Problem with THC

I do not, i set automation off, play with voltage till i get roughly good cuts and THC properly tracking, sometimes a bit of editing the scale and offset to match the measured voltage (ranges from 97V to 135V depending on the source and nozzles), then:
- fine tune the cut height by changing the voltage in 2V increments up or down
- fine tune the feed rate
- fine tune the air pressure to get clean cuts on the bottom side (less dross)
All this should be done whenever changing material thickness/type, nozzle diameter/type, and/or plasma source eventually. Also will be influenced by the amount of moisture in the compressed air, sometimes enough to cause issues.
And i never use autovolts, mainly due to many external factors that i have no control over, like, huge power fluctuations, huge differences in material being cut, above mentioned moisture, old air compressors spewing oil through the torch, using old plasma sources with no current control, etc.
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Another thing that will absolutely mess with cutting is the ground clamp, it has to be properly bolted to the table, no clamp.

I just discovered that my formula and the one in the QTPlasmaC documentation ids not correct for the THAD2. Those formulas work for the previous release of THAD.
PncConf has the correct formula by the looks of it. Does any have the correct formula for me?

this is the process I followed to set up a hyperterm 85 SYNC
1 Make sure the Z axis is properly calibrated including trabvel switch if any.
2 Make sure table is properly laveled, so the plate to cut is always perpendicular to the torch
2 From hyperterm Cut tables select a metal plate in the midle range of the plasma power supply and set up the parameters in the proper tool.
3 Disable any THC feature including THC itself.
5 Cut a line of a length that allow you to record the voltage on the screen (May be 8 or 10 inches long), using the previusly ste tool.
6 Adjust the voltage scale to reflect the voltage in the cut table for that cut heigh.
You can repeat with a thicknes on the high range and then one in the low range and then make an average.
this method has worked to me don't need to many maths but for sure should be anothers that work.

That makes sense. Thanks. I always use the "Autovolts" option and has always been good enough but in this case there are complications that I have to catch so the manual calibration is required.

The THCAD2 is scaled the same as a THCAD-10 when jumpered
for 10V full scale and scaled the same as a THCAD-5 when jumpered
for 5V full scale.

mariusl wrote:

I just discovered that my formula and the one in the QTPlasmaC documentation ids not correct for the THAD2. Those formulas work for the previous release of THAD.
PncConf has the correct formula by the looks of it. Does any have the correct formula for me?

Have you looked at the THCAD2 manual? the formula is in it,