We have two HPR260s Auto gas running on a large C&G systems Crossfire cnc gantry. Both torches are controlled by Innova (kaliburn) thc. The controller is a burny 10 LCD +.
The problem is with torch 2. With the thc set exactly as torch 1, torch 2 dives to the plate. Arc volts never really stabilize at the setpoint.
5/8" MS
THC settings: 131 Arc Volts, .320" Pierce Height, .160" Cut Height, 0.6 sec pierce delay set in Burny controller.
The dive occurs on straight runs when the machine is NOT cornering. Only get about 1.5" of cut before crash. Pierce delay is turned off when we restart IN the kerf (cut).
We were finally able to get good stable arc volts and no crash at about 140-145 arc volts. The cut profile of the part suggested the torch was actually a little too low. "Positive" cut angle I think is the term. With the large dimension being at the top of the part. This angle was more noticeable after the first corner.
So my questions are:
How much torch height difference SHOULD one expect out of a difference of 15V?
Should I be looking at the voltage divider? I think I found it in the ignition console, not the power supply as some setups have. Theres a line for the CTP from the torch cap, P+, P-,S+,S-. Our THC takes a 1/40 division, so I think I can test this as S+ and S- should be 1/40th of P+ and P-, right?
Or Maybe cut gas problems? The torch leads on this torch are at least 6 years old. The other torch leads have been replaced after cut gas and coolant leaks at the torch body end.
I haven't called Hypertherm or Kaliburn because I have yet to isolate either of their systems as the cause. Any help would be appreciated.
Or is my positioner/encoder to blame?