Proma THC 150 Help

[buckmaster1967]

Hello,

I am getting very close to success. But my torch touches down, rises up about 3/8", then lights and takes off for a few inches cutting. But starts rising to over 1" and loses arc. When it goes to the next cut, it touches down and repeats, the last cut it stays contacted with the metal. In Sheetcam, I have the torch hight set at .o200. Why can't I get the torch to stay closer to the metal? Why would it start rising after it starts cutting? I have the THC setting on default settings. Feeding straight from the lead on the front of the Everlast 60s plasma cutter. Appreciate and advise.

 

[Ross]

This might help I found it on a forum. (Plus use a meter on your high voltage leads from plasma machine to Proma to find the arc amps)
From Ross.

Re: THC Settings

Post by acourtjester Sat Mar 07, 2015 1:16 pm

It is not really a calibration it is more a configuring to you operation.
Using the front 2 buttons you step through the setting 3 to be exact.
Normal display is the set arc voltage that you plasma unit has for best cutting.
push the 2 buttons together and go to the next selection called HYS (shown in the display) this if the tolerance or spread of voltage. If you set it to 4 volts it will react when the voltage moves 2 volts above and 2 volts below the set volts.
push the 2 buttons together and go to the next selection d-t in the display called delay time this is for it to detect the arc ok in 0.1 of a second from 0.1 to 9.9 There is nothing else to set.
when you want to set these you must hold the buttons down and watch the display as it moves through the choices. You must start from the beginning each time. Each selection will clear itself after a short time and go back to the - - display if you don't enter in a choice. If you run the tSt mode to check the arc, up, and down signals you must push the buttons from the start again to go the end to stop the test function.
--------------------------
I have the exact same problem as the LeuvenWillys, where the book says 130 Volts, but in reality I have to dial the THC back to 91 Volts to cut at the correct torch to work height.

I calibrated mine using a 5v dc power adapter and a volt meter. It was about 4 volts off, but It doesn't answer the 91 vs. 130 question
------------------------
D-T 1.5
HYS 4
H-V is height control, Torch to job.

 

[buckmaster1967]

Thank you for your time to reply. I have seen this info before. (I have the exact same problem as the Leuven Willys, where the book says 130 Volts, but in reality I have to dial the THC back to 91 Volts to cut at the correct torch to work height.) But this got my attention. I dropped the voltage down to 120. It worked better but still had the height issue. Come to find out, my settings on my Z drive was way off. On the controller it was showing it was moving up .125" but was actually .5" off the work. I have never checked it from the first time I had it set. 3 updates ago. Once I get it calibrated , she worked great! Made my first successful part! Still lots to learn, but WooHoo!It works! Thank you again.

 

[Ross]

Happy to here it is working for you.

One step forward, two steps backward for me! I will be at it again tomorrow trying to get it to work.

From Ross.

 

[jcoldon]

were are you guys getting the voltage settings your using for your proma if it hypertherm that not going to work with the same in other cutters

you would have to make test cuts no thc at cut height and make notes . speed height metal type all have have diferent voltages

this is were hypertherm shines you pay for all that information they did on there cutters .. china like everlast your never going to get a good voltage read

the only other cutter that are good are thermal dynamic and the hps plasma cutter the china one it hit miss .