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Adjustment Procedures Results of Improper Adjustment
™ Incorrect adjustment could
cause breakage of spreader,
defect of top cover thread
trimming or thread breakage of
top cover thread during sewing.
™ Loosen the 2 screws %3. Move the holder %4 so that the movable
knife %1 can come to the center in V-shaped slot of spreader.
™ Loosen the nut %5 . Make adjustment by turning the rod %6
such that the pointed end of movable knife coincides with the
pointed end of stationary knife ( ±0.5 mm) when the movable
knife is closed, and the movable knife catches and cuts the
top cover thread when opened. When the movable knife and
stationary knife is found not to be well engaged, loosen the 2
screws %8 and adjust the stationary knife %9 .
™ Adjust the retaining pressure by the screw %7 so that the top
cover thread is clamped after thread trimming. (An appropriate
pressure may be such that the clamp spring is 1/2 turned after
contacting the stationary knife.)
In case of the pneumatic type
™ Set the air pressure of moving knife ^0 to “0” and adjust the
knife so that it cuts the thread retained by spreader ^2.
™ The trimmer activates and the hook of moving knife ^0 picks
up the thread from the underside where the thread goes from
spreader ^2 to the stitch side.
™ Loosen screws ^3 and ^4 and adjust so that the bottom of
moving knife ^0 should be 1.5 to 2 mm above the top surface
of presser foot &0 when moving knife ^0 is opened to the
maximum.
™ Loosen screw ^6 and adjust so that the clearance between
the top end of moving knife ^0 and the left side of the left needle
^1 should be 0.4 to 0.8 mm. In addition, loosen screw ^5 and
adjust so that the clearance between the top end of moving
knife ^0 and spreader ^2 should be 0.2 to 0.4 mm. Loosen
screws ^3 and ^4 and adjust the angle of moving knife ^0 so
that it should pick up the thread retained by spreader ^2.
™ When the adjustment of the trimmer is completed, do not
remove collar setscrews ^4 since collar ^8 holds the adjusted
position of the trimmer.
™ When removing the trimmer unit since the trimmer is not used,
loosen screw ^3 and lift the main body ^0 while turning it and
there is a position where the unit is drawn. When installing the
unit, adjust the groove of collar ^8 to pin ^7 on the installing
base and tighten screw ^3 to place it to the home position.
™ Similarly adjust the solenoid type needle thread trimmer.
(Caution) Adjust so that the presser foot does not interfere
with the trimmer.
From the library of: Diamond Needle Corp
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