Problems And Probable Causes - White 1550 Instructions Manual

PROBLEMS
—
and PROBABLE CAUSES
In most cases, poor sewing results are due to a
damaged needle. Always examiT
needle first before checking other items.
1. SKIPPING STITCHES
bent or blunt needle
*
wrong size needle
needle inserted incorrectly
*
upper thread tension too tight
pressure on presser foot too light
2. UNEVEN STITCHES
bent or blunt needle
wrong size needle
incorrect threading
pulling fabric while sewing
upper thread tension too loose
pressure on presser foot too light
*
loose presser foot
bobbin wound unevenly
bobbin inserted incorrectly in case
3. NEEDLE BREAKS
bent needle touches needle plate or presser foot
*
needle inserted incorrectly
*
pulling fabric while sewing
*
loose presser foot touches needle
*
needle too fine for fabric
turning Pattern Selector dial with needle in fabric
4. UPPER THREAD BREAKS
bent or blunt needle
incorrect threading
*
upper tension too tight
needle inserted incorrectly
needle touches presser foot
needle eye has sharp edges
poor quality thread
*
knots in thread
*
starting to stitch too fast
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