Homemade CNC Plasma - hypertherm, Mesa, gear drives, nema 34.

Thanks Tommy,

Never had the machine grounded. Mostly because all my machines previously have been moveable due to my small shed.
I have installed an earth rod now and connected it to the machine. No change. we did also have rain yesterday so the ground is very moist.

I'll go through and try and check for voltage shortly. Digital Voltage Meter set to 0-20V to see if i can get any readings.

Cheers

Couldn't find any spots showing voltage.

Ran new earth wires everywhere, from the gantry, torch holder, x axis motor mount, y axis motor mounts, table, water table.

No change, still getting errors when the torch begins a pierce.

What plasma cutter are you using these days?
Do you have an EMI filter on your mains inlet to the control box? Jaycar have them
 

Still using the hypertherm XP45. it's been on it the entire time.

no EMI filter yet.

OK, hold the EMI filter thought for now. When I had EMI issues, fitting one solved it.
Choose from here locally, but there are other IEC connectors with mains switch and fuse built in
www.jaycar.com.au/components-electromech...-emf-products/c/2GLC

But in your case what is odd is that its been trouble free for so long. When you say error, is it always a limit switch error or could it be the arcOK is failing?

 

Always the 'joint 1 on limit switch error' or 'joint 0 on limit switch error'.
Mostly at pierce now, but has slowly been creeping in and would do it halfway through a cut. same error.