Re: latching E-stop button and relay vs. momentary E-stop button and latching re

> The typical Estop (EPO) button is a normally closed push button

(switch)

> that needs to be twisted to release it.

Mine works that way.

>
> I use mine in my electrical enclosure and our breakout board. The

switch

> that I use has two sets of contacts. One set goes back to my

breakout board.

> The second set turns off power to my power supply.

No BOB yet, but the EPO will control the power supply.

>
> In the breakout board the EPO switch connection turns off all

outputs and

> drops the 5 volts to the optical isolators in the Gecko drive. It

also tells

> Mach3 that the EPO switch has been pushed. Mach3 then drops the

charge pump

> (safety signal) and stops sending step and direction signals to the

drives.

Not sure yet if there'll be a way to send a signal to Mach with just
my EPO, but I'm going to research it and find out. I'd be surprised
if there wasn't.

>
> In my enclosure. twisting and releasing the Estop button will not

restart my

> power supply or have Mach start sending pulses again.
>
> Once the emergency has been cleared, then I can release the Estop

button,

> click on the Mach reset button on the screen. Once Mach starts

sending the

> charge pump signal My breakout board turns on a relay in my power

supply

> board which turns on my power supply.

At first I'll just have an EPO and a Reset switch on the enclosure.
With the latching relay if there's a power outage the latching relay
will drop off and not restart, cutting power to the drivers and
spindle. I'll probably loose position, but for now I'll deal with it.

>
> I hope that this sequence helps you.

Yes it did, thanks,

Monte