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Motor Fails to Run
Corrective Measure(s)
On/Off switch turned off
• Make sure that both power switches are turned on. First
turn on the rear power switch (to the 1 position); then turn
on the power button on the front-left side of the machine.
Machine not receiving power
• Check that the power connector is securely plugged
into the back of the machine and the three-prong end is
plugged into the power source.
Thread Breaks
Corrective Measure(s)
Thread is poor quality or
may have severe twisting or
thread rot
• Look for severe twisting of threads when approximately
12 to 15 inches has been pulled off, with the ends pinched
together. Cotton threads are particularly susceptible to
dry rot or wet rot which makes thread brittle. Do not use
poor quality thread, or thread that is rotted or brittle.
Top and bobbin tensions not
balanced
• Balance the tension of the needle thread after ensuring
the bobbin tension is adjusted correctly. (For more
information about adjusting tension, see
Bobbin and
Bobbin Tension
and
Thread Tension
in the
Using
Your Machine
section of this manual.)
The machine head has
been threaded incorrectly
or thread spools are not
positioned correctly
• Check that the machine is threaded correctly.
• Inspect for accidental double wrapping of thread on
thread guides.
• Inspect the thread mast, making sure the eyelets of the
mast are directly over the spools.
• Inspect the vertical positioning of the thread cones.
Tipped cones can dramatically affect thread tension and
can cause breakage.
Debris in tension discs
• Inspect for particles and remove any fuzz or debris.
QMP20 VersaST_User Manual _3.23.indd 62
QMP20 VersaST_User Manual _3.23.indd 62
3/24/23 3:25 PM
3/24/23 3:25 PM