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(A)
(B)
(A) Adjust the lowerlooper thread through-feed and lowerlooper
1. Loosen set screw A and align the top surface of the lowerlooper thread through-feed with the top
surface of the lowerlooper.
2. Firmly tighten set screw A .
NOTE: Incorrectly setting the timing causes the lowerlooper thread through-feed to rub against the feed dogs
causing the lowerlooper thread through-feed knob to operate incorrectly.
(B) Adjust the needle and lowerlooper
1. When the needle is raised to 2.2 ~ 2.6 mm above its lowest position, place the pointed end of the
lowerlooper against the right side of the needle. The point of the lowerlooper should be between 0 ~
0.05 mm from the needle.
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