Janome 6260QC Service Manual page 4

Condition
3. Breaking 1. Initial sewing speed is too
upper
thread 2. Thread path is incorrect.
3. Needle is bent or dull.
4. Upper thread tension is too
5. Needle size is inappropriate
6. Needle eye is worn.
7. Needle hole in needle plate
4. Breaking 1. Incorrectly threaded bobbin. Thread bobbin correctly.
bobbin 2. Too much thread is on the
thread
3. Lint is stuck inside the
4. Thread quality is too low.
5. Thread is jamming around
5. Needle 1. Needle is hitting the needle
breaks
2. Needle is bent or worn.
3. Needle is hitting the shuttle.
4. The fabric moves while the
5. Fabric is being pulled too
Cause
fast.
strong.
for fabric.
is worn or burred.
bobbin.
bobbin holder.
the bobbin.
plate.
needle is piercing it, or the
needle zigzags while in
fabric.
strongly while sewing.
How to fix
Start with medium speed.
Use the proper thread path.
Replace with a new needle.
Adjust upper thread tension
correctly.
Use appropriate needle for
fabric and thread in use.
Change the needle.
repair the hole or
Replace the needle plate.
Adjust the position of stopper.
Clean the shuttle.
Change to a high quality
sewing thread.
Clear out the jamming thread.
See mechanical adjustment
"needle position".
Change the needle.
See mechanical adjustment
"needle clearance to shuttle".
See mechanical adjustment
"zigzag synchronization".
Guide the fabric gently while
sewing.
2
Reference
p.10
p.12
p.17
p.27