Re: Arc welder as cnc power supply for Series 1? Anyone try it?
Originally Posted by
cnc1000
Hi,
so far as I know. I'd put it back in, drive it with 3 phase power, and have 3 secondaries, each with a bridge rectifier and a capacitor. No real gain in summing them, but I could.
cnc1000
3 Phase rectification is quite a bit more efficient than 1ph where the ripple on 1ph is 100% and 120Hz, on 3 ph it is < 30% and 360Hz ripple, so less smoothing in the way of capacitors is needed.
As others have stated, a SMAW welder is constant current - variable voltage, if the voltage were to be maintained without collapsing as it does, it would be impossible to weld satisfactorily, TIG and MIG use a different technology.
If you have 3ph available but require a lower voltage, instead of one transformer, you could use 3 small 1ph connected together, a bridge rect. and small electrolytic and you have a supply.
(A 3ph transformer does not exist, it is really three 1ph on one frame!)
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.