Necchi Supernova - Timing of the Zig-Zag Movement and the Movement of the Needle Bar

- Timing of the zig-zag movement and the movement of the
needle bar.
Remove the mounting plate for the Automatic device. Remove the
zig-zag mechanism cover plate No. 85621. Replace the zig-zag
mechanism cover plate with gauge 10-4 (Fig. 43).
Set the machine for straight sewing by moving the needle
positioning lever to the center of the gauge, and the zig-zag width
to zero (completely to the left) (Fig. 40).
Turn the balance wheel slowly toward you until the needle bar
has reached its highest position and the needle bar
connecting link (D 26020) is in a vertical position (Fig. 45).
With the needle bar in this position, the eccentric " A " of the
vertical gear No. C 85664 (Fig. 41) must occupy either position I,
or position II, in the channel of the oscillating lever " C " (Fig.
42).
If the needle bar is in its highest position, but the eccentric " A
"
Fig. 41
position I position H
Fig. 42
46
Copyright -2004