Potentiometer In The Arm; Basic Adjustment Without Control Panel - DURKOPP ADLER 367 Service Instructions Manual

2.14 Potentiometer in the arm

2.14.1

Basic adjustment without control panel

(3) (2)
42
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.
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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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