Low budget plasma setup, what do I need?

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27 May 2019 09:42 #135051 by pl7i92
the firer voltige is about 240V
the cut voltige will be around 112
so it is fine to get direct as the othere thc do so
and the 300 version is clar up to 5000volts on egnigting /M3

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27 May 2019 09:45 #135054 by tecno
Vielen dank

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27 May 2019 10:17 #135059 by rodw
Pilot arc is a great start but don't assume it has a CNC interface and voltage divider. There has been quite a discussion recently by JTKnives and PhillC who both have a Hypertherm 30 XP about how to install the THCAD with their machines that do not have a CNC interface or divider.

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27 May 2019 10:19 #135060 by tecno
So you say that my TCHAD300 will not fix this or?

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27 May 2019 11:59 #135066 by rodw
It'll be fine I think. Best to install it inside the case and attach to the electrodes. Send 5v down the cable to power it and receive the frequency back for the encoder.

For ArcOK, you can just put a hall effect current senor around the anode clamp cable. Others will know a bit more about this.

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27 May 2019 16:17 #135070 by billykid
for arc-ok I used one of these, recovered from a broken plasma.
in practice it is a contact in a glass bulb that closes with the magnetic field that flows in the coil, it is inserted in series to the positive and generally closes already with 5 amps.
for information inside the machine it is used for the transferred arc signal
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28 May 2019 00:34 #135101 by tommylight
Billy, that is a "reed relay" and the nice thing is it is fully isolated.
Pl7i92, firing the arc on plasma machines is usually at 2000 to 20000V, depending on the type, but they do have protections in place so they do not blow the rectifier.
Wiring the THC should be done as close to the rectifier as possible although wiring it at the main terminals works, but a bit risky.

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28 May 2019 09:51 #135144 by billykid
sure Tom, I used that quietly because my plasma doesn't have hf but I think that even hf doesn't give problems since this reed is also used inside hf machines.
this is just an idea then you need to be sure of what you see the danger to things and to us :-)

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28 May 2019 11:20 #135154 by tecno
I need some help from someone in Germany. I am looking at this combined TIG/Plasma

www.lcdvision-schweisstechnik.de/navi.php?a=888&lang=eng

Been writing to the company but I get no answer at all.

Can somebody make a call and wake them up and ask them to answer my emails sent from This email address is being protected from spambots. You need JavaScript enabled to view it.

Thanks
Bengt

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29 May 2019 10:24 #135259 by tecno


This pisses me off when nobody answers emails.
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