back to the control box. !0 Pass power cord J through condut K . 8 Put locknut I on the power cord and draw out the !1 Fix conduit K wth locknuts I wth clampng plate cord J from nsde clampng plate D .

  • Page 13: Attaching The Connecting Rod

    5. attaching the connecting rod WarNING : to protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and a lapse of 5 minutes or more. 1) Fix connecting rod 1 to nstallng hole B of pedal lever 2 wth nut 3 .

  • Page 14: 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. "#-6. Setting for functions 1) Refer to of SC-920" p.23, and call the functon setting No. 95. 2) The type of machne head can be se-...

  • Page 15: 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 cov- er is excessive after thread trimming, adjust the angle of the machine head by the opera- tion below.

  • Page 16: For The Operator

    #. For tHE oPErator 1. operating procedure of the sewing machine 1) Press ON button 1 of the power switch to turn ON the power. (Caution) If the power indicator LED on the panel does not light up after having turned oN the power switch, immediately turn oFF the power switch and check the supply voltage.
  • Page 17 4) For some types of the sewng machne heads, t s possble to program varous sewng patterns, usng the operaton panel, such as the reverse feed sttch- ng at sewng start and that at sewng end. Refer to "#-3. operating procedure of sewing patterns" p.17 for details when using CP-18 6 .

  • Page 18: Operation Panel (Cp-18)

    2. Operation panel (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 19: Operating Procedure Of The Sewing Pattern

    3. operating procedure of the sewing pattern (Caution) For the operation panel other than CP-18, refer to the Instruction Manual for the operation panel to be used. (1) reverse feed stitching pattern Reverse feed sttchng at sewng start and reverse feed sttchng at sewng end can be separately programmed. [Setting procedure of the reverse feed stitching] 1) Effective/ineffective of the reverse feed sttchng pattern can be changed over...

  • Page 20: Overlapped StTchNg Pattern

    (2) overlapped stitching pattern Overlapped sttchng pattern can be programmed. A : Number of stitches of normal stitching setting 0 to 15 sttches B : Number of stitches of reverse stitching setting 0 to 15 sttches C : Number of stitches of normal stitching setting 0 to 15 sttches D : Number of times of repetition 0 to 9 tmes...

  • Page 21: One-Touch Setting

    A part of functon settng tems can be easly changed n the normal sewng state. (Caution) For the setting of functions other than those covered in this part, refer to "#-6. Setting of functions of SC-920" p.23. [One-touch settng procedure]...

  • Page 22: Production Support Function

    5. Production support function The production support function consists of three different functions (six different modes) such as the production volume management function, operation measuring function and bobbin counter function. Each of them has its own producton support effect. Select the approprate functon (mode) as requred. ■...
  • Page 23 Sewing can be performed with the production support data displayed on the control panel. [Basic operation of the production support modes] 1) When switch 7 is pressed in the normal sewing state, LED E lights up to enter the production support mode.
  • Page 24 table 2: Mode resetting operation Swtch 5 Swtch 5 (held pressed for 2 (held pressed for 4 sec- Mode name seconds) onds) Target No. of pcs. display mode Resets the actual number of peces Resets the dfference between tar- (F100) get number of peces and actual number of peces Target/actual No.

  • Page 25: Setting Of Functions Of Sc-920

    6. Setting of functions of SC-920 Functions can be selected and specified. (Caution) For the function setting procedure of any operation panel other than CP-18, refer to the In- struction Manual for the operation panel to be used. 1) Tu r n O N t h e p o w e r w i t h swtch 7 held pressed.

  • Page 26: Function Setting List

    7. Function setting list Item Description Settng range Indcaton of functon settng Ref. page Soft start The number of sttches to be sewn at a low speed when the soft- functon start functon s used at the start of sewng. 0 to 9 0 : The functon s not selected.
  • Page 27 Item Description Settng range Indcaton of functon settng Ref. page 22 Needle up/down Functon of the needle up/down correcton swtch s changed correcton over. swtch 0 : Needle up/down compensation changeover 1 : One sttch compensaton functon 25 Thread trmmng Thread trmmng operaton after movng the needle away from operaton after ts upper or lower poston by turnng the handwheel by hand s...
  • Page 28 Item Description Setting range Indication of function setting Ref. page 50 Pedal Type of pedal sensor is selected. specification 0 : KFL 1 : PFL Refer to “#-10. Selection of the pedal specifications” p.38. 51 Compensation of Compensation of starting the solenoid for reverse feed stitching solenoid-on timing when reverse feed stitching at the start of sewing is performed.
  • Page 29 Item Description Setting range Indication of function setting Ref. page Pedal curve is selected. (Improving pedal inching operation) 87 Function of pedal curve selection Number of rotations 0/1/2 Pedal stroke Automatic UP stop function is set immediately after turning ON the 90 Initial motion up power.

  • Page 30: Detailed Explanation Of Selection Of Functions

    8. Detailed explanation of selection of functions 1 Selection of the soft-start function (Function setting No. 1) The needle thread may fal to nterlace wth the bobbn thread at the start of sewng when the sttchng ptch (sttch length) s small or a thck needle s used. To solve such problem, ths functon (called “soft-start”) s used to lmt the sewng speed, thereby assurng successful formaton of the startng sttches.
  • Page 31 8 Selection of the optional input/output function (Function setting No. 12) Select function setting No. 12 with the operating procedure of function set- tng procedures 1) through 3). Select the items of "End", "in" and "ouT" with keys 5 and 6 . [When "in"...
  • Page 32 Input function list Function Abbrevia- Function item Remarks code tion No function (Standard setting) Needle up / down compensat- Every time the switch is pressed, normal feed stitching ing 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...
  • Page 33 Output function list Function Abbrevia- Function item Remarks code tion 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 34 9 Sewing counting function (Function setting No. 14) The functon counts up every tme thread trmmng s completed and counts the number of completon of the sewng process. 0 : off Sewng countng functon s noperatve. 1 : on Sewing counting function is operative. (Every time thread trimming s performed) 2 : on External sewing counter switch input.
  • Page 35 !3 Function of reverse feed stitching on the way (Function setting Nos. 30 to 33) Functons of the lmt of number of sttches and thread trmmng command can be added to the touch back swtch on the sewng machne head. Function setting No.
  • Page 36 !5 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 lftng the presser foot. When the pneumatic type presser foot lifter is selected, the holding time control of lifting presser foot is lim- tless regardless of the set value.
  • Page 37 !7 Foot lift function after thread trimming (Function setting No. 55) Ths functon can automatcally lft the presser foot after thread trmmng. Ths functon s effectve only when it is used in combination with the AK device. 0 : off Functon of automatcally lftng the presser foot s not provded.
  • Page 38 @2 Function of soft-down of presser foot (with AK device only) (Function setting No. 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 39 @ 7 Initial motion uP stop position move function (Function setting No. 90) Effective/ineffective of automatic return to UP stop position immediately after turning ON the power can be set. 0 : Ineffectve 1 : Effective @8 Function added to the needle up / down compensating switch (Function setting No. 93) One sttch operaton can be performed only when the needle up / down compensatng swtch s pressed at the tme of upper stop immediately after turning ON the power switch or upper stop immediately after thread trimming.

  • Page 40: Automatic Compensation Of Neutral Point Of The Pedal Sensor

    9. automatic compensation of neutral point of the pedal sensor Whenever the pedal sensor, spring, etc. are replaced, be sure to perform following operation : 1) Pressing switch 4 , turn ON the power swtch. 2) Compensated value is displayed on ndcator B .

  • Page 41: Setting Of The Auto Lifter Function

    11. Setting of the auto lifter function WarNING : When the solenoid is used with the air drive setting, the solenoid may be burned out. So, do not mistake the setting. When the auto-lifter device (AK) is attached, this function makes the function of auto-lifter work. 1) Turn ON the power switch with swtch 5 held pressed.

  • Page 42: Selecting Procedure Of The Key-Lock Function

    13. Connection of the pedal of standing-work machine 1) Connect the connector of PK70 to connector 1 (CN39 : 12P) of SC-920. 2) Tighten the cord of PK70 together with other cords wth cable clp band 2 attached to the side of the box after passing it through the cable clamp.

  • Page 43: External Input / Output Connector

    Rotation by pedal is prohibited while “L” signal is being inputted. DC5V, –5mA SOFT Input Rotation speed is limited to the soft-speed while “L” signal is DC5V, –5mA beng nputted. SGND JUKI genuine part No. Connector : Part No. HK016510130 Pin contact : Part No. HK016540000 – 41 –...

  • Page 44: Connection Of The Material End Sensor

    15. Connection of the material end sensor 1) Connect the connector of material end sensor to connector 1 (CN54 : 4P) of SC-920. 2) Tghten the cord of the materal end sensor to- gether wth other cords wth cable clp band 2 attached to the side of the box after passing it through the cable clamp.

  • Page 45: Initialization Of The Setting Data

    16. Initialization of the setting data All contents of function setting of SC-920 can be returned to the standard set values. 1) Turn ON the POWER switch with all of swtch 4 , swtch 5 and swtch 6 held pressed.

  • Page 46: Replacing The Fuse

    3) Loosen setscrew 2 n cover 1 . Open cover 1 . 4) To close cover 1 , re-tghten setscrew 2 whle payng attenton to the orentaton of cable clp band 3 mounted on the side face of the box. 2.

  • Page 47: Error Codes

    3. Error codes In case of the followng, check agan before you judge the case as trouble. Phenomenon Cause Corrective measure When tilting the sewing machine, When tilting the sewing machine Tlt the sewng machne after turnng the buzzer beeps and the sewng wthout turnng OFF the power swtch, OFF the power.

  • Page 48: Error Code List

    In addi�ion, ��ere are ��e ��o��owing error code� in ��i� device� T�e�e error code� in�er�ock (or �i�i� ��unc�ion) and in��or� ��e prob�e� �o ��a� ��e prob�e� i� no� en�arged w�en any prob�e� i� di�covered� W�en you request our service, please confirm the error codes. [Checking procedure of the error code] 1) Turn ON ��e power �wi�c�...
  • Page 49 Description of error detected Cause of occurrence expected Items to be checked E055(*) Production management er- • This error number is displayed in the event • �eset switch �eset switch �eset switch of production management work manage- ment data fault. E056(*) Work management error •...
  • Page 50 • Check whether the applied power voltage is is inputted. higher than the rated voltage + (plus) 10% or more. • 200V has been inputted to SC-920 of 100V • Check whether 100V/200V changeover con- specifications. nector is improperly set.

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