Re: [CAD_CAM_EDM_DRO] Re: How do you connect AC servo motor up

While they are inexpensive, you can probably do better in terms of
usability. I'd look for a name brand servo that has easily available
documentation.

On Thu, Jun 17, 2010 at 14:42, cnc_4_me <cnc4me@...> wrote:

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> --- In CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>,
> Jon Elson <elson@...> wrote:
> >
> > cnc_4_me wrote:
> > > Do AC servo motors all have same pinout on them for wiring as in
> universial connector. If not, how do you figure out wiring for a surplus
> motor.
> > >
> > No, it is a LOT more complicated. Usually the motors are 3-phase,
> > permanent magnet, but there can be other types.
> > It is common to have Hall sensors for commutation, but not all motors
> > have these sensors. There are several schemes
> > for orienting these sensors to the motor poles. The motors typically
> > have 8 poles, but some may have other pole counts.
> > Encoders have all sorts of combinations available, some have the
> > commutation tracks and some don't, etc. If the encoder has
> > the commutation signals, then the alignment of the encoder to the
> > motor's poles is critical. Also, some motors, such as Yaskawa,
> > Panasonic and Fanuc often have something proprietary about the
> > commutation or encoder signals.
> >
> > So, not only is the connector totally NOT standard, the signals
> > themselves vary quite a bit.
> >
> > Jon
> >
>
> You sure know how to depress a man. So much for undocumented Ebay motors.
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> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220385535101&ssPageName=STRK:MEWAX:IT
>
> These are the ones i wanted to get. But i can not find word one on them.
>
> cnc4me
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