Baby Lock Ovation BLES8 Service Manual
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Baby Lock Ovation BLES8 Service Manual

Baby Lock Ovation BLES8 Service Manual

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SERVICE MANUAL
MODEL BLES8
Ver. 1.0

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Summary of Contents for Baby Lock Ovation BLES8

  • Page 1 SERVICE MANUAL MODEL BLES8 Ver. 1.0...

  • Page 2: Table Of Contents

    INDEX 1. Needle ....................1 2. Adjusting chart .................... 2 3. Construction covers ..................3 4. Lower Looper Adjustment ................4 5. Needle Gurds Adjustment................4 6. Upper Looper Adjustment ................5 7. Chain Looper Adjustment ................6 8. Feed Dog Adjustment ................7 9.

  • Page 3: Needle

    1.NEEDLE NOTE: Before all adjustment, you are required to change all needles to new and correct ones. Needle System : ELx705CF ORGAN, SCHMETZ Model : BLES8, BLE8W-2, BLE8W, BLE8, BLE5-3, BLE5-2, BLE5 BLCS-2, BLCS Plating : Chrome Front Groove Back Groove Needle System : HAx1SP/CR ORGAN, SCHMETZ Model : BLE3ATW-2, BLE3ATW, BLE1AT-2, BLE1EX, BLE1DX-2, BLE1, BLE1SX,DX,LX,AT, BL101...

  • Page 5: Construction Covers

    3. Construction Covers...

  • Page 6: Lower Looper Adjustment

    4. LOWER LOOPER ADJUSTMENT NOTE: After adjusting loower looper, you are required to check JET AIR THREADING. a) Replacement of lower looper Lower looper fixing screw Slide the pipe rubber, and loosen the screw. Replace new lower looper, and slightly tighten the screw. Adjust the radius 55.9mm 0.1, and firmly tighten the screw.

  • Page 8: Chain Looper Adjustment

    7. CHAIN LOOPER ADJUSTMENT NOTE: After adjusting loower looper, you are required to check JET AIR THREADING. a) Chain Looper Position +0.1 b) Adjusting chain needle guards Overlock Chain Overlock Chain Needle Needle Needle Needle FRONT FRONT SIDE SIDE  Needle Chain needle 0.3‑0.4 front needle...

  • Page 9: Feed Dog Adjustment

    8. FEED DOG ADJUSTMENT a) FEED DOG HEIGHT ADJUSTMENT Loosen two screws "A" , rotate adjusting screw clockwise or counter-clockwise. Clockwise-----------------------Raise feed dog Counter-clockwise------------Lower feed dog Presser foot Pressure Clockwise Raise Screw A Counter-clockwise Lower Adjusting screw b) FEED DOG POSITION ADJUSTMENT Condition : Stitch Length 4 Differencial Feed N The minimum distance between needle plate and main/sub...

  • Page 10: Differencial Feed Adjustment

    9. Differential feed adjustment Correct positon : On condition diff.lever "N" position and stitch length dial "4", main feed dog(rear) and sub feed dog (front) move same length. How to adjust a) Set differential feed adjuating lever at “N” position. b) Loosen two screws of A.

  • Page 11: Replacing Chaining Tongue

    Cover plate Cheining tongue 10. REPLACEMENT OF CHAINING TONGUE a) Remove needle plate. Steel ball b) Remove cover plate. Spring c) Watching carefully not to jump out steel ball, remove chaining tongue and replace it. d) You are required to check the fixing position of the chaining tongue after replacing it.

  • Page 12: Cutting Width Adjustment

    13 . CUTTING WIDTH ADJUSTMENT 3.5 0.1mm a) Cut 1 layar cotton fabric and make a cutting width 3.5 0.1mm between the eye of needle hole and the edge of the fabric. Machine Settings Needle : Right Needle(O2) Thread : No Use Stitch Width Stitch Length : 2.5...

  • Page 13: Serting Fails

    14-1. SERCHING FAILES NOTE: In case that the looper threader does not work properly, please check and confirm the following points. Search the spot that has a problem a) Check whether the pump works properly or not. Depress the looper threading lever while pinching the cylinder tube between your thumb and fingers and check whether there is an air leak or not.

  • Page 14: Chain Looper

    14-2. ADJUSTMENT OF MOVEMENT OF PIPES NOTE: In case that adjusting JET AIR THREADING, do not lay down the machine body on the side. ) In case that the joint pipes do not move smoothly. UPPER LOOPER or LOWER LOOPER Loosen the screw "A"...

  • Page 15: Adjusting Positioning Of Pipes

    14-3. ADJUSTMENT OF POSITION OF PIPES NOTE: In case that adjusting JET AIR THREADING, do not lay down the machine body on the side. a) In case that the end of joint pipe is not in the center of joint pipe receiver. 1) Adjustment of upward and downward direction Check and confirm whether upper, lower and chain looper are in the standard position (See P4 , P5 ,P6and the service manual.)

  • Page 17: Replacing The Lower Shaft Unit

    15. Replacing the Lower shaft unit To remove To replace 1. Remove all covers except handle 26. Replace all covers See page 3 construction covers See page 3 construction covers 2. Remove needle(s) and Presser foot 25. Replace needle(s) and Presser foot 24.
  • Page 18 15. Replacing the Lower shaft unit To remove To replace 21. Replace upper and lower shaft timing 6. Remove upper and lower shaft timing belt, belt rotate the upper shaft and bring needlebar to top position See Page 29, 17. replacing upper and lower shaft timing belt rotate the upper shaft and bring needlebar...
  • Page 19 15. Replacing the Lower shaft unit To remove To replace 17. Replace connector and pull out the code 16. Replace screw and spacer of threading 10. Remove screw and spacer of threading engage link engage link 11. Remove threading engage shaft set 15.
  • Page 20 15. Replacing the Lower shaft unit To remove To replace 12. Remove diff. lever with link 14. Remove diff. lever with link Remove screw Pull out and spacer diff, lever loosen screw using alen wrench 13. Remove thread inlet set and cylinder tube 13.
  • Page 21 15. Replacing the Lower shaft unit To replace To remove 15. Remove joint pipe set and spring 11. Replace joint pipe set and spring Caution: Spring 16. Remove chain looper thread take-up set 10. Replace chain looper thread take-up set Remove two screws 17.
  • Page 22 15. Replacing the Lower shaft unit To remove To replace 8. Replace looper base set Make sure rollers are into driving cam 18. Remove knife driving rod set 7. Replace knife driving rod set Remove nut, This screw meets shaft flat screw and spacer Loosen two screws...
  • Page 23 15. Replacing the Lower shaft unit To remove To replace 20. Disconnect Pump driving rod from 5. Connect Pump driving rod and piston driving rod piston driving rod Remove screw and spacer 21. Remove arm bed support plate 4. Replace arm bed support plate Remove two screws...
  • Page 24 15. Replacing the Lower shaft unit To replace To remove 22. Remove two screws of centre bush 3. Replace and tighten two screws of holder centre bush holder Make sure lower shaft rotate smothly Caution: In case of shaft does not rotate smothly, try follows points beat bush holder slightly with wood or Remove two screws...
  • Page 25 15. Replacing the Lower shaft unit To remove To replace 23. Remove lower shaft unit 1. Replace lower shaft unit Hold pump driv- Place left side ing rod to avoid first touch armbed Caution: Pump cam angle Causion: Checking points as follows 24.lower shaft unit Clutch arm meet groove of clutch sleeve...

  • Page 26: Replacing The Upper Shaft Unit

    16. Replacing the Upper shaft unit To remove To replace 1. Remove all covers except handle 1. Replace all covers except handle See page 3 construction covers See page 3 construction covers 2. Remove needle bar unit 2. Replace needle bar unit See page 31-33, See page 31-33, 19.
  • Page 27 16. Replacing the Upper shaft unit To remove To replace 8. Remove needle bar main driving shaft 10. Replace needle bar main driving shaft screw and collar screw and collar screw and collar 9. Tighten sub driving shaft screws 8. Hold needle driving rod to right side 7.
  • Page 28 16. Replacing the Upper shaft unit To remove To replace 9. Loosen main and sub driving shaft 6. Make sure lower shaft rotate smothly screws Caution: In case of shaft does not rotate smothly, try follows points Support under arm part by hand loosen two screws beat bush holder slightly with wood or plastic hammer...
  • Page 29 16. Replacing the Upper shaft unit To replace To remove 5.Replace driving shaft 10. Slide driving shaft to left direction Hold sub driving arm Caution: Do not tighten screws Slide shaft with magnet or pin 11. Remove upper shaft centre bush Remove two screws 12.
  • Page 30 16. Replacing the Upper shaft unit To remove To replace 3. Replace upper shaft unit 13. Remove upper shaft unit 2. Loosen one screw of right side ATD driving gear 1. Turn the guar of ATD unit clockwise view from right side, bring front disk shut position Turn the guar of ATD unit clockwise view from right side...

  • Page 31: Replacing Upper And Lower Shaft Timing Belt

    17. Replaceing upper and lower shaft timing belt To remove To replace 1. Remove upper and lower shaft timing belt 4. Belt tension Correct flexibility is 4 mm when 100g pressure at centre of timing belt 1-2 Losen tension pully 1-3 Remove upper and 100g...

  • Page 32: Replacing Motor Timing Belt

    18. Replacing motor timing belt To remove To replace 1. Remove upper and lower shaft timing belt 3. Replace upper and lower shaft timing belt See page 29, 17. Replacing upper and See page 29, 17. Replacing upper and lower shaft timing belt lower shaft timing belt 2.

  • Page 33: Replacing Needle Bar Unit

    19. Replacing needle bar unit To replace To remove 1. Remove needle(s) and Pressur foot 11. Replace needle(s) and Pressur foot 2. Disengage the upper looper by changing 10. Engage the upper looper by changing the upper looper positioning knob to the the upper looper positioning knob to "DOWN"...
  • Page 34 19. Replacing needle bar unit To remove To replace 6. Connect thickness sensor cable and 5. Disconnect thickness sensor cable thickness sensor cam from thickness sensor cam 5. Replace needle bar main driving arm shaft Tighten screw Slightly push 6. Remove needle bar link and needle 4.
  • Page 35 19. Replacing needle bar unit To remove To replace 7. Turn handwheel, bring screw of chain 2. Tighten two screws with positioning needle thread take-up driving cam at collars first, then tighten other two 12 O'clock position screws Then, Remove four screws Caution: Screw at 12 O'clock Tighten two screws first Losen four screws...

  • Page 36: Replacing Cutting Knife Unit

    20. Replacing cutting knife unit To replace To remove 2. Remove connector 11. Re-connect connector Caution : Wiring Hook wire into wire holder Screw hole Good 10. Remove arm bed support plate 3. Remove arm bed support plate Remove two screws...
  • Page 37 20. Replacing cutting knife unit To replace To remove Remove two screws This screw meets shaft flat Losen two screws Remove screw, spacer and nut...
  • Page 38 20. Replacing cutting knife unit To remove To replace 7. Disconnect stitch length adjusting 6. Connect stitch length adjusting link link from positioning ratchet and positioning ratchet Remove screw and spacer 8. For easy remove cutting knife unit, lift 5. Replace feed dog unit feed dog unit up Lift feed dog unit up Remove spring...
  • Page 39 20. Replacing cutting knife unit To remove To replace 10. Remove screws of cutting knife unit base 3. Replace screws of cutting knife unit base Remove three screws Two screws tighten first 11. Remove micro switch base step1 Lift feed dog unit up 2.

  • Page 40: Adjust Timing Of Atd Unit

    21. Adjust timing of ATD unit 1. Remove face cover, belt cover, rear 5. Tighten screw of left side ATD driving cover and handle gear See page 3, 3. Construction Covers Turn shaft towards you and tighten screw of left side gear 2.

  • Page 41: Adjusting Chain Needle Thread Take-Up

    22. Adjusting chain needle thread take-up Timing Position 1. Remove arm cover, face cover, rear 1. Attach C-1 chain needle cover and needle plate Turn hand wheel and bring chain needle thread take-up at the bottom See page 3, 3. Construction Covers 2.

  • Page 42: Adjusting Needle Height

    23. Adjusting needle height To remove To replace 1. Remove needle(s) and Presser foot 5. Replace needle(s) and Presser foot 2. Disengage the upper looper by changing 4. Engage the upper looper by changing the upper looper positioning knob to the the upper looper positioning knob to the "DOWN"...
  • Page 43 23. Adjusting needle height Adjusting needle hight 1. Loosen needle bar fixing screw 2. Turn handwheel, bring needle bar at the bottom Pull needle bar down to needle plate and slightly tighten needle bar fixing screw 3. Remove neelde plate Loosen needle bar fixing screw and turn needle bar to make zero gap between left needle and tip of lower looper with keeping same hightness...

  • Page 44: Adjusting Tension Release Of Atd Unit

    24. Adjusting tension release of ATD unit 1. Remove face cover, belt cover, rear cover and handle See page 3, 3. Construction Covers 2. Loosen screw and adjust position of tension release unit Caution: For easy to see, ATD unit is removed Loosen screw This part push disk release...

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