2.2 Upper and lower toothed belt wheel/ Toothed belt
2.2.1 Position of the upper toothed belt wheel
Caution: Danger of injury !
Switch off main switch.
Check and set the position of the upper toothed belt wheel only when
the machine is switched off.
Standard checking
The toothed belt wheel 2 is fastened on the arm shaft 4 with two
screws. The screws must sit on the flat spot 1.
The distance between the toothed wheel 2 and the bobbin winder
wheel 3 must amount to 0.8 mm when the bobbin winder is switched
off.
–
Check distance between toothed belt wheel 2 and bobbin winder
wheel 3 by means of a feeler gauge.
Correction
–
Loosen core pins 5 in the toothed belt wheel 2.
–
Turn toothed belt wheel 2 until the screws s it on the flat spot 1 of
the arm shaft 4.
–
Set lateral distance of 0.8 mm between toothed belt wheel 2 and
bobbin winder wheel 3 by a feeler gauge.
–
Tighten core pins 5 in the toothed belt wheel 2.
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