Re: [CAD_CAM_EDM_DRO] Power Supply

"C.S. Mo" wrote:

>
> I'm trying to find a reasonably inexpensive power supply that can drive
> three servo motors with a power draw of 60V/14amp each. I'm figuring that
> I want a power supply in the 60V/25amp range..
>
> Any thoughts?

I am thinking that you are over-estimating the size of your PS requirements.
I just put my 1.5KW power supply on my 12,000 lb class cnc lathe. This 1.5KW
supply gives 23 instantaneous Amps at 65V or around 30Amps at 50V when it gets
loaded down. Each motor there takes 65V at 20A continuous, 90 amps peak, weighs
about 50 lbs each, and has a 4000 count-in-quadrature encoder from USDigital
which gives us 50 millionths steps on a 2" dia 5 TPI ballscrew.

So you must have quite a machine there to require such a big power supply!

We're using the Gecko G340 driver with a 20A limit, but so far that seems ok.
I also am using the heatsinks too, to be safe.

Note, my usual supply is 1KW 75VDC for Geckos, but I also do custom ones
for special circumstances, like the above (ie 1.5KW for the capacity, and 65V
because of my pre-existing 65V motors).

Doug Fortune
http://www.cncKITS.com