Brother International RH-9800 Instruction Manual - English - Page 59

Adjusting the trimming of the upper thread

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9. STANDARD ADJUSTMENTS 9-15. Adjusting the trimming of the upper thread The upper thread should be trimmed at the correct time after sewing is completed. 1. Adjust so that the upper thread trimmer knife (1) cuts only one of the threads in front of the right looper (2). Note: If both strands of the thread loop are cut, the thread remaining in the needle may become too short and skipped stitches may result. (1) (2) 0980Q 1. Adjust so that the upper thread trimmer knife (3) cut only one of the threads in front of the right looper (4). Note: If both strands of the thread loop (forward and back) are cut, the thread remaining in the needle may become too short and skipped stitches may result. (3) (4) 0981Q 9-16. Adjusting the trimming of the lower thread and gimp The lower thread and gimp should be trimmed at the correct time after the feed bracket has returned to the home position. Thread trimming operation can be checked in steps while manual mode is active. (Refer to "Using manual mode" on page 39.) (6) (6) (7) (1) (4) (4) (8) (2) (2) (3) (3) (5) (7) 0982Q 0983Q 1. The mechanism is adjusted so that the lower thread and gimp are separated from each other and spread by the loop spreader (1). 2. The lower thread is held between thread nipper M (2) and thread nipper D (3) on the plate spring. The gimp is held between thread nipper M (2) and thread nipper U (4) on the plate spring. 3. Adjust so that the edge of the fixed knife (6) and the index mark (8) on the movable knife (7) are aligned when the thread trimmer knife arm (5) is at the maximum stroke. RH-9800 53

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9.
STANDARD ADJUSTMENTS
RH-9800
53
9-15. Adjusting the trimming of the upper thread
The upper thread should be trimmed at the correct time after sewing is completed.
<-00, -01>
1.
Adjust so that the upper thread trimmer knife (1) cuts
only one of the threads in front of the right looper (2).
Note:
If both strands of the thread loop are cut, the
thread remaining in the needle may become
too short and skipped stitches may result.
<-02>
1.
Adjust so that the upper thread trimmer knife (3) cut
only one of the threads in front of the right looper (4).
Note:
If both strands of the thread loop (forward and
back) are cut, the thread remaining in the
needle may become too short and skipped
stitches may result.
9-16. Adjusting the trimming of the lower thread and gimp
<-00, -01>
The lower thread and gimp should be trimmed at the correct time after the feed bracket has returned to the home position.
Thread trimming operation can be checked in steps while manual mode is active.
(Refer to “Using manual mode” on page 39.)
1. The mechanism is adjusted so that the lower thread and gimp are separated from each other and spread by the loop
spreader (1).
2. The lower thread is held between thread nipper M (2) and thread nipper D (3) on the plate spring.
The gimp is held between thread nipper M (2) and thread nipper U (4) on the plate spring.
3. Adjust so that the edge of the fixed knife (6) and the index mark (8) on the movable knife (7) are aligned when the
thread trimmer knife arm (5) is at the maximum stroke.
(2)
(1)
(3)
(4)
0980Q
0981Q
(6)
(1)
(7)
(4)
(2)
(3)
(7)
0983Q
0982Q
(5)
(4)
(2)
(3)
(6)
(8)