Ebay 3 phase

[Scott V]

I was talking to the Thermal and now Esab reps about this unit.
He told me these units are about one of the finest welding machines ever built.
I will be getting three phase soon and I am sure tempted.

Anybody else agree or disagree with the esab rep? :D

http://cgi.ebay.com/Miller-MIG-Welder-CP250TS-CP-250-Power-Supply-3-Phase_W0QQitemZ7554560859QQcategoryZ113743QQrdZ1QQ cmdZViewItem#ShippingPayment

[joebass]

I am also looking to buy the CP 252 TS if I can find a good deal within a few hundred miles. It is the model that replaced that one. I havent used one but have heard the same things as you. I must admit, I was expecting to open this thread and see an Esab unit. I'm also looking for a newer used Goldstar 400 SS or SRH for a dedicated stick machine and air arc.

[Scott V]

To tell you the truth, It's nice taking to a rep that happens to know
different machines. He was a Thermal rep/ MK products/welding
teacher. He been at Esab for about a year or so.That means I show him
which Esab machines kick Millers butt. Really none on the ac/dc inverter front and none on the horizon either. He tries to not push their unit
and tells people to buy the 185 Thermal instead. :)

[precisionworks]

Scott - Just make sure your service panel is large enough to run this machine at full power. Many of the transformer units require a dedicated circuit of 100 amps, sometimes larger.

[tigman250]

3 phase machines seem to have a smoother arc than single phase, don't know if there is any truth to this just seems that way.

[Scott V]

Scott - Just make sure your service panel is large enough to run this machine at full power. Many of the transformer units require a dedicated circuit of 100 amps, sometimes larger.

My girlfriends shop will have a 200 amp single phase box/ meter and
At least as big 230/480? volt three phase box/ meter.
I have only researched that three phase is available
for 25 dollars a month and .06 cents a Kilowatt.
If she is not running a pump, no demand meter
needed. They asked what she would be running
and she told them welders. It was cool with them.
They also said anything over a 50 ft run from the pole
would be $ 3.00 a ft. to run. She is within 50ft. I believe.
The other kind of cool thing is, when she ask the head of
the electric company about power, he said just run it
off off your box so you don't have to get a permit. :D
It's a different world then where I am now living. :eek:
The building will be done on 2 to 3 weeks max. They
just ordered the metal.

[Scott V]

3 phase machines seem to have a smoother arc than single phase, don't know if there is any truth to this just seems that way.

Not with a inverter, maybe a better duty-cycle/ output but
not the welding arc.

[admweld]

scott that shop looks huge what are the dimension? also a nice high ceilings any overhead lifting ability going in there?

[Scott V]

scott that shop looks huge what are the dimension? also a nice high ceilings any overhead lifting ability going in there?

It's not quite as big as I wanted because she wanted a tool room/ exercise room too. It will have a equipment bay on the otherside. The total size is 50' by 60'. I had to fight like heck to have her shorten her room size some to get a open
area wide enough to use. I had them put a header in to get rid of one of
the posts. She is going along with the three phase plan so I am pretty happy.
She wanted that style and did not want a box. It will have nice overhangs
with clear panels along the pitch change between the roofs.
Should be a good looking building. The doors are a rollup on one side ( my area ) ;) and a slider on the other. Here is a blurry pic of a earlier construction day.
Also one of her haybunk/ horse stalls ( can't remember the tech name)
I do know the horse's have more pull then I do!!! :confused:

As far as lifting I really want a Truck/car lift. I figure a tractor could
handle the rest for now.

[admweld]

nice shop with nice view of country side now i,m real jealous good luck looks great.

[Scott V]

It's Oregon high desert area but there is lot's of water for fishing. :D
This is picture is the lake below the mountian in the first pic I posted.
Looks like a springtime picture?

[admweld]

wow thats cool don,t look like that around boston area like here

[Scott V]

Here is another few pics down the road a bit.
I am pretty sure this is a no no where you live too!! :eek:
Also one in more pic of her place when the clouds roll in the valley.

http://www.thunderranchinc.com/

[MAC702]

3 phase machines seem to have a smoother arc than single phase, don't know if there is any truth to this just seems that way.
Yeah, a 3-phase machine has no choice but to be a smoother arc, especially noticable on a rectified DC arc because the arc stays near maximum current instead of dropping closer to zero 120 times a second. It would be all the way to zero except they throw capacitors and such in there to smooth it quite a bit, but the 3-phase is already way ahead.

As Scott V mentions, though, a modern inverter machine is different ball game because it rectifies and then reinverts at a very high frequency anyway before rectifying again. The advantage of three-phase power to those machines is the electrical efficiency from the panel and some machines get a higher duty cycle because of the better efficiency during the first rectifying cycle.

My old PowCon currently runs on single-phase, but is capable of 3-phase also. It's an older inverter and the duty cycle is affected. I sure would like to test the 3-phase arc on it though because the 3-phase arc (from 120 Hz too) from my Trailblazer kicks its butt, I just don't have access to 3-phase power currently.

Our current project of building a big rock grizzly with some thick steel has me running the PowCon on cheaper electricity for the downhand, but i find it much nicer to crank up the Trailblazer when I need to run a vertical. The PowCon does it, but the TB makes it a lot more fun.

[precisionworks]

Mac - are the verticals with stick or MIG? If stick, what electrode, diameter, etc.