Welding Tips and Tricks

Converting a ac welder to dc via 300 amp rectifier, my question is will this be dc positive or dc negative thanks in advance

Sent from my SM-S727VL using Tapatalk

It will only depend on where you hook your cables. Hook your electrode holder to the positive side for DCEP.

What kind of rectifier are you using? I see some really cheap units <$50. I doubt they produce a smooth dc line. It will need some sort of capacitors to help smooth it out. Im curious. Let us know how it works

Sent from my SM-G930V using Tapatalk

Most welders use a choke you add capacitors too.

Dave

Add a choke (inductor) if you are converting a constant current machine like a stick welder, and avoid too much capacitance. Add capacitors if you are converting a constant voltage machine and do not add too much inductance. Inductors steady the current flow and capacitors steady the voltage.

Yes a choke with lot of turns is for stick welders.

But a choke (aks Reactor) with few turns with give a smoother DC .

Some old books on MIG with take about adding turns (also choke) for smoother welding.

Today if look most CV welder they will some type of choke / Reactor.

Dave