Janome Quilt Maker Pro 18 VERSA, Service Manual

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Page 55
Bobbin thread tangles within
the bobbin case, tangles and
winds onto the hook spindle, or
occasionally forms loops on the
bottom of the quilt
• Make sure the bobbin is in the bobbin case correctly and the
thread is coming out from under the tension spring. The bobbin
should rotate clockwise when the thread is pulled.
Motor Fails to Run Corrective Measure(s)
On/Off switch turned off • Make sure the power switch is turned on.
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 E asy-Touch
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.
Bobbin rotation is not smooth • Change the bobbin. The slightest hesitation of the bobbin
rotation can be the cause of dramatic tension change and
thread breakage .
Needle is burred, bent or dull, or
installed incorrectly
• Change the needle at least once per quilt. Make sure the needle is
installed to the top of the stop hole in the needle bar.