Pagina 5
The procedure for automatic potentiometer signal acquisition is carried out from the console.
This makes it possible to adjust the minimum and maximum useful signal in the respective
directions.
The sequence of procedures is described in the programming console manual.
fig. 8a fig. 8b
The first graph (Fig. 8a) shows the correspondence of the motor voltage without having made
the acquisition, while the second graph (Fig. 8b) shows the same correspondence after signal
acquisition by the potentiometer.
The acquisition procedure is invalidated by the machine if the difference between the
maximum value and the minimum value is less than 2V.
This acquisition procedure makes it possible:
- to use “reversed” potentiometric signals, i.e. those which are carried from a high initial value
to a low final value.
- to use a normal potentiometer instead of one with central zero.
For the correct functioning of signal acquisition, it is absolutely necessary that the running
microswitches be activated by the same shaft that moves the potentiometer.
- 2-wire potentiometer (request while ordering)
It is possible to use a potentiometer with 2-wire configuration, in which case the resistive value
of the potentiometer desired must be indicated, as a resistance with the correct corresponding
value must be fitted in the logic unit.
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