Fig.36
A
②
①
B
Standard
Needle timing
is retarded
Needle timing
is advanced
③
28
Adjust the Synchronization of the Needle and Feed(Fig. 36)
1.Remove the rubber plug
①
.
2
.Loosen the two set screws
③
of the feed
eccentric cam
②
,and then turn the feed ecce
-ntric cam
②
slightly to adjust the timing : If m
-ake the needle sooner than material feeding,
rotate toward A direction. If make the needle l
-ater than material feeding, rotate toward B di
-rection. ( The standard of adjustment is whe
-n the feed dog falling from the highest to the
surface of needle plate, the top of the needle
and needle plate should at the same level).
3.Tightening two positioning screw
③
and
assembly the rubber plug
①
after adjusting.
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.If the feed lifting eccentric cam
②
is turned too far in the direction A, it
may cause the needle to break.
3.To prevent material slippage from
occurring,retard the needle timing.
4.To improve thread tightening, adv
ance the needle timing.
-24-
ZOJE Europe 2022
