Started Getting Valid Arc Lost Error

I have recently started getting the error "SAV Valid Arc Lost Program Paused". It doesn't even retry to start the torch again. When I get the error, the Z axis also travels to to top limit. Then If I try to restart the gcode, the Z axis crashes into the workpiece like it has lost it's zero position. Luckily my torch will just pop out of it's holder instead of breaking something. Then all of the axis stop moving all together (even in joint mode) and the only way to recover is to exit out of LinuxCNC and restart it.

2 questions

1) Why is this arc error happening and shouldn't plasmaC at least retry to start the torch x amount of times before pausing the program?
2) What is going on with my Z axis?

Have you updated within the last 24 hours?

I updated LinuxCNC using the synaptic package manager on Sunday. I have not run the configurator since I converted my base machine to plasmaC.

Also, how do I issue a resume command? Wouldn't it be better to at least retry to start the torch if the arc is lost? The old THC-Toma setup I was using in LinuxCNC 2.7 did this and it worked fine for my setup.

Bob

Hit the Pause button again.

Yeah I had a brain fart there for second. I was thinking there was a special gcode command to make it resume. I tried hitting the pause button and was able to get it working.

I also found that if the float switch is triggered before the z axis reaches probe height, that the machine stops with that error. But then all of the axis lock up and cannot be moved. I can't even jog the z-axis up to clear the float switch. The only way to get it to reset without restarting LinuxCNC is to re-home the machine. My z-axis has about 1 inch of float so it will drag the torch tip across the sheet metal to home. Once all of the axis re-home, I am able to jog all three axis again. Is this something I'm doing wrong or is it a bug?

I think you should try to reduce the amount of float travel, you don't need much.

It only has to move .1 inch to trip the float switch but the overall travel distance it will move before bottoming out is about an inch.

I have a similar problem. I receive an valid arc lost error at the finish of the cut, not while cutting. The setup is with an powermax 45xp and thcad10 with powermax rs485 comunication. Today i need to do more little hole on a 2mm sheet. Until today the arc lost error was rarely.Which you think may be the cause and what is the condition for "valid arc lost"

Thank you.