Adjustment - Height Of The Needle Bar; Timing Of Shuttle And Needle Bar In The Supernova - Necchi Supernova Instructions Manual

The timing of the movements of the zig-zag mechanism and the
needle bar.
The timing of the Stitch Regulating Worm.
The timing of the eccentric for the "Automatic ".
Note: All these timings have been done and thoroughly checked in
our factory during the assembly. We, therefore, can guarantee
their perfection.
In some cases, as for example the timing of shuttle and needle
bar, the parts are fixed together by pins and, therefore, the
timing will never change.

- Timing of shuttle and needle bar in the SUPERNOVA.

Adjustment - Height of the Needle Bar.

Turn the balance wheel by hand toward you until the point of the
shuttle is just at the center of the rising needle.
At this moment the point of the shuttle should be about 1/16"
above the upper part of the needle eye (Fig. 16).
If the distance " a " is more or less than 1/16", an adjustment is
necessary. Loosen slightly screw No. 24 (Fig. 17) in the needle
bar connecting stud No. 26025 so that the needle bar No. D
20037 is still held in position by friction.
Now, without turning the balance wheel, push the needle bar up
or down by hand until the distance " a " is equal to about 1/16".
Tighten screw No. 24 firmly after this adjustment.
This adjustment can also be achieved with the aid of the TIMING
GAUGE No. 10-5. The gauge is composed of a body, similar to the
shuttle, and of a false needle (gauge pin), contained in the
upright of
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