Adjustment
16
Fig. 13 - 11
13
.05
Adjusting thread trimmer -900/51
13
.05.01
Control cam
(pre-calibrating)
Rule
When the needle bar is in b.d.c., the groove
4
of the control cam
2
should stand vertical
under the feed regulator pin
5.
O
Loosen the screws
1
through the hole in the machine housing.
O
Move the thread lever to b.d.c.
O
Turn the control cam
2
according to the
rule
.
O
Move the control cam
2
down so that it touches the bearing
3
and tighten
the accessible screw
1.
O
Make the second screw
1
accessible and tighten it.
2
1
2
4
3
5
Summary of Contents for 333-712/02
Page 29: ...Notes...
