Radiant heat and the S45 torch

**KHK** · 08-07-2011, 06:29 PM

I cut some rectangular holes in some angle iron. The cut outs were small and the cut was slow. This allowed the radiant heat to cause problems with the torch tips. It was so hot that I could feal the heat from 12 to 16 in away. A water table would have helped, but I don't have one. The torch was modified by me using PVC as the main body of the torch. The PVC got soft but never failed. The torch tips and electrodes were in sorry shape...

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**Gadget** · 08-07-2011, 07:09 PM

Keith, did you by any chance forget to connect the ground and cut only with the pilot wire. That's happened to me when I forget to connect the ground.

**KHK** · 08-07-2011, 07:37 PM

Gadget, I don't think that I could cut 9/16 steel with the pilot arc...

Forum problem-The forum said that the sentance above is not 10 char.
Second try!

**Tritium** · 08-07-2011, 08:45 PM

Originally Posted by KHK

Forum problem-The forum said that the sentence above is not 10 char.
Second try!

It told me the same thing yesterday and just now but took it on the second try, although the second try had more verbage it posted the first try verbage (WEIRD). Both days.

Thurmond

**Gadget** · 08-08-2011, 07:14 AM

Ok guys thanks for the posting issue feedback. I've been working with SICFabrications on the same issue and thought it was just something on his end. I've reported this to the developers.

**tigqk** · 08-12-2011, 01:29 AM

I think you are clearly exceding the ability of the torch and should maybe change torches to one of the other models offered or stop using it on such thick stock.

**KHK** · 08-12-2011, 09:11 AM

Originally Posted by tigqk

I think you are clearly exceding the ability of the torch and should maybe change torches to one of the other models offered or stop using it on such thick stock.

If I were to do the same cuts againg I would stop the CNC about 1/2 way through to allow the work piece to cool.

The piont of the post is to address radiant heat. I have cut 1/2in stock in the CNC. The cut was a cut of about 20in streight. The torch/tips/elctrodes worked very well.

**tigqk** · 08-14-2011, 01:24 AM

Not sure how the result may be, but how about taking some brake tubing or brass tubing and making a round ring an inch up the handle for those occasions when you are using the machine on thick stock and drilling small orfices to spray cooling air down at the torch where it does not interfere with cutting and see if that helps, or even perhaps two flatten tubes, flared and pointed at the copper contact base to see if it resolve the cooling problem.If it doesnt perhaps a torch with ceramic nozzles.