New Project with Mesa 7I96 and THCAD-05

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25 May 2021 05:06 #210184 by TexasCNC
Thermal dynamics customer support said that maybe wiring the ok to move or arc pins to relay on low side that could maybe work but I not sure how to do that for an input pin on board.

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25 May 2021 05:19 - 25 May 2021 05:19 #210186 by PCW
Can you plot the arc-ok input signal in halscope to get some idea of what's going in on?

This is not normal, and suggests a grounding issue or similar

So right now I have hooked up like you have above and I am reading 24v on input pin on board. And the led does not flicker but as soon as I hook up the ground clamp it flickers same with float switch and breakaway switch. Which are on my inputs there on board.

If its connected as I suggested you should read 0V at the 7I96 input until you get the ARC/OK signal
Last edit: 25 May 2021 05:19 by PCW.

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25 May 2021 13:34 #210222 by TexasCNC
Yes that’s how I have it wired but I am checking voltages and I have 24v on inputs on idle then when float switch gets activated it goes to 0v same with breakaway switch. On arc ok pin I have 24v. You telling me that the pins need to be seeing 0v and all my input pins? If so then I would need to see about my wiring but my float and breakaway are working fine I have the wires wired in a N/O state on switch for float and breakaway I have it wired in N/C state.

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25 May 2021 14:00 - 25 May 2021 14:19 #210226 by PCW
I would have thought that ARC-OK (OK to move) was normally open
so you would expect to read 0V and the 7I96 input until the arc is established
Last edit: 25 May 2021 14:19 by PCW.

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25 May 2021 14:52 #210229 by TexasCNC
Yes but I think what’s going on is that since it’s reading 24 volts already on all inputs port cause I checked with my meter my float switch and breakaway I need to switch the wires that way they read 0v and when the switch activates it will 24v. But why am I ready 24 volts and all ports though?

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25 May 2021 14:54 #210230 by TexasCNC
This is the way I have it wired. I need to switch the wires on float and breakaway that way at idle they ready 0v an input pin. You think that’s the reason the arc pin is flickering?
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25 May 2021 15:52 - 25 May 2021 16:09 #210235 by PCW
If input 10 of the 7I96 is at 24V without ARC OK present, there is a wiring error
possibly a missing ground
Last edit: 25 May 2021 16:09 by PCW.

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26 May 2021 04:04 #210301 by TexasCNC
I fixed the wiring on my switches for the inputs and now reading 0v at idle then when the float activated it reads 24v. I checked my arc ok cables and still getting the flickering I called TD again today and they said that 12 and 14 are just a dry contact and I did a continuity test on the wires and they all test out good. Something is up with the interface board or my plasma cause it’s just flickers when I hook up the ground clamp to table.

I am not looking at buying another interface board or plasma. The plasma works fine with the proma so I will be doing away with the Mesa boards and thcad-05 and thcad-10 i am sure they work great when working but didn’t work out for me cause of my equipment. So if anybody is interested in a Mesa 7i96 and 2 thcad cards let me know I willing to ship wherever.

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26 May 2021 10:08 #210327 by bevins
You're giving up?

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26 May 2021 12:17 #210337 by rodw
At time like this its a good idea to have a few days away from the machine before coming back to it.
I have a Thermal Dynamics working with 2 x thcads and mesa hardware and its worked perfectly for me.
There has to be something you have missed somewhere.

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