Retrofitting a 1986 Maho MH400E

I thing I will feed the e-stop signal to gmccapy like this

And I will not use the estop bouton in gmocapy, only a double bouton for the power up of the machine together with the servos.

I am not sure that will work the way you envisage.

That Gmoccopy E-Stop button is connected with LinuxCNC's "Estop" signal. You need the LinuxCNC Estop signal connected through your MESA card to the the MAHO 28X2-4 pin on the I/O board so that the Mill will E-Stop automatically if LinuxCNC senses an internal software screw up.

You would need remove the net between Gmoccapy's Estop button's signal and linuxCNC's Estop signal to make that simply a start switch. Not sure that is really a good idea.

On mine I didn't add any new hardware. Just used the second set of contacts on 7A1 to put an E-Stop release signal into the MESA, which I netted to V.button.0. The 28X2-4 E-Stop in is wired to my MESA 7i84 TB2-2 , which is netted to LinuxCNC's Estop out. Works fine, pushing 7A1 and the on screen V.button.1 at the same time to start and latch the machine on. Pushing the V.Button 0 gmoccapy Estop at any time estops the machine, as does linux triggered estops (Have done plenty of them during the tuning of the axis PID).
Mark

Linux can power off the machine at any time by cut this out

So gmoccapy can get in and out of estop only with the soft bouton and the V.button.0 pin,
We cant use mushroom stile estop connected directly to estop in pin?

At present I don't have the mushroom button signalling E-Stop to LinuxCNC directly. LinuxCNC is informed of an E-stop through the machine on circuit being dropped as you showed in your last post. This also works fine. I have had the physical E-Stop chain drop out numerous times due to hitting end stops, or because I hit the mushroom while setting up the axis motion, and Linux reliably detected the state change every time.

RotarySMP wrote: Just used the second set of contacts on 7A1 to put an E-Stop release signal into the MESA, which I netted to V.button.0.
Mark

V.button.0. is a momentary bouton type input, if you net it with 7A1 contact (always on if K1 is on), gmoccapy will sense it like you keep pressing the estop bouton at all time