Checking The Timing Of The Shuttle And The Needle - Necchi Supernova Instructions Manual

Pig. 29
indicated in Fig. 29). This angular position is approximately cor-
rect but in must be checked (see item 2 below). Now, tighten
firmly the set screw No. 04850 GEB in the oscillating crank shaft
(Fig. 28). Assemble the machine completely.
Check the timing of the shuttle and the needle in the following
manner:
Turn the balance wheel by hand slowly toward you until the need-
le has risen about 3/32" above its lowest position. At this moment,
the point of the shuttle should be exactly at the center of the ris-
ing needle (Fig. 30). If this requirement is not met, loosen the
set screw No. 048050 GEB in the oscillating crank shaft (Fig. 28)
and turn the carrier shaft No. C 26325 in the required direction
until the point of the shuttle has reached the center of the needle
which has remained stationary. Tighten firmly set screw No.
048050 GEB.
Operation No. 2 can also be performed with the aid of the TIM-
ING GAUGE No. 10-5 in the following manner: Insert the gauge
No. 10-5 as explained in the paragraph: "Timing of shuttle
and needle bar in the SUPERNOVA". Bring the needle bar to
its lowest position. In this position, the false needle, if correctly
adjusted, will lie between the two timing lines "A" (Fig. 31). If the
needle does not lie between the two timing lines "A", loosen the
screw No. 048050 GEB (Fig. 28). Now, without moving the
balance wheel, turn the carrier shaft in the
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