Adjustment Of Any Looseness In The Feeding Mechanism - Necchi Supernova Instructions Manual

I - Adjustment of any looseness in the feeding mechanism.
Excessive looseness of parts that are connected with the feeding
mechanism, such as the feed shaft, the feed dog support and the
feed eccentric connecting rod, can be ascertained by setting
the stitch length regulating lever for very short stitches. In this
case, the movements of the parts are offset by the variety of
play and the feeding of the fabric will not be in accordance with
the length of the stitch as set on the stitch length regulating
knob. It is advisable to check the looseness in the following
parts:
pointed bearing pins for feed rock shaft No. 20100;
pointed bearing screw No. 44 for feed dog support No. 20121;
Screws No. 58 at the ends of the connecting rods No. D 85506
and
No. A 26345;
stitch length regulating rod (see instruction re. " Assembling of
feed eccentric connecting rod No. D 85506 and of the stitch
length
regulating rods ").
2 - Adjusting the height of teeth of the feed dog above the
needle plate.
General Rules
Turn the balance wheel by hand toward you and check the
maximum height of the teeth of the feed dog above the needle
plate.
When the feed dog is in its highest position, its teeth must
protrude about 1/32" above the needle plate.
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Copyright -2004