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7
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TIMING OF THE RETAINER LOOPER
7-1 Installing the retainer looper
Install retainer looper A with its flat surface turned
upward. There should be a clearance of 0.6~0.7mm
between the needle and the point of the retainer looper.
After this adjustment, tighten screw B.
7-2 Timing of the retainer looper to the needle
When the looper's eye is close to the point of the retainer looper while the needle bar is
ascending to the top of its stroke, there should be a clearance of 0.3mm between the right
side of the retainer looper and that of the looper. When the needle bar is at the top of its
stroke, there should be a clearance of 0mm between the right side of the retainer looper
and that of the top surface (heel) of the looper blade.
■
In case of UTC, When the retainer looper are located at the right end of its stroke, there
should be on the same line with the right side of the retainer looper and the right side of
looper’s base.
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8
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ADJUSTING THE NEEDLE GUARD
8-1 Position of the needle guard
When the right side of the needle is the closest to
needle guard A, there should be a clearance of
0~0.1mm between them.
Adjustment is made by loosening screw B.
< Note >
For a standard type of needle guard, loosen the looper
set screw after positioning the looper rocker, adjust the
needle guard and then tighten screw B.
12
