Arc OK intermitent issues on torch fire

snowgoer540 wrote: Personally, I would hook the THCAD-10 to the 7i76e's encoder 5V supply...

Is this what you would personally do?

Yep, in fact that’s how mine are wired.

You can also use the 7i76e spindle relay but its polarised so if you connect it the wrong way, the torch will be always on..
Its working fine for me once I turned the wiring around the right way...

HINT: have the plasma turned off when you first fire it up. With a bit of luck your Hypertherm will sense a wiring error (torch stuck on) like my Thermal Dynamics, raise an error and not turn on.

Eliminates the relay so one less failure point... Took me a long time to try it, but it works fine for me! So with ohmic sensing I have no relays in my machine...

rodw wrote: You can also use the 7i76e spindle relay but its polarised so if you connect it the wrong way, the torch will be always on..
Its working fine for me once I turned the wiring around the right way...

HINT: have the plasma turned off when you first fire it up. With a bit of luck your Hypertherm will sense a wiring error (torch stuck on) like my Thermal Dynamics, raise an error and not turn on.

Eliminates the relay so one less failure point... Took me a long time to try it, but it works fine for me! So with ohmic sensing I have no relays in my machine...

That is good to know. Which spindle pins do you land 'torch on' and 'torch com' at the 7i76e?

At what point do I need new firmware/software for the 7i76e?

The only two items left to connect are THCAD-5 Hypersensing module and maybe (if it's worth it) RS485 connection between my Hypertherm and PC.

snowgoer540 wrote: Yep, in fact that’s how mine are wired.

Thanks. I cleaned up the drawing a bit, also made it a bit more indicative of my real world wiring using distribution blocks. The only 'real' change is THCAD 'gnd' moved to TB3-1 and the shield is connected to frame ground. If anyone sees any error, please let me know. I will try Rod's spindle mode for torch on, just need to understand which pins he is using.

Now on to hypersensing wiring. How exactly is the 390k wired in?