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. Inappropriate 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. 25
7. Deformation
pattern
1. Inappropriate feed balance.
2. Top tension is too strong.
Adjust the feed balancing screw.
See mechanical adjustment
“Top tension”.
P. 16
P. 15
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