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Adjustment procedures
Results of Improper adjustment
4) Thread trimmer cam timing
1. Loosen setscrews
6
of the thread trimmer cam.
2. Move the moving knife
1
to most advanced position.
3. Turn the handwheel
2
in the state of step 2. to two marker
dots
A
on the handwheel
2
aligns with marker line
B
on the
motor cover
3
.
4. Make the thread trimmer cam
4
come in close contact with the
lower shaft set collar
5
, then tighten setscrews
6
of the thread
trimmer cam.
(Caution) Check that the edge of thread trimmer cam
4
comes
in close contact with the edge of lower shaft set col-
lar
5
.
When thread trimming timing is
retarded :
o
Thread trimming action does not
complete even at the needle-
up stop position. As a result,
defective thread trimming will be
caused.
When thread trimming timing is
advanced :
o
Defective thread trimming will be
caused.
o
Length of thread remaining on
the needle after thread trimming
cannot be secured. As a result,
needle thread may slip off after
thread trimming or at the start of
sewing.
o
Stitch skipping at the start of
sewing will be caused.
海外講習会用121122LU-2810(-7)EM
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