STANDARD ADJUSTMENTS [2]
[Clearance between the rotary hook and needle plate]
• Loosen setscrews 8 and adjust the clearance between rotary hook 8 and needle plate 0
to
0.6
to
0.9 mm by moving rotary hook 8 vertically.
[Needle bar lift stroke and needle bar height]
1.
1
1 to 1.5 mm
iOi
2.4mm
If
Needle bar lift stroke
1.
Loosen setscrews e and turn rotary hook 8 so as to adjust the rotary hook point
to
align with the
needle center when the needle rises 2.4 mm from its lowermost point.
Needle bar height
1.
Loosen setscrew 0 and move the needle bar vertically so as
to
adjust the clearance between the
needle hole
top
and the rotary hook point
to
1 to
1.5
mm when the rotary hook point
Is
aligned with
the needle hole center.
[Clearance between the rotary hook and bobbin case opener]
-36-
• Loosen bolts G and move bobbin case
opener
0 sideways
to
adjust the clearance
between rotary hook
8 and bobbin case
opener
0
to
0.2 mm when bobbin case
opener
0 pulled fully over
in
the arrowed
direction.
To Next Page
Need help?
General
