SINGER W1415 User Manual
Page 35
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•H0U3LE SHOOTING: CAUSES AND REMEDIES
JF, THREAD FORMS LOOPS
CAUSE
REMEDY
Thread tension not properly adjusted
Needle thread and/or bobbin thread not threaded or wound properly
not properly wound
Thread size not working properly
Thread check spring not working properly
Read instructions for regulating needle-and bobbin thread tension
Thread machine properly and/or wind bobbin thread correctly
See "Size of needle and thread"
Have spring replaced
SHRINKING OR PUCKERING OF THE SEAM
Tension too tight
Sewing foot pressure too strong
Read instructions for regulating needle-and bobbin thread tensions
Read instructions for regulating sewing foot pressure
IRREGULAR STITCHES
Needle and bobbin threads of poor quality
Bobbin thread not wound correctly
Use top quality threads
Re-wind bobbin
MACHINE DOES NOT RUN FREELY AND MAKES A NOISE
Machine needs oiling
Dust and thread in shuttle
Wrong oil used, has now clogged machine
Drive belt tension too tight '
Read instructions on how to oil
Read instructions on how to clean shuttle race
Clean machine carefully and re-oil with top quality oil
Loosen tension of drive belt
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