3
Condition Cause How to fix Reference
6. Noisy
operation
1. Backlash between hook gear and
lower shaft gear is too great.
2. Lower shaft gear is loose.
3. Inappropriatte belt tension.
4. Not enough oil.
5. Upper shaft gear is loose.
Eliminate the backlash.
Eliminate the looseness.
See part removal and replacement
“driving motor (DC motor)”.
Oil all moving parts.
Eliminate the looseness.
P. 2 5
7. Deformation
pattern
1. Inappropriate feed balance.
2. Top tension is too strong.
Adjust the feed balancing screw.
See mechanical adjustment
“Top tension”.
P. 1 6
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