Hypersensing with THCAD - better way to do ohmic sensing

Hmmmm that is new to me, thank you PCW.
I was under the impressions that the probing is switched off before firing the torch.
Adding a relay will solve that issue.
Now i have to wonder, if the probing THCAD is on all the time, the use of another THCAD seems redundant.
Will think about it a bit, while waiting for my THCAD's to arrive.

Water is not a software issue, and there is nothing in software to fix that.
And i do get that using relays will defeat the purpose of THCAD, so back to the drawing board.
Also i am sure it is an issue as i have seen it used only on downdraft tables, never on water tables. But that will not stop us from trying to get around it and find something usable and reliable. Oh i miss my THCAD's.........

An interesting quote from John in this post

I know there has been a lot of discussion at times about "false" triggering of ohmic sensing. I can say with certainty that I have never had a problem with this that was a true false trigger. Yes, I have probing errors all the time but they are always caused by a flooded torch end or dross stuck in the torch end. So the probing errors are always cause by a true shorted torch which is why you check for that condition before the start of probing..

rodw wrote:

phillc54 wrote:

An interesting quote from John in this post

I know there has been a lot of discussion at times about "false" triggering of ohmic sensing. I can say with certainty that I have never had a problem with this that was a true false trigger. Yes, I have probing errors all the time but they are always caused by a flooded torch end or dross stuck in the torch end. So the probing errors are always cause by a true shorted torch which is why you check for that condition before the start of probing..

I'm pretty sure that is why John made you add the probe test button to the GUI so he could check for a shorted torch before running a job. Press the button and if the ohmic light came on, he had a problem.

Exactly...

rodw wrote:

tommylight wrote:

Water is not a software issue, and there is nothing in software to fix that.

Tommy what about softwater instead of software????

None of that around here, we use plain hard water from the surrounding mountains, it has plenty of calcium and other minerals in it!
Back on subject, or subjects as this is going on on two separate threads and causing a lot of chasing around, can you do a plot of the THCAD5 raw voltage from the time a probe is issued till it finishes, please ? I would like to see the change throughout the process with a dry and a wet torch. Also a plot from the torch on signal to arcok from both THCAD's.
Both of you, please, as it looks one is having much more issues than the other, and he might be onto something regarding his wiring.