SINGER 3214 - Manual (Page 46)

PROBLEM PROBABLE CAUSE CORRECTION
The material
puckers Upper or lower thread tension too tight R18
Stitch too long for material R18
Thread too thick R17
Incorrect threading of upper or lower thread R8,10
Breaking needle Needle not correctly inserted R.16
Needle bent R16
needle clamp screw too loose R.16
Upper thread tension too tight R.18
Needle too fine for the material R17
Dials and levers have been changed while
the needle was down int he material
R18,20
Zigzag width set too wide while twin
needle was attached
R33
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