3.Adjustment of stepping return strength
1) Loosing nut ⑥ and turn bolt
⑦ to adjust stepping return strength : tighten bolt ⑦t,he
strength increases;loosen bolt ⑦, the strength decreases.
a) Tighten nut ⑥
after adjusting stepping return strength.
Caution:
1.To prevent the unexpected startup of sewing machine,
trim off the power supply before the operation is
conducted.
4.Adjustment of panel moving distance
1) Remove nut
⑧.
2) Move connecting rod joint ⑨
from A to B,panel moving distance is 1.3times than original
one.
3) Move reversely the distance is 0.8 times as original one.
4) Assembly the nut ⑧ after adjusting panelmoving distance.
Caution:
1. To prevent the unexpected startup of sewing machine, trim off the power
supply before the operation is conducted.
2. Stepping strength and stepping return strength both change after adjusting
panel movement,follow the steps above to have adjustments again.
A
⑥
⑦
⑧
⑨
Fig.20
B
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