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Posted by Kay Lancaster on October 25, 2009, 5:42 pm
Take it apart as far as possible, clean (vacuum and brush only, not compressed
air), oil if so directed in the manual, reassemble. Remove all thread
from the machine, top and bobbin -- bobbin out, spool off the spool pin.
(I just "cured" a machine that was "mistimed" by taking the spool off and
removing the backlashed thread under the spool pin.)
If you tried to sew stickyback velcro, use a piece of well-washed cotton
muslin over a cuticle stick or q-tip; dip the cotton in rubbing alcohol or
unflavored vodka and clean and dry the local thread path... there may be
residue carried down by the needle.
Make sure the needle is in right way around -- generally flat of the needle
to the back. Backwards needles don't pick up thread well and skip
stitches. (I'd suggest a size 80/12 sharp needle for testing purposes --
that's what they're usually timed with, ime.)
Rethread from scratch, manual in hand, making sure the presser foot is up
so the thread can enter the upper tension.
Try again, making sure you hold the ends of the thread when starting the seam.
If no joy, go to:
show/hide quoted text
<http://sewusa.com/Sewing_Machine_Repair/Sewing Machine Hook Timing.htm>
(that URL is likely to break... make sure you get all of it) and
compare the timing there to your machine.
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