DURKOPP ADLER 367 - Potentiometer in the Arm; Basic Adjustment Without Control Panel

2.14 Potentiometer in the arm
Sewing machines of subclass 367-170115 and 367-180115 are
equipped with a potentiometer for speed limitation in case of higher
sewing foot strokes. By means of this potentiometer the control
recognizes the sewing foot stroke and limits the speed.
2.14.1 Basic adjustment without control panel
Sewing machines without control panel have to be adjusted according
to the following description.
Caution: Danger of injury !
Switch off main switch.
Adjust the potentiometer only when the sewing machine is switched
off.
–
Set the lowest sewing foot stroke “min .”
–
Pull out plug 3 of the potentiometer at the printed circuit board 4.
–
Check the resistance at the clamps (2) and (3) of the potentiometer
by an ohmmeter.
Clamp (3) = green conductor
Clamp (2) = brown conductor
Measuring value: 6,9 to 7,1 kOhm
If the mentioned values are not correct, the position of potentiometer 1
has to be corrected.
–
Loosen screw 2.
–
Adjust shaft of potentiometer 1 to the corresponding value.
–
Push potentiometer completely into the drill-hole of the setting
shaft and tighten screw 2.
–
Push plug 3 of the potentiometer in the printed circuit board 4.
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(3) (2)