plasma control panel

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10 Feb 2021 21:44 #198327 by thefabricator03
I gave up on the 320X drive but mostly because I could not find a quick solution to setting up the error and reset functions and I needed that in an industrial environment for safety.

Looking in my thread about setting them up and one guy seems to have worked it out using classic ladder. I will admit that is a pretty clever way around the problem. At the time I did not know enough about LinuxCNC to understand how that would work.

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11 Feb 2021 07:02 #198358 by rodw
Replied by rodw on topic plasma control panel

At the time I did not know enough about LinuxCNC to understand how that would work.


I don't think I'd know enough either!

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29 Mar 2021 17:41 #204078 by txtrone
Replied by txtrone on topic plasma control panel

I have just finished wiring my new closed loop stepper drives into my control box and added Rods hyper-sensing circuit.
I have attached a updated wiring diagram to this post for anyone that might find it useful.


What happened to the 220k resistor on the arcok? thx

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30 Mar 2021 13:48 - 30 Mar 2021 13:48 #204123 by rodw
Replied by rodw on topic plasma control panel

I have just finished wiring my new closed loop stepper drives into my control box and added Rods hyper-sensing circuit.
I have attached a updated wiring diagram to this post for anyone that might find it useful.


What happened to the 220k resistor on the arcok? thx


90-100 ohm, 10 W.

ArcOK is seperate to hypersensing and it seems not all machines need it. But maybe one day they will decide they do...
Last edit: 30 Mar 2021 13:48 by rodw.

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30 Mar 2021 13:53 #204124 by txtrone
Replied by txtrone on topic plasma control panel


90-100 ohm, 10 W.

ArcOK is seperate to hypersensing and it seems not all machines need it. But maybe one day they will decide they do...


So, Fabricator's final schematic is missing the ArcOk resistor?

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30 Mar 2021 13:59 #204128 by rodw
Replied by rodw on topic plasma control panel
I'm not sure many do add it as its a fairly recent learning. I think his build predated that point.

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30 Mar 2021 14:09 #204129 by txtrone
Replied by txtrone on topic plasma control panel

I'm not sure many do add it as its a fairly recent learning. I think his build predated that point.


In this thread, post #134766, he had a 220 ohm in the schematic. By post #148670 there was no resistor. That was the one I was asking about... just to make sure we are talking about the same thing.

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30 Mar 2021 22:16 #204154 by phillc54
Replied by phillc54 on topic plasma control panel
I think a better idea is to do as PCW suggests and use a 1uf capacitor.

forum.linuxcnc.org/plasmac/40819-arc-ok-...fire?start=50#191678
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31 Mar 2021 18:10 - 31 Mar 2021 18:20 #204253 by txtrone
Replied by txtrone on topic plasma control panel

I think a better idea is to do as PCW suggests and use a 1uf capacitor.

forum.linuxcnc.org/plasmac/40819-arc-ok-...fire?start=50#191678


I read what PCW had to say... it's a little bit above my pay grade. Is he (I assume it's a he) saying that the 1uf cap would prevent the problem that the OP (and others) were trying to correct with resistors? ... I believe it was the buildup of some sort space dust in the flux capacitor they were trying to blow off.
Last edit: 31 Mar 2021 18:20 by txtrone. Reason: Clarification

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31 Mar 2021 21:58 #204318 by rodw
Replied by rodw on topic plasma control panel

I think a better idea is to do as PCW suggests and use a 1uf capacitor.

forum.linuxcnc.org/plasmac/40819-arc-ok-...fire?start=50#191678


I read what PCW had to say... it's a little bit above my pay grade. Is he (I assume it's a he) saying that the 1uf cap would prevent the problem that the OP (and others) were trying to correct with resistors? ... I believe it was the buildup of some sort space dust in the flux capacitor they were trying to blow off.


Did someone mention a dusty spaceship?

Yes, if a relay is switching a low current, space dust or oxide can build up on the relay contacts which can result in intermittent/failed operation. The relay manufacturer's specify a minimum current that is sufficient to "burn" off the oxide so it does not form.
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