First off, let me start by thanking this community for all the help I've gotten.
Anyway, I'm setting up an ohmic sensor for the CNC plasma, and I've run into some trouble. I've shown how my isolation circuit is set up in the attachment below. (I got this from another post on Mach support forums)
As it currently stands I can open and close the first relay fine, but the second one won't close when the torch shield touches the metal (which of course is attached to the ground clip). Now the way the circuit is set up, this makes some sense to me, since the plasma ground is not connected to the ground on the 12v circuit the relay is running from. Is this correct? And if so, is it safe to connect the plasma ground to the ground on the rest of the electronics?
Thanks in advance.
Anyway, I'm setting up an ohmic sensor for the CNC plasma, and I've run into some trouble. I've shown how my isolation circuit is set up in the attachment below. (I got this from another post on Mach support forums)
As it currently stands I can open and close the first relay fine, but the second one won't close when the torch shield touches the metal (which of course is attached to the ground clip). Now the way the circuit is set up, this makes some sense to me, since the plasma ground is not connected to the ground on the 12v circuit the relay is running from. Is this correct? And if so, is it safe to connect the plasma ground to the ground on the rest of the electronics?
Thanks in advance.