Homemade, cheap, plasma CNC

Thanks Tommy,

Here now trying to fix it.

First cut is fine. Second cut won’t create an arc ok. Everything off including thc.

Light on the Mesa goes the first time, but second time halshow and hardware all show that arc ok doesn’t change and the input on the Mesa board doesn’t change.

Where is the arc ok derived from? Plasma? Reed switch? or from THCAD?
For first two, check the plasma source, not LinuxCNC/Mesa/THCAD

Thanks Tommy.

Figured it was program as it all worked on the first cut.

Turns out I had to drop the high voltage arc ok from 250 (which is the setting on my machine) to 200. Once this was done it activated arc ok ever time.

Cheers

I thought you upgraded your machine to a Hypertherm 45XP or similar.
If that is the case, please use the Arc OK output on your plasma cutter as it will save you issues in the future.
You can get the cable (and the interface) for your plasma cutter from QWS in Brisbane

Thanks Rod,

This is on the old machine that has gone to it's new home.

All working again now.

Cheers