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(7) Adjusting the rising amount of the thread tension disk
Widen
Narrow
1
2
3
4
(8) The moving knife and counter knife
2
0.5 mm
5
5
Throat plate
4
3
18.5 mm
1
1) Remove the top cover. Make sure that tension
release pin 3 rides on tension release notch 4.
2) If the pin does not ride on the notch, push cam
follower 5 by hand to the e direction, and rotate
the main shaft in the correct direction to make a
state as illustrated in the figure.
3) Under the state as illustrated in the figure, loosen
setscrew 2 in the tension release adjusting arm.
By moving tension release adjusting arm 1 to the
left or right, the rising amount of the thread tension
disk will change.
S type : 0.6 to 0.8 mm
H type : 0.8 to 1.0 mm
(Caution) If the rising amount is insufficient, the
length of the remaining thread after
thread trimming will be not stable. If the
rising amount is excessive, after
releasing the rising of the thread tension
disk, the disk closing will be defective.
1) Loosen adjusting screw 3 so that a clearance of
18.5 mm is provided between the front end of the
throat plate and the top end of thread trimmer
lever, small 1. To adjust, move the moving knife
in the direction of arrow.
2) Loosen setscrews 5 so that a clearance of 0.5
mm is provided between needle hole guide 2 and
counter knife 4. To adjust, move the counter knife.
20
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