Re: [CAD_CAM_EDM_DRO] Re: Home / Limit switches

Ray wrote:

> Someone pointed out a while ago that it would be a bit better if the limit
> switches were closed when everything was okay. A closed signal will fault
> for a broken wire or connection but an open won't.

EMC can certainly be set up to do this. It is even more of a good idea with
opto-coupled inputs, as loss of power to the isolated switch side of the couplers
could make it not sense the home switch either. Then it would run away.
If all axes come up showing out of limit in both directions at the same time,
it would be pretty obvious something is wrong with the switch sensing hardware.

Jon