SINGER W671 - Manual (Page 23)

SKIPPED STITCHES
A bent or blunt pointed needle is often the cause of this. See that the needle
plate is accurately inserted, (see page 8) Remove the needle plate and after
ascertaining that the feed is clean and working freely, replace the needle plate. ^
NEEDLE BREAKS
See that the needle is not bent and avoid pulling the material when stitching ;
either condition will cause the needle to strike on the needle plate and break.
MATERIAL PUCKERS
This is generally due to incorrect tension. See that both the bobbin case and
the needle are properly threaded : that the thread used is of good quality and the
correct size for the needle, (see page 23)
STITCHES LOOP
This is regulated by the tensions, (see page 11) See that both the bobbin case
and the needle are properly threaded ; that the thread used is of good quality
and the correct size for the needle, (see page 23)
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