THCAD-10 + hypertherm 45 (nonXP)

Im in the process of setting up the thcad-10 as well. I ordered a cable from hyper therm and have to pick it up today.
Can I just hook up the cable to the pm45 and the other ends on to the thcad card and 7i76. Or do I need to add resistors like this? thanks for all the help guys.

Hello, you don't need resistors, you can just hook it up.

The above was a specific discussion about improving resolution (or at least the possibility of attempting to do that)

Rob

andypugh wrote: Bear in mind that the _actual_ voltage isn't that critical as long as you know that your machine cuts material A best at a setting of "100 Rob Units" all is well.

Yes that is correct, the numbers don't mean much really

I have a neuron lite thc and that can both use a "setpoint" and "sample + hold"

The sample and hold works on the principle of torch fires, arc stabalizers, arcOK signal goes active, pierce delay active, after pierce delay, torch decends to cut height and motion begins (THC is locked, no up or down movement) and after a thc delay period (to allow the voltage to stabalize ), the neuron samples the voltage and tracks that voltage whatever it is until the end of the cut.

Rob

Here is the THCAD-10 hooked to a hypertherm 45. (making a 1 inch square without thc yet.) Just playing around. The voltage is scaled and offset using a single scale component in hal. The left is the pierce - the right is overlapping cut. The middle keeps a pretty consistent voltage on a flat piece of metal - 1/4 thick steel. first couple cuts.. (what ever the hypertherm book said - about 60ipm)

Just getting a feel for plasma cutting - I have run systems - first time setting up.

Nice,

Hmm - now you got me wondering if I am measuring actual voltage (the 100k input impedance of the thc-10 steering the 0-7v out of the hypertherm) (the 60ipm cut at 45A and 1/4 thick is showing 110ish volts)

easy enough to test - measure the voltage out of the signal unplugged from the thc-10 and compare to the plugged in.

sam