Random arc signal lost

Yes, the z is all calibrated on both ohmic as well as the float switch.

Does it have the same issue on float and ohmic?

Yes it does

Maybe try using the lowpass filter.
linuxcnc.org/docs/2.8/html/plasma/plasma...r-guide.html#lowpass
This would be in the <machine-name>_connections.hal.

Edit sorry,that probably won't help as you are using mode 1.
I think you may need to try the Halscope plot so we can see what is happening.

phillc54 wrote: Halscope plot

*shudders* I guess I have another reason to learn Halscope :lol:

snowgoer540 wrote:

phillc54 wrote: Halscope plot

*shudders* I guess I have another reason to learn Halscope :lol:

I know you are trying to put it off but...

phillc54 wrote:

snowgoer540 wrote:

phillc54 wrote: Halscope plot

*shudders* I guess I have another reason to learn Halscope :lol:

I know you are trying to put it off but...

To get a start on things, in this case, I would want to plot the arc-ok signal, and perhaps the voltage of the arc. Would I use the torch on as a trigger?

Yeah, I think that would work

Something else you could experiment with in <machine-name>-connections.hal

Unlink the plasmac Arc OK input .
Add an extra debounce component.
Net the Arc OK signal from the Mesa card to the debounce input and the debounce output to PlasmaC Arc OK .

phillc54 wrote: Something else you could experiment with in <machine-name>-connections.hal

Unlink the plasmac Arc OK input .
Add an extra debounce component.
Net the Arc OK signal from the Mesa card to the debounce input and the debounce output to PlasmaC Arc OK .

I really need to start writing things down. I had this though on the way to work this morning! I actually thought "I wonder if the Arc-OK is de-bounced". I think the Hypertherm closes a set of dry contacts, so it could be that there needs to be a small debounce before things get under way. Does that mean this stuff is really starting to make sense?! :laugh:

Ok, I just looked, the Hypertherm definitely closes dry contacts. I wonder if that's the problem?

Could you offset the debounce delay by then making your pierce delay a bit shorter, or maybe it really doesnt matter that much?