UnionSpecial 56500R, Инструкции по настройке

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10
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS
Insert looper into the looper rocker, pushing it all the way down and tighten screw against f lat on shank
of looper. Turn handwheel in operating direction until the point of the looper (A, Fig. 4) moving to the
left, is even with the left side of the right needle (B). Note the height of the eye of the needle with
respect to the looper point (See Fig. 5) . Turn the handwheel in the reverse direction until the point of
looper, again moving to the left, is even with the left side of right needle (See Fig. 5). If the height of the
eye of the needle with respect to the looper point are the same, looper and needle motions are
synchronized. A variation of .005 inch (.127 mm) is allowable. 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. 5 is for final setting of needle bar height.
Adjust the looper drive rocker lever shaft as-follows:
Loosen screw (C, Fig. 4) in looper drive lever (D). A rod of .146-40 thread or Union Special Screw No.
22870A 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. Loosen lock nut (F) and torque thrust adjusting
screw (E) to 6 in. lbs. (7cm/kg); retighten lock nut (F) securely.