Re: [CAD_CAM_EDM_DRO] Opinions: Hall Effect (digital output type) as limit switch???

studleylee wrote:

> Hi,
> With inductive proximity sensors being in the range of $60 each:(or
> are there cheaper ones out there?
>
> Opinions: Hall Effect (digital output type) as limit switches ???
>
> Ideas:
> Open collector outputs could be paralleled for redundency in placing
> 2 sensors in one package. Known Drawback: if sensor power
> supply fails.

Set up the sensor and input to the computer such that the signal that
the computer gets at the limit is the same as with no power. That way,
if the sensor has no power, the machine can't move.

Jon