Hi all have just finished building a cnc plasma with eBay sourced parts v5 BOB  cw5045 controllers and nema 23 steppers
Have it all running and tested with a marker in torch holder ,it has been a steep learning curve as this is my first venture into the
world of cnc .I am now ready to hook up plasma and was wondering if any one has any suggestion on wiring the plasma trigger to spindle
relay output on the BOB ,should I run it through an external relay first any suggestions would be greatly appreciated.

Hi Toes. I too have just finished a cnc plasma. However I do not have thc and the torch goes up .200 every pass. I also do not know how to wire up my hypertherm 45 torch. I was looking at Proma thc. Please help!!!

Hi shoar I wound up just splicing the two wires from the trigger to the spindle relay on the breakout board seem to work great .
Make sure ur spindle output is enabled in mach3 first and rest it before u hook up plasma you should hear it click on and off
When you click the torch fire button on the Mach screen .
As for the return height issue I'm using sheetcam for my g code generator and I use the mp1000 with scribe post processor
And I have a floating head on Z axis you just need to do a bit of editing on cut and pierce heights and you can set ur safe return height
In sheetcam aswell

If u need any help I will copy my sheet cam settings etc to you so u can see what u need to change

Hi Toes.I do need help. I also have a floating torch .This is so cool.Thanks

What are you using for posting Gcode sheetcam?

yes I use sheetcam

Ok cool gimme an hour to get in front of machine and we'll run through things the cool part is when u do ur first cut puts a smile on ur face lol
What country are u in ?

USA

Ok I'm in Australia so I'm in metric but we can work around that what post processor are you using in sheetcam