12
MECHANICAL ADJUSTMENT
NEEDLE CLEARANCE TO HOOK
The clearance between needle and rotary hook should be -0.10 to + 0.05 mm. If not, make
an adjustment as follows:
1.
Set the pattern selector dial at maximum zigzag stitch width.
2.
Remove the setscrew on the needle plate, and detach the needle plate and bobbin
holder.
3.
Remove the bed cover (see page 3).
4.
Loosen screws (B) and (C) and tighten screw (A) temporarily.
5.
Replace the needle with the test pin. Turn the hand wheel toward you slowly by hand
until the needle bar reaches its lowest position.
The clearance between the needle and the point of the rotary hook should be between
-0.10 and +0.05 mm.
6.
Tighten set screws (A), (B) and (C).
7.
Check the backlash play (see page 13).
8.
Attach the bed cover, bobbin holder, needle plate and bed cover.
9.
Remove the test pin.
Summary of Contents for JEM GOLD 660
Page 1: ...SERVICING MANUAL JEM GOLD 660...
Page 19: ...18...
