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Possible Problem Area Solution Checklist
Needles / Needle Depth /
Needle Plate
1. Check needle orientation.
If a needle is installed backwards or turned too much, thread breaks
can occur. It is recommended that the eye of the needle be tilted 5°
to the right; however a range of needle orientation is acceptable.
The eye of the needle can be facing directly forward or be tilted to
the right by a maximum of 20°.
2. Inspect needle(s) for damage such as burrs, scratches, and dullness.
Replace if necessary.
3. Make sure you are using the correct needle(s) for the size of thread
being used.
4. Check needle depth to make sure that it is correct.
5. Verify that the needles are centered in the needle plate. The needle
needs to pass approximately through the absolute center of the hole
in the needle plate without rubbing or hitting the needle plate. If
this isn’t the case for the majority of the needles (i.e. most needles
are far off to the right or left).
6. Inspect the needle plate hole to be sure it’s free of nicks, burrs or
anything that may cause the thread to fray. Replace if necessary.
Thread / thread path 1. Make sure the machine is threaded properly (see Upper Threading
for instructions).
Make sure that there is no misguided thread.
The thread should be centered in the groove under the thread feed
rollers.
Make sure that no thread is caught or wound around the thread
feeder gears.
Make sure the red pinch rollers are down.
2. Make sure you are using high quality thread. Look for kinks, frays, or
thread which seems to unravel and/or twist during use. If the thread
is suspected to be bad, exchange with a high quality thread to try
and isolate the problem.
3. Be sure the thread tubes, which pass along the center of each thread
cone, extend at least 1” beyond the end of the cone. Otherwise, the
thread may become tangled.
4. Be sure the thread cones are fully seated against the thread tree
base. If not, the thread could become entangled beneath the cone.
Thread feeder / Pinch
rollers
1. Inspect thread feed & pinch rollers for wear and/or damage. Replace
if necessary.
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