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3.2 How to reset the safety clutch device (Fig.22)
A. While press down the button on the bed surface with
left hand, turn the hand wheel slowly with right hand in
the direction shown in Fig. 22 (clockwise).
B. When the stopper brakes the hand wheel, more
strength is needed to turn the balance wheel to reset the
safety clutch device.
C. Release the button.
D. So the resetting is OK and put the bobbin into hook.
(See Fig.15)
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3.3 How to adjust the strength on the safety clutch
device (Fig.23)
A. When the white mark of the eccentric pin aims at the
centre of the lower shaft, indicates that the strength on
the safety clutch is the minimum. When the white mark
points outward, the strength is properly increased.
B. For adjusting the strength of it, move the belt and
loosen the set screw of eccentric pin, and turn the
eccentric pin.
C. After adjustment, please tighten the set screw.
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3.4 Adjust the upper feed mechanism (Fig.23)
If the upper and lower feed are not in timing during
sewing, the long hole of the horizontal feed crank(right)
should be adjusted to get the length of upper feed.
Adjusting as follows:
A. Loosen the special stud.
B. Move the stud upward to decrease the amount of
upper feed.
C. Move the stud downward to increase the amount of
upper feed. Theoretically, when it is on the reference
line of the horizontal feed crank, the upper feed amount
equals to the lower feed amount.
D. After adjustment, tighten the special stud.
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Handwheel
Button
White mark
Eccentric pin
Belt
Tighten
Loosen
Lower shaft
Set screw
Link
Horizontal shaft crank (right)
Reference line
Special stud
Upper layer feed decreaseUpper layer feed decreaseUpper layer feed decrease
Upper layer feed increaseUpper layer feed increaseUpper layer feed increase