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DIY foot pedal

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DIY foot pedal

Postby Gmc427 » Fri Mar 10, 2017 6:15 pm

Hi, new to forum,looking forward to picking out up some skills and info on how to be a competent welder, can somebody tell me if putting a knife switch on the earth for a lift arc machine would be the same as breaking the torch lead as Jody does with his foot pedal? Thanks and regards George
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Re: DIY foot pedal

Postby Keith_J » Fri Mar 10, 2017 6:40 pm

The switch will arc. Won't last long. Remote machines have both switch and potentiometer so as the control is turned off, the current goes to a minimum. Inverter machines use IGBT (a type of transistor or electronic switch) so arcing isn't an issue. Yes, they get hot.

Breaking the workpiece connection under load could be dramatic. As in a nasty arc flash.
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Re: DIY foot pedal

Postby Gmc427 » Fri Mar 10, 2017 11:52 pm

Hi thanks for reply,I have a inverter machine,so ok to break earth,or is handpiece better?regards
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Re: DIY foot pedal

Postby sedanman » Sat Mar 11, 2017 3:34 pm

I made a wooden foot pedal like Jody's, I use mine with an inverter on the torch side. The work lead "earth" side would work just as well. You won't hurt the power source either way,
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Re: DIY foot pedal

Postby Gmc427 » Tue Mar 14, 2017 6:04 am

Thanks for info,I'll give it a crack
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