typical GC0303D, Руководство по эксплуатации

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4
3
1
2
5
2
1
C
6
27
7
8
A
Left
Right
Smaller
Larger
Needle plate
Upward
Downward
29. Adjusting the lifting amount of
presser feet (Fig. 27)
1.Vertical movement of presser foot and walking
foot
★ The presser foot ① and walking foot ② move
vertically one after another
★ Usually the stroke of walking foot and presser
foot is same or the stroke of walking foot is
slightly lower.
Place the thread take-up lever at the lowest
position, and lower the presser bar lifter, loosen
the screw
③ and move the upper feed lifting cam
④ .
Move it rightward to make the stroke of two feet
be equal
Move it leftward to make the stroke of presser
foot be smaller.
2.Adjusting the lifting amount of presser feet
Adjust the lifting amount of two feet to match the
materials to be sewn.
Loosen the screw
⑤ , and move the screw
upward to increase the lifting amount or move
the screw downward to decrease the lifting
amount.
3.Adjusting the forward/backward clearance of
the two feet
To keep the front groove of presser foot not strike
the rear of the walking foot, the clearance of C
must be kept about 3mm.
Loosen the screw of feed arm R, and then turn
the feed rock shaft
⑥ to adjust.
4.Adjusting the feed amount of walking foot
(Fig. A)
★ The standard ration of feed amount between
feed dog and walking foot is 1:1
The feed amount of walking foot can be adjusted
to suit for the materials to be sewn.
Loosen the nut
⑦ , and move the slide block ⑧
Upward: decrease the distance L to make the
feed amount be smaller
Downward: increase the distance L to make the
feed amount be larger