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Adjustment Procedures Results of Improper Adjustment
Adjustment Procedures Results of Improper Adjustment
1
2
4
3
The amount of oil in the hook can be adjusted with oil amount
adjusting screw 1.
1) Adjusting procedure
Turning (clockwise) oil amount adjusting screw 1 increases
the oil amount in the hook and turning (counterclockwise) it
decreases the oil amount in the hook.
™ Move moving knife 2 forward until it will go no further (by
approximately 39 mm) and confirm that the end of slide plate
3 is spaced 34 ± 0.5 mm from the top of the moving knife.
™ Adjust the opersting pressure of counter knife 1 and moving
knife 2 by tightening screw 5 in clamp plate 4 .
At this time, the force to move moving knife pin 6 in the direction
of the arrow is more or less than 600 gf.
™ If screw 5 is excessively loose, defective thread trimming may
occur.
™ When the moving knife is properly positioned :
™ When the moving knife is positioned
in the front :
1) In the case where the needle
thread is trimmed twice :
™ When the moving knife is positioned
in the rear :
2) In the case where the needle
thread is not trimmed :
How to solve the aforementioned
troubles
1) In the case where the needle
thread is trimmed twice :
Slightly loosen screws 1 to 4,
and slant the knife base in the
direction A. Then tighten screws
1 to 4.
2) In the case where the thread is not
trimmed :
Slightly loosen screws 1 to 4,
and slant the knife base in the
direction B. Then tighten screws
1 to 4.
Needle eyelet
Needle eyelet
A
B
Knife base
Needle thread on
the material side
Bobbin
thread
Needle eyelet
Needle thread on
the needle side
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