JUKI LU-2810 Series - Page 43

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Adjustment procedures Results of Improper adjustment
1) Position of the counter knife and the clamp spring
[Position of the counter knife]
1. Loosen setscrews
1
of the counter knife.
2. Press the edge of counter knife
3
against the step difference
of counter knife base
2
.
3. Adjust so that the distance from mounting groove of the slide
plate to top end of the counter knife
3
is 37 ± 0.1 mm (A).
4. Tighten setscrews
1
of the counter knife.
[Position of the clamp spring]
1. Loosen setscrews
4
of the clamp spring.
2. Press the edge of clamp spring
5
against the step difference
of counter knife base
2
.
3. Slide the clamp spring
5
while making it press against the step
difference of the counter knife base
2
, and adjust the distance
to 3.7 ± 0.1 mm (B).
4. Tighten setscrews
4
of the clamp spring.
(Caution) When the position of counter knife
3
and clamp
spring
5
is moved, re-adjust the position of counter
knife base
2
and the knife pressure.
When dimension A is larger :
o
Length of bobbin thread clamp
is shortened and stitch skipping
occurs.
o
Setting/taking out bobbin cannot
be performed.
When dimension A is smaller :
o
Thread trimming failure will be
caused.
When dimension B is larger :
o
Bobbin thread clamp failure oc-
curs.
o
Stitch skipping at the start of
sewing will be caused.
When dimension B is smaller :
o
It is difcult to take out cloth
since needle thread have been
clamped, and the trouble that
bobbin thread clamp is simulta-
neously removed will be caused.
o
Clamp spring interferes with the
rear edge of moving knife. As
a result, deformation of clamp
spring or the like occurs.
海外講習会用121122LU-2810(-7)EM