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S-7200C
10. ADJUSTMENTS
129
１０-１８. Adjusting the tension release wire
If the tension discs remain open or if the upper thread pulls
out from the needle hole after thread trimming, carry out the
following adjustment.
* Lower the presser foot before carrying out the adjustment.
A. If the upper thread pulls out of the needle hole
(The tension release wire is not operating enough
during thread trimming.)
・
When the plunger (1) of the thread trimming solenoid
is pushed 3 to 4 mm, the tension discs (2) start to
open, and when it is pushed as far as it will go, the
tension discs (2) should always be open.
・
When the plunger (1) is released, the tension discs (2)
close.
1. Loosen the nuts (3) and (4), and then push the plunger
(1) of the thread trimming solenoid 3 to 4 mm.
2. Tighten the nut (3) [left side] until the tension discs (2)
start to open.
3. Check that the tension discs (2) open when the plunger
(1) is pushed as far as it will go, and that the tension
discs (2) close when the plunger (1) is released.
4. Tighten the nut (4) [right side].
B. If the tension discs remain open
1. Check that the solenoid lever (5) has returned.
2. Check that the tension release wire (6) is not being
stretched.
3. Use nuts (3) and (4) to adjust as described in A above.
* If adjustment is not possible, adjust the tension of the
tension release wire (6).
4369M
4370M
Opened
Start of opening