Re: e-stop sceme

Sound good to me Tony, Do you have any idea what sort of relay you
would need to control 70v dc 20 amp.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Antonius J.M. Groothuizen"
<agroot@s...> wrote:

> Mike,
>
> I'm thinking along the lines of:
> - separate 12V power supply for EPO / E-Stop
> - series connected EPO switch chain (one on PS / driver box)
> - primary power of main TX removed by de-energized relay
> - capacitors on secondary discharged by Mariss' circuit (in files)
> - drives disabled
> - control lines (step / dir) disabled
> - EPO signal (active low) available for processor
>
> Let's both come up with a design, and let this forum rip 'em apart
> as we both will have different ideas. We can then merge our efforts
> into a single project for the files section. I'm using the G201
> drivers, so much the better if you are using a different set as we'll
> have two examples.
>
> What do you think?
>
> Tony
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "zbushz" <mbush@l...> wrote:
> > OK. I have Geckos and Bob Campbells breakout board.I have a seperate
> > 50v power suppy. Now I am starting to put the whole thing together.
> > The first steps are powering everything up. I think the second step
> > should be arrainging for e-stop. I would like a normaly closed red
> > mushroom, that when opened will remove power to everything. If I put
> > relays on the power to the board and the incomeing dc power, would
> > that be enough. Is it good pratice to power down this way. Do I need
> > to be concerned with voltage generated by the motors coming to a
> stop.
> > I would expect to use this button rutinely to put the machine in a
> > safe state for tool and part changes. Any advice will be appreciated
> > take care
> > Mike Bush