Duerkopp Adler 550-767 Installation Instructions Manual - Page 12
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3.3 Checking the positioning
8
The sewing machine should be positioned with the thread lever at top
dead centre.
The proximity switch 2 is attached to the shaft with the proximity-switch
ring 1. With ready-assembled sewing machines the factory-set position
is indicated by a coloured mark.
Checking the positioning
Switch on the machine. Push the pedal all the way back and hold it
there. The thread is severed and the machine moves to the
2nd position.
Use the handwheel to check whether the thread lever is at top dead
centre.
Correcting positioning
If the positioning is not correct, the reference point must be re-adjusted
via the control unit.
The adjustment is described in the Servicing manual.
1
2