Adjustment Of Auto Tension - Brother BL6200 Service Manual

13. ADJUSTMENT OF AUTO TENSION (B341 ⋅ B349 ⋅ B351 ⋅ B352)
(ADJUSTMENT OF ROLLER FOR THREAD TENSION CONTROL)
STANDARD
Thread polyester thread #60 between roller and thread holder.
Turn the pully counterclockwise. The thread should be locked when the top of the needle eye comes down 0
~ 1.5 mm down from the surface of needle plate.
(Remove presser foot and lower presser foot bar.)
ADJUSTMENT
1. Set pattern dial to straight stitch and lower the presser foot after threading polyester thread #60 properly.
2. Turn the pulley counterclockwise and adjust needle position at the top of needle eye 0 ~ 1.5 mm down
from the surface of needle plate.
3. Loosen the screw for roller adjusting shaft.
4. Turn the roller adjusting shaft by screw driver and adjust the roller position in between lock and release
condition with drawing thread.
(Adjust the roller so it is within one cycle of the roller adjusting shaft.)
5. Tighten the screw.
NOTE
Turn the pulley counterclockwise 2 ~ 3 times. Check if the roller should lock thread when top of needle eye 0
~ 1.5 mm down from the surface of needle plate. Also check if thread tension is proper on 2 pcs of broad with
needle #14(No. 90), polyester thread #60.
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