On Sun, 24 May 2015 10:41:18 -0500, Karl Townsend
wrote:

I tore the machine apart. Pot runs smooth 0 - 12K ohms. Also tested
panel/remote switch, its fine.

Other ideas before the scrap man gets it?

Karl


pics here
http://www.hobby-machinist.com/threa...-repair.35668/

Checked the diodes as the gentleman suggested?

I just did a little google search...you may wish to read this

http://weldingweb.com/showthread.php...300-300-No-Joy