Janome 3128 - Page 5

MODEL 3128
3
CONDITION CAUSE HOW TO FIX REFERENCE
5. Needle 1. Needle is hitting the needle See mechanical adjustment P.11
breaks plate. “Needle drop.”
2. Needle is bent or worn. Change the needle.
3. Needle is hitting the hook See mechanical adjustment P.12, 13
race. “Clearance between needle
and hook”.
4. The fabric moves while the See mechanical adjustment P.10
needle is piercing it, or the “Needle swing”.
needle zigzags while in
fabric.
5. Fabric is being pulled too Guide the fabric gently
strongly while sewing. while sewing.
6. Noisy 1. Backlash between shuttle See mechanical adjustment P.13
Operation hook gear and lower shaft “Clearance between needle
gear is too great. and hook (No.2)”.
2. Lower shaft gear is loose. Eliminate the looseness.
3. Inappropriate belt tension. See mechanical adjustment P.19
“Motor belt tension”.
4. Upper shaft gear is loose. Eliminate the looseness.
5. Not enough oil. Oil all moving parts.
7. Deformation 1. Inappropriate zigzag See mechanical adjustment P.10
pattern synchronization. “Needle swing”.
2. Inappropriate See mechanical adjustment P.18
disengagement of cam “Disengagement of cam”.
follower.
3. Upper thread tension is Adjust upper thread tension P.7
too strong. correctly.