– 108 –
・
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)
LH-4588C
1.2 mm
2.2 mm
❼
❺
❻
❹
Summary of Contents for SC-956
Page 1: ...INSTRUCTION MANUAL LH 4500C Series SC 956...
Page 180: ...175 11 GAUGE PARTS LIST 43 22 TABLE OF EXCHANGING GAUGE PARTS LH 4578C TYPE F LH 4578C F type...
Page 181: ...176 23 TABLE OF EXCHANGING GAUGE PARTS LH 4578C 7 LH 4578C 7...
Page 182: ...177 47 24 TABLE OF EXCHANGING GAUGE PARTS LH 4588C 7 LH 4588C 7...