4-22-5.Adjusting The Thread Guide Plate; Thread Required For Thread Trimming - Brother RH-981A Service Manual

4. ADJUSTMENT
4-22-5. Adjusting the thread guide plate
Should
align
4-22-6. Adjusting the amount to pull the lower thread required for thread trimming
When the thread handler catches the lower thread to guide it to the fixed knife, the lower thread should be pulled
sufficiently to prevent the thread snapping and deviation from stitching path.
To cut the lower thread when the feed bracket is at the home position, the thread trimmer lever bracket will continue
to operate just before the looper turns 45
67
When the movable knife (1) moves, the lower thread
and the gimp should be guided to the notches in the
movable knife (1). Adjust the position of the thread
guide plate (2) so that the end of the movable knife (1)
aligns with the end of the thread guide plate (2).
3809Q
o
, and the lower thread will be pulled.
Loosen the screw (1), turn the tension release plate (2)
to adjust clearance a between the tension release plate
(2) and thread trimmer lever bracket (3).
Note:
3810Q
RH-981A
If the lower thread has snapped, reconfirm "6-1-1.
Adjusting the solenoid valve speed controllers".