3. Position of the moving knife (draw-in position of the moving knife)
Remove the throat plate (needle plate).
A clearance of 0.5 to 1.5 mm should be provided between the moving knife blade and the end face of square
hole in the moving knife guide plate (upper) when lowering the operating lever.
How to adjust
1. As for the left and right stopping positions of the moving knife guide plate, temporarily tighten the screw at
the extreme right front position of the moving knife guide plate. (Secure the clearance of 0.7 mm from the left
end of the feed dog.)
2. Turn OFF the power switch and turn the handwheel in a condition that the operation lever is lowered.
Then slowly return the moving knife.
3. When the blade section of the moving knife has passed the right end of the knife guide plate (upper),
the movement of the moving knife does not change against the movement of handwheel.
At that position, stop turning the handwheel.
4. At that position, check the position and dimension of the moving knife and the knife guide plate. Then loosen
again the screw and make a fine adjustment of the position of the knife guide plate so that dimensions
0.5 to 1 mm (C) and 1.0 mm or less (D) are covered.
4. Adjustment of the knife driving link
(Clearance between the driving link4 roller and the thread trimming cam)
Remove the throat plate
A clearance of 0.5 mm should be provided between the thread trimming cam and the driving roller when the
operating lever is positioned horizontally.
How to check
The moving knife should move (by approximately 0.7 to 1.0 mm) when raising/lowering the presser foot with the
needle bar positioned in the intermediate position of its strike.
How to adjust
Loosen screw in the collar, and adjust the knife driving link by turning the lower eccentric collar.
The eccentric collar should face you.
- 2 3 -
- 2 3 -
- 2 3 -
- 2 3 -
- 2 3 -
j
Screw in the eccentric
collar of knife
j
Knife guide plate (upper)
* The tip the moving knife should not protrude from
the line E of the front rim of moving knife guide plate.
E
C: 0.5 to 1 mm
Moving knife
D: 1.0 mm or less
j
j
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