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– Adjusting allowance in the hook
The hook can move right and left if there is an
allowance in the lower shaft gear. Eliminate the
allowance (gap) by turning the hook clockwise.
Then adjust the timing.
8.2.5) Adjusting gap between needle and
hook point
– Gap between the hook point and the needle
The distance between the needle and the hook
should be 0.1-0.3mm at their closest interface.
– Thread skip
Thread skip occurs due to thread looping or
inadequate balance or gap between the needle
and the hook.
– Adjustment
The closer the hook point is to the needle, the
hook point will be inside the loop and threading
will be more stable.
Hook allowance (gap)
Hook point
0.1~0.3mm
8.2.6) Functions by needle shape
Hole and groove of the needle vary by the size
and type of the needle.
– Front groove
It protects the thread from the friction heat of
the sewing (which can cause thread breaks).
– Back groove
It adjusts the hook timing according to the
needle movement, thus preventing thread
skips.
Back groove
Front groove
Needle eye
1) Prevention of looping is important for stitching. Adjust the hook point as close to the needle
as possible to achieve the perfect thread position.
2) If embroidery state is not good, move the needle slightly to the right.
CAUTION
Summary of Contents for MA-6
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