Necchi Supernova Instructions Manual page 105

Set the design graduating knob at " 4 ".
Turn the balance wheel by hand (or let the machine run very
slowly, holding the balance wheel back) and count the number
of impulses which the cam axle receives during one full turn of
360 degrees. If the number of impulses is between 135 and 165,
the adjustment is correct.
If the number of impulses is under 135, correct as follows:
Turn the balance wheel by hand and bring the thread take up
lever to its highest position; set the design graduating knob at
" 4 " (see Fig. 89).
Pull the cam connecting lever No. D (A 26/3/25) to its working
position (toward the arm of the machine), so that the screws " A "
and " B " are fully visible (see Figs. 89, 90 and 91).
Loosen slightly screw " A ", and also loosen very slightly " B ",
move the graduation pointer " C " slightly toward the " plus "
sign (see Fig. 90).
Now tighten screws " A " and " B ". d) Check again the number
of impulses as explained previously und-
er
Fig.
90
105
Copyright -2004
Fig. 91