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q
t
2.6–3.0 mm
r
e
0.1–0.3 mm
e
w
9. Back Needle Guard Height
The upper edge of the back needle guard should be
2.6–3.0 mm below the lower edge of the looper point
when the looper point meets with the right side of the
needle.
z Remove the free arm cover and needle plate.
x Turn the handwheel toward you until the looper
point q matches with the right side of the needle.
0–0.05 mm
c Loosen the setscrews w and move the back needle
guard e up or down to set the upper edge r 2.8 mm
below the lower edge t of the looper point.
v Turn the handwheel toward you slightly to bring the
looper point behind the needle.
Check the clearance between the back needle guard
and the needle (Schmetz ELx705, size 80/12).
It should be 0.1–0.3 mm.
NOTE:
If the clearance is out of standard range, adjust it by
re-positioning the front needle guard. However, the
clearance between the looper point and needle
should be 0–0.05 mm.
b Tighten the setscrews w.
n Attach the needle plate and free arm cover.
14
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