Related Manuals for Baby Lock EUPHORIA BLC4
Summary of Contents for Baby Lock EUPHORIA BLC4
- Page 1 SERVICE MANUAL MODEL BLC4 The chain looper timing has been changed in V.2.0. Applicable machine number: All BLC4 Ver2.0 FEB.2021...
- Page 2 1. Adjustment of Needle, Chain looper & Presser foot All adjustments are done by Organ needle ELx705CF #90 Adjusting each gap Gap 0 0.3 ~ 0.4 Chain looper needle guard Front and rear needle guard Gap 0.02 ~ 0.15 Height of needle When passing a chain looper When chain looper does not pass From the right side...
- Page 3 2. Construction of covers...
- Page 4 3. How to remove and attach the covers 1. Remove the 2 screws of spool stand. 2. Lower the needle threading lever down. 3. Remove the 2 screws of the arm cover. 4. Return the needle threading lever after the arm cover is removed. 5.
- Page 5 3. How to remove and attach the covers 7. Remove the needle thread take-up cover straight up. 8. Remove the face cover set screw. 9. Remove the face cover. 10. Be careful of the tongue on the face cover and front cover when removing.
- Page 6 3. How to remove and attach the covers 11. Remove E ring of the front cover hinge shaft and remove the front cover. Move the hinge to the left side, move the cover to the right side, and remove the cover. 12.
- Page 7 3. How to remove and attach the covers 15. Remove the 2 screws and remove the Front table set. 16. Remove the dial cover set screw and remove the dial cover. 17. Remove the 2 screws. 18. Remove the threading lever seal, remove the threading switching lever set screw, remove the bed cover set screw, and then remove the bed cover.
- Page 8 3. How to remove and attach the covers 19. Be careful of the safety switch cord when removing the front cover. *Attach the cover from the end of the removed procedure (19.→1.). Note the following points when attach. 1. When replacing the front cover, attach the cord as shown in the photo.
- Page 9 4. How to remove and attach the needle threading system unit 1. Pull out presser foot pressure adjustment dial. 2. Remove the 2 screws and remove the needle threading system unit. 3. Be careful of the pressure dial shaft when the needle threading system unit is removed.
- Page 10 5. How to adjust needle threading system position 1. Set the looper and needle threading position. Make sure the pipes are connected. 2. Needle threading positioning cam. 3. Loosen the 2 screws and make the adjustment. (The needle threading system unit is removed so that the adjustment screw can be seen easily.) 4.
- Page 11 6. How to adjust the needle threader hook 1. Set the looper and needle threading position. Make sure the pipes are connected. Adjust the height of the hook with this screw. Use this screw to change the hook and adjust the left and right position of the hook. Make sure that the hook comes out of the needle eye.
- Page 12 7. How to adjust the needle bar height Preparation: Remove the needle threading system unit. 1. Remove the cord band. 2. Loosen the upper screw and remove the lower screw. LED fix base. 3. Slide the LED fixing base, loosen the hexagonal screw of the needle bar, and move the needle bar up and down to adjust the needle bar height.
- Page 13 8. How to remove and attach the needle bar unit Preparation: Remove the needle threading system unit. 1. Remove the thickness sensor wire for needle thread adjustment wire attached to the presser bar. 2. Remove the right LED code. 3. Remove the presser foot lifting arm link set screw. （Be careful, the spacer on the outside of the screw.）...
- Page 14 9. How to remove and attach the upper shaft Preparation: Remove the needle threading system unit and needle bar unit. 1. Remove the 4 screws and remove the handle. 2. Loosen 2 set screws of needle bar driving crank shaft. 3.
- Page 15 9. How to remove and attach the upper shaft Preparation: Remove the Needle threading system unit and Needle bar unit. 6. Loosen tension pulley unit the set screw and remove Tension pulley unit. the upper timing belt. Upper and lower shaft timing belt.
- Page 16 10. How to attach the timing belt 1. Set the dot mark of the upper shaft timing pulley and hand pulley at 12 o'clock position, and attach the timing belt. 2. Correct flexibility is 4mm when the timing belt is pushed with 100g pressure in the middle of belt.
- Page 17 11. How to adjust ATD system Preparation: Remove the handle. 1. Loosen ATD drive gear set screw to separate from ATD drive gear and ATD timing gear 2. Turn the ATD timing gear in the direction of the arrow and advance until the front tension disc closes.
- Page 18 12. How to adjust the height of the feed dog 1. Loosen the feed dog set screw 2. Turning the screw clockwise to lower the feed dog. Turning the screw counterclockwise to raise the feed dog. 0.75~0.80 3. After adjusting the feed dog height, tighten the set screw.
- Page 19 13. How to remove and attach the differential feed unit 1. Remove the needle thread adjusting wire attached to the ATD. 2. Remove the 2 screws of chain looper thread basket receiver set and remove the chain looper thread basket receiver. 3.
- Page 20 13. How to remove and attach the differential feed unit 7. Remove the 2 screws of feed arm shaft support set screws and remove the Feed arm shaft support. 8. Remove E-ring. 9. Loosen the feed rod nut first and then remove the set screw. 10.
- Page 21 13. How to remove and attach the differential feed unit 14. Loosen screw of Differential feed positioning ratchet. 15. Slowly remove the differential feed unit.
- Page 22 13. How to remove and attach the differential feed unit ＊Attach the differential unit from the end of the removed procedure (15.→1.). Note the following points when attach. 1. Attach the left and right positioning of feed dog unit. 2. Attach the drop feed rod and the drop feed block. 3.
- Page 23 14. How to remove and attach the chain looper base 1. Remove the front cover safety device connector and remove the bed cover. 2. Remove the 3 screws and remove the housing of knee lifter unit. (It is easier for working in case the housing of knee lifter unit is removed and the machine is placed in flat.) 3.
- Page 24 14. How to remove and attach the chain looper base 7. Remove the 2 screws and remove the chain looper thread take-up. keep the chain looper thread take-up roller when removed. ＊Be careful not to forget the chain looper thread thake-up roller. 8.
- Page 25 14. How to remove and attach the chain looper base ＊Attach the chain looper base from the end of the removed procedure (8.→1.). Note the following points when attach. 1. When attach the looper base part, be careful to the direction of the chain looper connecting block.
- Page 26 15. How to remove and attach the lower shaft Preparation: Remove the looper base set. 1. Loosen the screw and remove the chain looper set. 2. Remove spring of chain looper driving rod backlash. 3. Remove the 6 screws and remove the feed dog evacuation shaft unit.
- Page 27 15. How to remove and attach the lower shaft 7. Remove the air pump driving rod set screw. (Be careful to the collar when removing the screw) 8. Loosen the 3 screws and remove the chain looper shaft, thrust collar and Chain looper connecting fork. 9.
- Page 28 15. How to remove and attach the lower shaft ＊Attach the lower shaft from the end of the removed procedure (10.→1.). Note the following points when attach. 1. Make sure, that the clutch switching pin is in the groove when the lower shaft is set. 2.
- Page 29 16. How to adjust the needle thread BLC4 settings Sewing style：Triple cover stitch Needle used：ELx705 #90 (Organ) Needle thread tension：0 (AUTO) Thread used：Fujix Polyester #60 Chain looper tension：3 Fabric used : Cotton broad (2 sheets stacked) Stitch length：2.5 1. Make sure that the needle thread floats on C2 are even. C1 C2 C3 2.