Setting The Toothed Belt Tension - Duerkopp Adler 579 Service Instructions Manual

29. Setting the Toothed Belt Tension

General
Malfunctions of the drive motors can be caused by too low toothed belt
tension.
Further, it is very important that the toothed belts, dependent on
running time, be cleaned of dust and thread residue. Dust and thread
residue lodges between the teeth and become stuck because of the oil.
Thus malfunctions can occur which can possibly lead to damage to the
machine.
Possible malfunctions can be e.g. the following:
After the sewing of the forward lip and the buttonhole eye, the
–
sewing mechanism did not turn 180°.
After the sewing of the back lip, the sewing mechanism did not turn
–
90° in the cross bar.
Individual stitches lie outside the seam pattern.
–
The seam is cut open by the buttonhole knife.
–
Error code (208 to 213) is displayed.
–
A malfunction is also then present when the cloth support plate or the
sewing mechanism, after completion of the buttonhole returns only
very slowly into the initial position.
In all cases, the toothed belt tension should be checked first.
Caution Risk of Injury!
Note:
When cleaning the machine, particularly during the daily cleaning of
the sewing area, care is to be taken that compressed air is not used.
Otherwise, dust and thread residue would be distributed throughout
the whole machine.
Adjust the setting of the toothed belt tension and clean the toothed belts
only in the"Safe Stop" position or with the machine turned off.
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