THC enabling. Are we doing it wrong?

rodw wrote:

www.plasmaspider.com/viewtopic.php?f=3&t=13359#p78176
Jim Colt says:

6. Once the machine achieves the programmed x - y cut speed, the height control starts monitoring the DC arc voltage (as measured between the plasma torch negative electrode and the positive work cable) and compares the actual arc voltage to a preset arc voltage (as suggested by the plasma torch manufacturer for the material and thickness being cut), then the height control adjusts the z axis so that actual arc voltage and preset arc voltage are essentially the same. If actual voltage is too low...the z axis indexes up until the voltage matches the preset.

Its occurred to me recently that the piercing voltage spike we see is probably heavily influenced by acceleration. So a fast accelerating machine will get to cut speed faster and once it does voltage should stabilise. Here is Jim confirming that.

Where is our test pilot? this would be a perfect opportunity to learn how to use halscope and monitor torch voltage, current velocity and feed rate and see if without a THC torch voltage stabilises when you get to cut velocity. If it does, we could get rid of the THC delay and enable it at cut velocity (or some small delay after that is reached).

The more we simplify operations, the better I think!

rodw wrote:

phillc54 wrote:

If that is the case you could get rid of the delay now as it doesn't sample the arc voltage until it has reached 99.9% velocity.

Exactly my point! But when does it enable the THC?