Timing Procedure - Necchi Supernova Instructions Manual

Timing procedure.

a
Bring the needle bar to its lowest position. In this position, the
lower end of false needle should be just in line with the lower
edge " L " of the prong of this gauge, as shown in Figs. 19 and 20.
If an adjustment of the height of the needle bar is necessary,
loosen slightly screw No. 4 (Fig. 17) so that the needle bar is still
held in position by friction. Then, without turning the balance
False needle
Fig. 20
wheel, move the needle bar up or down by hand until the condi-
tion, shown in Figs. 19 and 20, is met. Tighten screw No. 24 firmly.
Adjustment - Position of the needle eye in relation to the shuttle.
The needle bar must be lined up in such a way that the center
line of the needle eye is perpendicular to the shuttle (Fig. 21),
i.e. the needle eye must not be lined up obliquely in relation to
the shuttle (Fig. 21a). The correct alignment of the needle causes
the loop of the thread to be arranged in such a way that it can be
easily caught by
24
Copyright -2004