JUKI LH-4500C Series Instruction Manual page 113

LH-4588C
❼
❺
❻
❹
・ Adjust the relation between the needle
and the hook as described below:
1) Place the sewing machine in the hook timing
adjustment mode.
2) Set the feed pitch to 3.00 for the G type mod-
el.
Standard adjustment is obtained when the
needle bar goes up 2.2 mm from its lowest
point (at this time, the lower marker line on
the needle bar is aligned with the lower end
of needle bar frame), the blade point of hook
aligns with the center of needle and the upper
end of needle eyelet is spaced 1.2 mm from
the blade point of hook.
3) If the standard value cannot be obtained, re-
move needle clamp screw ❺ , rotate needle
clamp ❹ by one turn (adjustment amount:
0.6 mm). Or, remove spring shoe setscrew ❼
and rotate spring shoe ❻ a half-turn (adjust-
ment amount: 0.3 mm)
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