Re: [CAD_CAM_EDM_DRO] Home /limit switches

> > I think the encoder has an index mark (ch. A, ch. B and I) but I don't think
> > CNCpro can use it.
>
> Well, of course, EMC can use it!

It was the $800 board plus servo drivers that stopped me.

>
>
> > I wonder if there is a way to use it. I don't quite see how I can get
> > movement back to the index mark without building some kind of circuit that
> > stops the input to the gekkos when the home switch is reached and the table
> > backs up a set distance.
>
> It depends a bit on exactly how the program expects the hardware to
> function.

I think that the program just stops at the limit change of state then backs away
so the limit isn't the home position, probably the backup distance should change
the limit back to its normal state.

>
>
> > I would have to set the back up distance to go further than the index mark
> > and stop the gekko input, how, a transistor shorting the input from the
> > software high or low as needed. This might be accurate if the homing speed
> > was slow enough. I see this getting a lot more complicated than I thought it
> > would be.
>
> This sounds dangerous. (Not physically, just that it could cause lost
> steps, sometime.)

Why, especially if this is done very slowly?
Bob