Pfaff powerquilter 16.0 Owner's Manual page 30

Correcting Common Issues
Stitch Quality is Poor
• Tension is not balanced
• Bobbin case is damaged,
corroded, dirty, et cetera
• Moving the fabric or
depressing the foot pedal
inconsistently
Tension Is Poor
• Lint caught under the tension
spring in the bobbin case
• Poorly wound bobbin
Hand Wheel Won't Rotate
• Thread is entangled and
caught in the hook
Thread Nests Under Quilt
• Not enough tension on top
thread
• Improper threading
Motor Fails to Run
• On/Off switch is off or
power cord is loose
• Foot pedal is unplugged
Page 30
• Adjust the tension of the needle thread after ensuring the bobbin tension
is adjusted correctly (see pages 19-20).
• 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 matter that could impede
thread passage through the machine.
• The My Speed setting should be adjusted to a value that will allow you
to sew comfortably and confidently with the foot pedal fully depressed.
Discover a method of holding the fabric that is most comfortable.
• With some threads, lint and other material can build up under the tension
leaf spring and begin to lift the spring. This reduces the spring's ability to
compress against the thread. By inserting a needle under the spring and
clearing out the lint, the bobbin tension will return to the previously set
tension.
• If the bobbin is wound too tight or too loose it can lead to poor and
inconsistent tension. Make sure when the bobbin is wound that the thread
tension is not so tight that the wound bobbin thread feels hard and causes
the bobbin sides to bulge. It should also not be so loose that the thread is
spongy, which can cause the thread to tangle as it is wound.
• Turn off the machine and remove the power plug from the electrical outlet.
Remove the bobbin case from the machine. Lubricate the hook, then
manually rotate the hand wheel clockwise and counter-clockwise several
times. Remove the thread caught in the hook.
• Check that the machine is threaded correctly. Make certain that the
thread is flossed snugly in place between the two tension discs. If the ma-
chine is correctly threaded, tighten the top tension by rotating the tension
knob clockwise.
• Refer to the threading diagram and threading instructions on page 16-17.
• Turn the machine on only by using the switch on the back of the power
pod. Verify the power cord is plugged in tightly at both the machine and
the power source.
• Verify that the foot pedal is plugged in. If the main screen status message
in the upper left hand corner says "Check Pedal", then the pedal is not
properly installed.
Corrective Measure
Corrective Measure
Corrective Measure
Corrective Measure
Corrective Measure