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HOW TO USE
J Installation of the movable knife
1 . Initial position of the movable knife
( 1 ) Turn the pulley and stop it at the position where the needle comes to the lowest.
( 2 ) Put the cam roller into the thread trimmer cam groove by pushing the cam follower crank.
( 3 ) In this condition, turn the pulley and stop it at the position where the black mark point on the
arm meets the white mark point on the pulley.
Set the cam follower crank at this position with a screwdriver temporarily preventing the cam
roller coming out from the cam groove.
( 4 ) Loosen bolts Ⓐ and Ⓑ.
( 5 ) Adjust so that the tip slant portion of the movable knife protrudes 0 to 0.5 mm from the fixed
knife, as shown in the figure and tighten bolts Ⓐ and Ⓑ.
Bolt Ⓐ
Thread trimmer
rocking crank
2 . Gap between the movable knife and the lug of
inner hook
( 1 ) Turn the pulley and stop it at the position
where the needle comes to the lowest.
( 2 ) While pushing the cam follower crank, turn
the pulley and stop it at the position where
the movable knife move to the position as
shown in the figure.
( 3 ) Turn the inner hook and adjust so that the
gap between the movable knife and the
lug of inner hook is about 0.5 mm (screws
Ⓐ and Ⓑ should be loosened for this
adjustment).
Pitman rod
Bolt Ⓑ
Thread trimmer rocking crank
— 15 —
0 to 0.5 mm
Cam follower crank
Cam roller
Thread trimmer cam
Movable knife
Lug of inner hook
Approx. 0.5 mm
Movable knife
Fixed knife
Screw Ⓐ
Screw Ⓑ
Inner hook
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