Re: [CAD_CAM_EDM_DRO] ac servo motors

Shockley,

An AC Inverter is only capable of speed control. If
you want to do position control with an AC motor, you
need a Vector drive.

Also, don't confuse an AC inverter duty Induction
motor with an AC servo....the only similaritis between
the two is that they both spin and both use
electricity.

Baldor has some good info on all kinds of motors
http://www.baldor.com/support/literature_manuals.asp

Tommy


--- shockley333 <shockley33@...> wrote:

> Hi all.
>
> I have to build a precise positioning device.
>
> I am experineced with stepper, but now going for
> servos.
>
> Having actually decided for dc brush, i have
> although guessed about ac
> induction.
>
> There is a plenty of rumors about using them for
> cnc, and in my case
> another major reason is great availability of small
> power commodity
> units at a good price.
>
> But what about drives? There are a lot of inverter
> ac speed
> controllers, but for positioning...
>
> I have just got a glance at Advanced Motion Controls
> drives, but I
> don't know if I understood well.
>
> Are these drives capable of position control of an
> ac induction motor?
>
> Has anyone experience of such devices?
>
>
>
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