HIGHLEAD GC20618-1DZ, Instruction Manual Parts Catalog

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balance wheel.Set the cam follower crank at this position with a screwdriver temporarily preventing the cam
roller coming out from the cam groove.
（
4
）
Loosen the thread trimmer rocking crank clamp bolts A and B.
（
5
）
Adjust the movable knife so that the movable knife end slant portion protrudes 0-0.5mm from the
fixed knife,as shown in figure and tighten the bolts A and B.
2) Gap between movable knife and bobbin case holder stopper
（
1
）
Turn the balance wheel by hand until needle reaches the lowest position.
（
2
）
With the needle at the lowest position,depress cam follower crank,turn the balance wheel until the
movable knife reaches the extremity of its stroke.
（
3
）
Manually rotate the inner hook in the direction indicated by arrow in figure and adjust gap between
the movable knife and the inner hook stopper to about 0.5mm(the screws A and B should be loosen for this
adjustment).
26.ADJUSTMENT OF THREAD TRIMMER CAM
（
1
）
Turn the balance wheel by hand until the needles reach the lowest position.
（
2
）
Maintaining the needle position,depress the cam follower crank and put the cam roller into the groove
of thread trimmer cam.
（
3
）
Turning the balance wheel by hand,adjust the thread trimmer cam so that the movable knife starts
moving when the green mark point on the balance wheel comes in line with the black mark point on the arm.