Plasma Unit: Thermal Dynamics A120
Controller: FangLing 2500A
THC: Chinese PTHC-II

I recently got a CNC Plasma cutter and I've been trying to make it work ever since.

Problem: When I start cutting, torch makes all initial steps OK and starts cutting, everything appears to go smoothly but at some point during the cutting path, torch suddenly stops and lifts up and does not finish the part. This happens every time I try to cut a part.

I've checked wiring, THC configuration, and I've messed with controller configuration parameters to no avail.

Does anyone have an idea what could be causing this problem?

Thanks in advance..