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Bobbin case is damaged,
corroded, dirty, etc.
Moving the quilt too fast
for needle speed selected
(Manual mode)
Tension is Poor
Lint caught under the tension
spring in the bobbin
Hand Wheel Won't Rotate
Thread is entangled and caught in
the hook, crea琀椀ng a thread lock
Thread Nests Under Quilt
Not enough tension on top
thread
Improper threading
Thread Backlash
Page 54
• Since thread slides over the surface of the bobbin case at a high
speed, make sure the case is free of any lint or foreign ma琀琀er that
could impede thread passage through the machine ⸀
• Synchronize quilt movement and needle speed to get your desired
s琀椀tch length. Elongated s琀椀tches are an indica琀椀on of moving the
quilt too fast for the current speed.
Correc琀椀ve Measure(s)
• If using short-staple threads, inexpensive threads, industrial
threads, or coated threads, lint and other material will build up
under the tension spring and begin to li昀琀 the spring, reducing the
spring's ability to compress against the thread. Insert a pin or the
corner of a business card under the spring and clear out the lint.
The bobbin tension will return fairly close to its preset tension.
Test the tension before quil琀椀ng.
Correc琀椀ve Measure(s)
• Carefully rock or turn the hand wheel in direc琀椀on of mo琀椀on and
then the other direc琀椀on un琀椀l the thread lock breaks free. Once
the hand wheel can be turned freely, remove the thread from
the hook and basket. Now re-oil the hook and make sure the
hand wheel turns freely without the hook hi琀�ng the needle. It is
possible for a thread lock to cause a 琀椀ming problem.
Correc琀椀ve Measure(s)
• Check that the machine is threaded correctly. Make certain that
the thread is 昀氀ossed snugly in place between the two tension
discs. If the machine is threaded correctly, 琀椀ghten top tension by
rota琀椀ng the tension knob clockwise. (For more informa琀椀on about
adjus琀椀ng tension, see Bobbin and Bobbin Tension and Easy-Touch
Tension™ in the Using Your Machine sec琀椀on of this manual.)
• Refer to threading diagram and threading instruc琀椀ons.
Correc琀椀ve Measure(s)
Quit Maker Pro 18 VERSA
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