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BE-1204B-BC • BE-1206B-BC 12-3
Chapter 12 Troubleshooting
Problem Check point
! Upper shaft locks at a certain
point in one cycle
• Is the thread take-up stopped due to interference with the thread
take-up cover?
[Adjustment]
W1326Q
Loosen the hexagon socket head cap screw of the thread take-
up operating lever and adjust the take-up movable range.
Tighten it securely afterwards.
• Are the needle bar clamp and the top dead center stopper
positioned correctly?
Check these points once again
! Stitches cannot be made. • Is the needle attached properly?
• Is the timing of the needle and rotary hook correct?
Thread take-up
Thread take-up cover
Bolt
Thread take-up
operating lever