Performance checklist – SINGER 7021 Merritt User Manual

Page 82

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Performance checklist

When sewing difficulties occur, look back
through this manual to make sure you are

correctly following the Instructions. If you
still have a problem, the reminders below
may help you to correct it.

Needle Does Not Move

Is machine connected to electrical
supply?
Is the power and light switch on?
Is controller connected?
Is the handwheel engaged for bobbin
winding?

Needle Moves But Stitch Is Not
Formed

Is needle defective?
Is needle fully inserted into needle clamp?
Are

bobbin

and

needle

correctly

threaded?

Is bobbin correctly Inserted Into bobbin
case?

Is there thread in the bobbin?

Needle Breaks

Is needle straight and sharp?
Is needle correct size?
Is needle fully inserted into needle clamp?

Are controls properly set?
Are accessories correct for application?

Bobbin Winding Difficulties

Is thread unwinding freely from spool?
Is bobbin winder engaged?
Is thread end securely held at start of
wind?
Is thread hanging up on the slit on the

thread spool?

Upper Thread Breaks

Is machine properly threaded?
Is thread freely unwinding from spool?
Is proper spool cap being used?
Is needle correct size for thread?
Is upper thread tension too tight?
Is bobbin case properly inserted?
Is bobbin rim free of nicks?

Lower Thread Breaks

Is bobbin correctly wound?
Is bobbin correctly inserted into bobbir
case?
Is bobbin case correctly threaded?
Is thread hanging up on the slit on the

thread spool?

Skipped Stitches

Is machine properly threaded?
Is fabric firmly held down?
Is needle correct style and size?
Is needle straight and sharp?

Fabric Does Not Move Properly
Under Presser Foot

Is presser foot correctly attached to
machine?
is presser foot lowered?
Is stitch length correctly set?

80

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