Quote Originally Posted by Dwayne Dibbley View Post
Where would you place a stop button to release the latch? or not required?
When you press E-stop or the stop button then latch is dropped because power is removed from relay. So in your schematic E-stop and Stop are the same.

Same in Mach3 if you press Stop while machine is moving then consider it just the same as pressing E-stop button. You will lose position and need to Re-home before continuing. Only Feedhold is safe controlled stop.