ELNA Star Edition, Руководство по обслуживанию

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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.
See mechanical adjustment
“backlash (lower shaft gear)”.
Eliminate the looseness.
See part removal and replacement
“driving motor (dc motor)”.
Oil all moving parts.
P. 14
P. 27
P. 31
7. Deformation
pattern
1. Inappropriate feed balance.
2. Inappropriate needle swing
timing.
3. Top tension is too strong.
See mechanical adjustment
“stretch stitch feed balance”.
See mechanical adjustment
“Needle swing timing”.
See mechanical adjustment
“Needle thread tension”.
P. 18
P. 16
P. 17