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ADJUSTING THE AMOUNT OF FRONT-TO-BACK MOVEMENT ON THE TOP FEED DOG
1-1 To adjust amount of front-to-back movement (stitch length)
on the top feed dog in relation to the main feed dog
The main and top feed dogs separately move on this machine.
Therefore, if the movement amount of the main feed dog is changed, that of the top feed
dog should be changed. The movement ratio of the top feed dog in relation to the main
feed dog is one to one (standard). The symbols on scale
①
serve as the reference for the
amount of front-to-back movement on the top feed dog. S indicates 2mm. M indicates
4.5mm. L indicates 7mm. C (CENTER): The top feed dog moves front to back in the
divided-in-half mode. B(BACK): The top feed dog moves front to back in the rear-fixed
mode. F(FRONT): The top feed dog moves front to back in the front-fixed mode.
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In the case of C or B
Adjust the amount of front-to-back movement with symbols
②
on scale
①
and mark
⑤
on adjusting guide
④
.
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In the case of F
Adjust the amount of front-to-back movement with symbols
③
on scale
①
and mark
⑥
on adjusting guide
④
. To increase the amount, turn knob
⑦
clockwise.
To decrease the amount, turn knob
⑦
counterclockwise. Adjust the amount while
checking the stitch formation.
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To adjust the amount of front-to-back movement during
sewing by means of a pedal and chain, knee switch, etc.
(optional)
In the case of a pedal and chain:
Hook a chain over the end of lever
⑨
(see the illustration).
To set the amount, move adjusting guide
④
to the right
by lowering lever
⑨
(the amount is increased). Loosen
screws
⑧
. Position the stopper while checking marks
⑤
and
⑥
on adjusting guide
④
.
Then tighten screws
⑧
. The amount can be increased up
to mark L.
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