Hi guys!

I need some help. I got a mobile CNC machine from China and a Polen Plasma Sherman.

The CNC is with an automatic torch height controller Fangling F1621. I connect them, but there is missing Arc feedback. When I start the automatic cut, the default time to cut is 15 seconds. After that, there is no feedback and the plasma stops the arc. The actual arc voltage is always zero.

Any advice is helpful.