http://www.youtube.com/watch?v=qt41hhnIBDA

We have tried grounding the SS, ungrounding, powering from external power supply, powering from USB, disabling charge pump, enabling audio to hear if it is disabling at all. All have no effect on the Estop Issue. Arturo from cnc4pc.com is sending me a new chip that could need replacing.. We will see what that fixes. At this point i think we have literally exhausted all the routes.

Since i have disabled the charge pump the board has lit up more LEDS, and if i trip a optical limit i can hear the relay snap on and off. If i load up mach 3, the limits still work, but i no longer hear the relay. Also all the LEDS turn off when mach 3 comes on.

Hopefully Arturo comes to the rescue because i am beyond lost. 

Jeremiah,

I think I have document a little better how e-stop works on this board.  This is what is creating all the confusion.

Here is how it works:

- When the e-stop button is pressed, it does a hardware disable on all the outputs and sends the signal back to the controller.

- The microcontroller is also allowed to send an e-stop signal if something faults.

I think the problem you are having is that something else is faulting and the microcontroller is trying to send that signal back to the controller.

I think it is de drivers, please do not use software disable on the drivers and let me know how it goes.

Arturo Duncan
http://cnc4pc.com

hopefully between the micro controller, and the new updated C34-V200 with pin for hardware/software disable i will be back in the game.

Time will tell!