Necchi Supernova - Fig. 39).; Timing of the Automatic Control Eccentric a 85241

- Timing of the automatic control eccentric A 85241 (Fig. 39).
General Rules
The automatic control eccentric controls the impulses of the cam
axle, and has to be adjusted so that, while sewing a zig-zag
automatically, the cam axle makes each of the single impulses
when the needle bar is on its way upward.
The timing without gauge has to be done as follows:
Remove the automatic mechanism mounting plate.
Bring the needle bar to its highest position.
In this position, the highest point of the eccentric must be on top
of the upper shaft.
Firmly tighten the screw 85279, taking care to avoid end play
in the upper shaft.
H
85279
Fig. 39
44
Copyright -2004