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Trouble shooting
Needle not properly threaded
Thread tension too tight
Something wrong with the needle
Thread is too heavy for needle
Thread check spring is broken
Needle not properly inserted
Needle plate, shuttle or sewing foot damaged
Bobbin thread entangled because of incorrectly wound
bobbin
Bobbin thread not under tension spring on bobbin case
Needle not properly fitted on needle bar
Needle bent or blunt
Needle worn
Needle bent
Needle not properly fitted
Fabric to heavy or to hard
You are pulling on the fabric
Thread tension not properly regulated
Needle thread properly threaded and/or bobbin thread
not properly wound
Thread size not suited to fabric
Thread check spring not working properly
Tension too tight
Sewing foot pressure too strong
Needle and bobbin threads of poor quality
Bobbin thread unevenly wound
NEEDLE THREAD BREAKS
CAUSE
BOBBIN THREAD BREAKS
STITCHES ARE LEFT OUT
THREAD FORMS LOOPS
SHRINKING OR PUCKERING OF SEAM
IRREGULAR STITCHES
MACHINE DOES NOT RUN FREELY AND MAKES A NOISE
Thread properly
Loosen tension
Replace needle
Change
Have a new spring fitted
Insert needle properly
Replace
Wind bobbin correctly
Thread bobbin correctly
Fit needle properly
Replace
Replace
NEEDLE BREAKS
Replace
Fit needle properly
Use needle of correct size
Do not pull
Read instructions for regulating needle and bobbin
thread tension
Thread machine properly and/or wind bobbin thread
correctly
Control size of needle and thread
Have spring replaced
Read instructions for regulating needle – and bobbin
thread tensions
Read instructions for regulating sewing foot pressure
Use top quality threads
Re-wind bobbin
REMEDY
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