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16) Centering adjustment of corner knife
1. The center of corner knife movement is required to coincide with the
needle center.
2. This adjustment has been already finished at the time of shipment
from the factory. However, in such a case when the corner knife unit
is moved for reasons of external shocks or others, some adjustments
are needed in the steps described below so that deviation from the
needle center can be kept within 0 ± 0.5mm even when the moving
corner knife is moved by about 220mm.
(1) Loosen the fixing screws and , fix the corner knife unit with the
toggle clamp , and adjust the frame bracket so that the center
of corner knife movement is maintained in parallel to the needle
center. (Fine adjustments can be made by loosening the lock nut
and shifting the adjusting screw forward and backward.)
(2) Shift the guide plate to make the positioning pin enter the hole
and tighten the fixing screw .
(3) Loosen the fixing screw and make adjustments by shifting the
switch bracket so that the corner knife unit opening sensor switch
can detect the presence of opening.
17) Adjustment of corner knife right and left bends
1. The corner knife shall be adjusted so that it cuts the center of the
sewing line and that the thread is not cut off.
If "16) Centering adjustment of corner knife" has been duly finished,
the corner knife may be mounted to make fine adjustments.
o If the corner knife is deflected to
the right or left, or fastened in a
bent posture, malfunction as illus-
trated may occur.
Adjustment Procedures Results of Improper Adjustment
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