9-4
Adjustment
9.03.04
Needle rise, hook clearance, needle height and needle guard on the
GP-724
Requirement
With the needle bar positioned
2.0 mm
after bottom dead centre on
both hooks
：
1. the hook point must be at needle centre with a hook-to-needle
clearance of
0.05
to
0.1 mm
.
2. the top of the needle eye must be
0.8
to
1.0 mm
below the hook
points.
3.
the needle guard
9
must touch the needle lightly.
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