3.18
Needle to
Rotating
Hook Relation
Adjustment
Figure 23
If the clearance
is too small, the
rotating hook points
will wear out, and
too big, it will cause
the skip stitch.
When replacing the
rotating hook, it
should be using the
original one.
Precaution
Adjusting the height of the needle
bar
Turn the hand wheel until the needle
bar '2' has been at the lowest point,
loosen the setscrew '1'.
The line 'A' on the needle bar '2'
align with the bottom end of needle
bar lower bushing '3', then securely
tighten the setscrew '1'.
Adjusting the position of the rotat-
ing hook
Loosen two rotating hook setscrews
and turn the hand wheel until the
line 'B' on needle bar align with the
bottom end of needle bar lower
bushing '3'.
After the above adjustments steps,
the rotating hook point '5' aligns
with the center of needle '4'(a) , and
make sure the clearance between
the needle and the rotating hook '5'
is 0.04~0.1 mm (b).
1
Center of needle
0.04~0.1mm
5
(a)
(b)
15
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Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine
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