SINGER 1375A3 User Manual
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b. The thread tension disc (2) is too ti^t or the thread tension disc (1) opens too late
(cause breakage of striding thread).
c. The thread at thread-feed-lever crooks.
d. Hook has scars or burrs.
e. The needle guard or the hole of the throat plate has been scratched.
f. Thread breaks occasionally due to low threading on the faceplate.
a. The distance of thread hooking is too long or too short, or the needle bar is not at
the proper height.
b. The clearance between the needle and looper or between the needle and the needle
guard is too big.
The button clamp is improperly installed, the needle doesn't fall in the center of
holes in the button.
d. The button clamp doesn't hold the material down on the feed plate firmly, the
material moves up or down with the needle.
The needle is bent, or doesn't fall in the center of holes in the button, or has not
been inserted completely.
f. The needle impacts with the hole of the feed plate.
g. Excessive worn parts or damaged hook.
4. Stitch is too loose.
a. The tension of the thread tension disc (2) is too weak.
b. Releasing of the thread tension disc (1) is too early.
5.Stitch is vacant at the beginning of sewing.
a. The thread end is too short, the amount of the thread feed by the thread-feed-lever
should be increased, but the thread-feed at the starting should avoid the forming or
b. Thread trimmer cuts a thread at the outside.
c. The opening of the thread tension disc (4) is not wide enough.
6.The thread won't be trimmed properly.
a. The trimmer is too dull.
b. The timing of thread trimming is incorrect.