Re: so how many of you got these before they sold out? (AC SERVO)

I looked at those drives on eBay, but since the Surplus Center
servos were 100vac type, I didn't think these were
applicable...since they were listed as PWM types, I thought they
were DC Servo drives.

Even so, I don't really know what to look for in specs for drives
suited to these motors. (I got 3 of the 400w)

Tom




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "skykotech" <rick@s...>
wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> <dave_mucha@y...> wrote:
> >
> > AC servos ?
> >
> > What driver do you use for those ?
> >
> > Dave
> >
> >
>
> The link to the motor is here:
> <http://www.surpluscenter.com/item.asp?
> UID=2005102317542128&catname=&qty=1&item=10-2210>
>
> I may be wrong, but I believe there is no such thing as a DC
> brushless servo. It would not move. Brushless servos require
> electronic commutation (because they don't have brushes, heh

heh).

> There are drives that do trapezoidal commutation and those that do
> sinusoidal, so maybe that is where people get confused?
>
> I am really bummed that I didn't bid higher on these...got sniped

in

> the very last second..probably by one of you guys *grin*
>
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7554458461
>
> I think they would have been absolutely perfect for these motors.
>
> Oh well.
>
> Rick
>