−38 −
9
8
Adjustment Procedures Results of Improper Adjustment
!0
2 Adjustment of avoid
Loosen the screw 9 and nut 8 of the looper cam guide !0.
Then move the screw 9 back and forth to adjust. (Use a 3/8"
spanner for 8.)
(Caution) After the adjustment, check again the clearance
between the blade point of the looper and the
groove of the needle.
Use a 1/8" hexagonal wrench for the setscrew 6.
Amount of avoid small
Amount of avoid large
Needle Path of looper
Avoid large
Avoid small
1 Adjustment of looper path
Left needle
Right needle
Position of D-C
™ If the engraved line E is turned
more than 3 mm from D, the
looper path is left downward.
The damage of the blade point
of the looper and needle
breakage occur.
™ If the amount of avoid is large,
the clearance between the
needle and the back of the
looper becomes large. In this
case, skipping stitch and
tangling stitch occur.
™ If the amount of avoid is small,
the hitting of the needle and the
back of the looper becomes
strong. In this case, the damage
of the needle top, needle
breakage and scratch on the
back of the looper occur.
Old type
Looper path
shifting cam
Looper path
shifting cam
3 mm (Standard)
Engrared
line E
Engrared
line D
Engrared
line C
Setscrew
Setscrew
From the library of: Diamond Needle Corp
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