Duerkopp Adler 910 Operating Instructions Manual page 47

Machine information
This menu item provides information concerning the operating hours
and the number of contours sewn.
Motor
Via this menu item the motor is tested.
Entering the test speed
–
Select " RPM:" with the keys "ñ " or "ò ".
–
Set the speed with the keys "ñ " or "ò " .
Input in steps of 100.
"ñ " = Increase the speed
"ò " = Reduce the speed
The sewing motor works with the selected speed.
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