"stryped" wrote in message
...
I have a hunter DSP 9000 tire balancer for sale near me. But it is 220 3
phase which i dont have. I know there are phase converters available but
they are expensive.

I read somewhere that 3 phase motors can be run on single phase 220, but
the motor start would not work. (You can spin the tire once by hand to get
it going then it would work).

Does this sound correct? What about the electronic read out on the
machine? Would it work on single phase 220 without a converter?

I appreciate it!

In principle, it's correck, altho poss. not practical.

The Self Righteous Spermenberg is partially correct, with a "static
converter" which is just start caps placed between L1-L3 or L2-L3 (L1-L2
being 220 single phase).
Flip them out when the unit starts. Flipping in some "run" capacitors might
help power, effic, but the motor will, as you say, now run off 220 single
phase, BUT at reduced power -- 1/sqrt 3, or some ****.

If you do cobble together an rpc (ie, sep "idler motor"), your unit will
develop it's full power, but at sig'ly higher electric cost, cuz you now
have TWO motors running, and the rpc will generally run much longer than the
machine itself. Altho, you will now have 3 ph power for other stuff.

If the unit can function serviceably with reduced power, I'd go with
switchable start caps. Proly around 100 uF.
If not, you'll have to do a rpc, which is just ANOTHER 3 ph motor, with
switchable start/run caps.

Oh, the electronics:
If you are trying just 220 single phase, you'll have to experiment with the
inputs. Iow, you'll have 3 terminals on the machine, but only two hot legs
coming in. Mix'n'match until you get the controls to work. If they don't
work, then you'll need the full rpc solution.
I think most likely they WILL work. A good indication that they will work
with 220 single phase is if there is provision for a neutral. So don't
forget that, as well.
--
EA