SINGER W510 - Manual (Page 54)

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X X V I . MINOR PROBLEMS AND T H E I R SOLUTIONS
1 . SKIPPED STITCHES
Skipped stitches have become a problem in recent years,
especially with the appearance of knit fabrics and poly­
ester threads on the market. Skipped stitches normally
can be traced to four basic causes:
A. The Needle
(1) The needle is dull or bent. Change it.
(2) The needle is placed incorrectly in the needle
clamp, it is either backwards or is not up in
the needle clamp all the way.
(3) The wrong type of needle is being used for the
fabric. Use ball point needle on knits and wedge
point needles for leathers and vinyls.
(4) The thread is too thick for the size of needle
being used. Use a larger needle.
B. The Thread
(1) The machine is threaded incorrectly.
(2) Many brands of polyester thread are too stiff and
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impossible.
thread.
Change brands or use a cotton
The Presser Foot
(1) The foot being used is not holding the fabric taut
enough over the needle plate hole, thus the fabric
is being pulled up and down while stitching. Use
the foot which gives the most control possible for
the particular job being done.
(2) There is not enough pressure on the presser bar to
hold the fabric firmly. Increase pressure on the
pressure control.
The Fabric
The fabric has a heavy finish on it which deters
stitch formation. Wash the fabric thoroughly
before sewing.
If your machine skips stitches only on certain fabrics, try
all of the above procedures before calling a repairman.
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Check the needle plate area, if there are scratches and
marks around the needle hole opening, your machine is
not being cleaned properly. Always remove the needle
plate and clean the feed dogs periodically. Improper and
lack of cleaning will cause an accumulation of lint which
hampers the feeding mechanism, this” in turn will cause
the operator to impatiently pull or push the cloth causing
the needle to bend and strike the plate, foot or hook,
causing a slip in the timing mechanism. Continuous
striking will cause defects making it necessary to call a
serviceman.
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