Quote Originally Posted by EddyCurrent View Post
Les, Just explain what happens when you hit the emergency stop button, I don't mean the flip flop changing state, LED's and input to OK1A, I mean after that.
If you notice, things like stepper motors, limit switches, spindle to some extent, are all wired in more or less the same way so it's the emergency stop circuit that interests me.
Correct me if I'm wrong but you are using Mach3 on this job ?
Yes I am using Mach3, the Estop switch just pulls pin 10 low. That's all it did on the original board/switch. I just added the flip flop. Mach3 detects the low and stops everything, there is no hardware emergency stop if that's what you mean.

Regards,

Les