"Ignoramus8285" wrote in message
...
On 2009-03-31, Richard W. wrote:
I got a 400 amp Lincoln power supply and I am pretty sure my rotary
phase
converter is to small to run it. It's an Idealarc R3S-325 and I down
loaded
a copy of the manual and it say it will draw 51 amps. Any one try running
one of these on a rotary phase?

My rotary phase converter is an older factory built unit. It has 3 switch
positions. Center is off. Up is "Start" and once it's running you push
the
switch to down. There is no markings that I have found on it. It's is a
large unit and runs my lathe just fine. My lathe is 7 1/2 HP. The
question
is really will it run my welder. I plan on using .03 solid wire most of
the
time, if not all the time. I will probably never run it turned up all the
way.

The nice thing about welders, if they do not have power factor
correction, is that you only need the phase converter to match your
welding parameters, not the maximum size of the welder.

If your phase converter can run a 7.5 HP lathe, it can probblay make
your welder produce appx. 5.6 kW of output. At 30 volts, it translates
into almost two hundred amps of welding current, which should cover
most of your needs.

I ran a Hobart CyberTig off of a 10 HP idler at some point. Worked
fine. Recently I ran a 650 amp rated welder from a 17.5 HP total set
of two idlers. Works fine, as long as the powwer draw is within the
converter's capacity.

--

So if I run the lathe motor it should be even better?

Richard W.