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(20) How to change needle bar stroke
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
1. Changing the needle bar stroke (31 mm → 33 mm)
Needle bar stroke is 31 mm in the state that notch mark
F
on the edge of the eccentric pin
❺
is lo-
cated on the side of the center of main shaft (standard delivery adjustment).
At the time of 31 mm
F
❻
❺
G
❻
Draw out by more than 1 mm
At the time of 33 mm
❹
❻
❺
