Janome DC6030 Service Manual page 4

Condition
1. Bobbin holder is incorrectly threaded.
2. Too much thread is wound on the bobbin.
3. Lint is stuck inside the bobbin holder.
4. Thread quality is too low.
5. Thread is jamming around the bobbin
holder.
1. Needle is hitting the needle plate.
2. Needle is bent or worn.
Needle
3. Needle is hitting the hook.
breakes
4. Fabric is being pulled too strongly while
sewing.
1. Lower shaft gear is loose.
2. Inappropriatte belt tension.
Noisy
operation
3. Not enough oil.
4. Upper shaft gear is loose.
1. Top tension is too strong.
Deformation
pattern 2. Inappropriate feed balance.
Cause
2
How to Fix
Set the bobbin thread correctly.
Adjust the position of bobbin winder
stopper.
Clean the bobbin holder.
Change to a high quality sewing thread.
Clear out the jamming thread.
Adjustment of Needle Drop Position
(Reference P.9)
Change the needle.
Adjustment of Clearance between Needle
and Tip of Hook Rotary (Reference P.12)
Guide the fabric gently while sewing
Eliminate the looseness.
See part removal and
replacement "driving motor (DC motor)".
(Reference P.25)
Oil all moving parts.
Eliminate the looseness.
Adjustment of top tension.
Adjust the feed balancing screw.