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Adjustment Procedures Results of Improper Adjustment
1) The correct installing position of counter knife 1 is that the
distance from the center of the needle to the blade tip of counter
knife 1 is 4.5 mm and that the eyelet of moving knife 2 is
positioned so as to pass the center of the blade tip of counter
knife 1.
2) It is the aim that the blade tip of counter knife 1 is positioned
at 0.5 mm above from the installing plane.
3) When counter knife 1 is moved in the direction A as shown in
the figure, the length of remaining needle thread on the needle
after thread trimming will be longer and when it is moved in the
direction B, the length will be reversely shorter.
* When adjusting or replacing counter knife 1, be sure to check
the sharpness and adjust the installing position of counter knife
1.
1) Replacement of moving knife 1 can be performed with ease
by removing moving knife hinge screw 2 only. (Hexagon width
: 6 mm)
2) When moving knife 1 is replaced, check that moving knife 1
smoothly moves after tightening moving knife hinge screw 2.
™ When the position of counter
knife 1 is excessively moved to
side B, thread trimming failure
(slip-off of needle thread at the
start of sewing or the like) may
occur.
Adjustment Procedures Results of Improper Adjustment
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