–
30
–
Standard Adjustment
Results of lmproper Adjustment
4. Remove the bed top cover.
Loosen two setscrews
8
in rear needle guard cam
5
and adjust
the timing.
When moving the cam in + direction, timing is advanced, and when
moving in – direction, it is retarded.
2. Loosen setscrew
!0
in the front needle guard and adjust the
clearance.
Adjust so that the clearance provided between the needle and front
needle guard
9
is 0.1 to 0.3 mm when looper
3
moves from the
extreme right position to the left and passes the rear side of the
respective needles and fix the front needle guard with setscrew
!0
.
*
Place front needle guard
9
as near as the needle to such an extent
that needle thread passes smoothly in accordance with kind and
thickness of thread.
Pulley side
™
The cam is excessively changed from
t h e s t a n d a r d p o s i t i o n , n e e d l e
breakage or stitch skipping will be
caused.
™
When the front needle guard and the
needle come excessively near, stitch
skipping or needle breakage will be
caused.
8
(Caution)
Check by manual turning whether the needle is pinched
with front needle guard
9
and the rear needle guard.
–
+
3
9
!0
