ELNA 3210 Service Manual page 4

Elna International Corps. SA
CONDITION
3 Needle thread
breaks
4 Bobbin thread
breaks.
5. Needle breaks. 1. Needle is hitting the
CAUSE
1. Initial sewing speed is
too fast.
2. Thread path is incorrect.
3. Needle is bent or dull.
4. Upper thread tension is
too strong.
5. Needle size is
inappropriate for fabric.
6. Needle eye is worn.
7. Needle hole in needle
plate is worn or burred.
1. Incorrectly threaded
bobbin.
2. Too much thread is on
the bobbin.
3. Lint is stuck inside the
bobbin holder.
4. Thread quality is too low.
5. Thread is jamming
around the bobbin.
needle plate
2. Needle is bent or worn.
3. Needle is hitting the
shuttle.
4. The fabric moves while
the needle is piercing it,
or the needle zigzags
while in fabric.
5. Fabric is being pulled too
strongly while sewing.
3210 / 3230
HOW TO FIX
Start with medium speed
Use the proper thread path.
Replace with a new needle.
Adjust needle thread
tension correctly.
Use appropriate needle for
fabric and thread in use.
Change the needle.
Repair the hole or replace
the needle plate.
Thread bobbin correctly
Adjust the position of
stopper.
Clean the shuttle.
Change to a higher quality
sewing thread.
Clear out the jamming
thread.
See mechanical adjustment
"Needle Drop Position"
Change the needle
See mechanical adjustment
"Clearance between
Needle and Hook"
See mechanical adjustment
"Needle Swing".
Guide the fabric gently
while sewing.
Page 02
Service manual
REFERENCE
Page 13
Page 18
Page 11