SYNCHRONIZING LOOPER AND NEEDLE MOTIONS (CONTINUED)
Turn handwheel in the operating direction until the
point of the looper (A, Fig. 4) moving to the left, is
even with the left side of needle (B). Note the
height of the eye of the needle with respect to the
looper point (See Fig. 4A). Turn the handwheel in
the reverse direction until the point of the looper
again moving to the left, is even with the left side
of needle (See Fig. 4A). If the height of the eye of
the needle with respect to the looper point are the
same, looper and needle motions are synchro-
nized - a variation of .005 inch (.127mm) is allow-
able. If the distance from the eye of the needle to
the point of the looper is greater when the
handwheel is turned in the operating direction, the
looper drive lever rocker shaft will have to be
moved slightly towards the rear. Moving the shaft
towards the front acts the reverse.
NOTE:
The 1/64 inch (.4mm) dimension shown in Fig. 4A is
for final setting of needle bar height.
Adjust looper drive rocker lever shaft as follows:
Loosen screw (C, Fig. 4) in looper drive lever (D). A rod of .146-
40 thd. or Union Special Screw No. 99271 can be threaded into
the looper drive lever rocker shaft through the center of thrust
adjusting screw (E). Tap or pull slightly as required to position
shaft for proper synchronization. Tighten screw (C) securely and
remove rod or screw used to position shaft.
Fig 4
Fig 4A
Fig 3B
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