CIgweld Cutskill 60 - adapting to CNC use

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5 years 7 months ago - 5 years 7 months ago #203922 by Joco
Get the creation of the paths back to ground for EMI. Given this ground is essentially anchored to the table which is connected to the work lead. I guess I just accept it all works. But given the work lead is Positive in the plasma circuit it feels a bit mind bendy to have that connected to ground.

If we assume I will not have a big ass ground spike I am directly linking to what is the expected ground link? The plasma work lead? Or a separate link back to the garage wirings earth circuit? Or something else? Anyone posted a circuit diagram with some plain english annotations?

Cheers - James.
Last edit: 5 years 7 months ago by Joco.

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5 years 7 months ago #203928 by rodw
Try this

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5 years 7 months ago #203978 by Joco
Thanks. The schematic on page 5 makes it all clear.
The following user(s) said Thank You: rodw

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5 years 7 months ago #204323 by Joco
Just a short little post on the insides of the Cutskill 60. The attached image shows the two key control connectors. I'm just working out the best way to splice into the loop that gives control of the torch on/off.

Any ideas welcome.

You can also see the torch connector in the lower center/right of the pic. Looks like it shouldn't be too much of a drama to get a lead off that and (hopefully the work lead which is behind the circuit board out of sight) to be able to create a voltage divider to feed the THCAD that will be mounted (I hope) inside the unit.

Cheers - J.

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5 years 7 months ago #204328 by rodw
YOu don't need a voltage divider. Just use the THCAD with an appropriate scaling resistor

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5 years 7 months ago #204347 by Joco
Another example of my lack of electrical whatsit.
Isn't the THCAD part of a voltage divider circuit? At least on its input side of things. With the scaling resistors essentially being part of that voltage divider circuit?
Or is there some other form electrical circuit in the mix that is essentially doing the same job? :blink:

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