Brother International RH-981A Instruction Manual - English - Page 74

Adjusting the gimp length after trimming (-02, -52 specifications)

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9. STANDARD ADJUSTMENTS The lower thread and gimp should be trimmed at the correct time after the work clamps rise at the feed home position. Thread trimming operation can be checked in steps while manual mode is active. (Refer to "7-8. Using manual mode".) 1. The mechanism is adjusted so that the lower thread and gimp are spread by the thread handler (1). 2. The movable knife driving cam (2) operates, and the right movable knife (3) and left movable knife (4) mesh and the thread is cut. 3104Q 9-18. Adjusting the gimp length after trimming (-02, -52 specifications) Approx. 4 mm 3105Q Adjust so that approximately 4 mm of the gimp thread is coming out from the throat plate (1). 1. Loosen the screw (2) and move the gimp thread guide J (3) in the direction of the arrow to adjust the length. Becomes shorter Becomes longer 9-19. Lower thread presser (-02, -52 specifications) The lower thread presser (1) operates at the same time as upper thread trimming is carried out. The end of the lower thread is securely held between the lower thread presser (1) and the throat plate (2). 3106Q RH-981A 67

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9. STANDARD ADJUSTMENTS
RH-981A
67
<-02,-52>
The lower thread and gimp should be trimmed at the correct time after the work clamps rise at the feed home
position.
Thread trimming operation can be checked in steps while manual mode is active.
(Refer to “7-8. Using manual
mode”.)
1. The mechanism is adjusted so that the lower thread
and gimp are spread by the thread handler (1).
2. The movable knife driving cam (2) operates, and the
right movable knife (3) and left movable knife (4)
mesh and the thread is cut.
9-18. Adjusting the gimp length after trimming
(-02, -52 specifications)
Adjust so that approximately 4 mm of the gimp thread
is coming out from the throat plate (1).
1. Loosen the screw (2) and move the gimp thread
guide J (3) in the direction of the arrow to adjust the
length.
9-19. Lower thread presser (-02, -52 specifications)
The lower thread presser (1) operates at the same
time as upper thread trimming is carried out.
The end of the lower thread is securely held between
the lower thread presser (1) and the throat plate (2).
3104Q
3105Q
Becomes longer
Becomes shorter
Approx. 4 mm
3106Q