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How to check the alignment between the underside of the
presser foot and the teeth of the feed dog.
To make the machine feed correctly and thus to obtain a perfect
seam, it is necessary that the entire bottom face of the presser foot
rests fully (flush) on all teeth of the feed dog. To check whether
this requirement is met, use a thin piece of paper (about 0,03"
thick) in the following manner (first, however, make certain that
both the presser foot and the feed dog are correctly fitted on the
machine):
Turn the balance wheel by hand toward you until the feed dog
rises to its highest position above the top surface of the needle
plate.
Lower the presser foot until it rests on the feed dog.
Lift the presser foot somewhat, then insert the piece of thin paper
successively between presser foot and feed dog at each of the
four
corners of the presser foot, always lowering the presser foot fully
after the paper has been inserted.
The presser foot rests properly on the feed dog when the piece
of
paper is retained firmly between presser foot and feed dog at
each
of the four corners of the presser foot.
If this requirement is not met, it may be due to three different
causes. Namely:
The presser foot, either due to excessive wear or to improper
fast
ening to the presser bar, does not rest correctly on the feed dog.
The feed dog is either excessively worn or it is not fastened pro-
perly in the machine.
There exists a combination of both aforementioned defects.
To adjust, proceed as follows:
Replace the old presser foot with a new one.
68
Copyright -2004
Summary of Contents for Supernova
Page 1: ...Instructions For Servicing The Necchi Supernova Sewing Machine 1 Copyright 2004...
Page 15: ...15 Copyright 2004...
Page 17: ...Fig 11 Fig 12 Fig 13 17 Copyright 2004...
Page 23: ...False needle Fig 18 False needle Fig 19 23 Copyright 2004...
Page 43: ...Fig 38 43 Copyright 2004...
Page 49: ...49 Copyright 2004...
