Re: [CAD_CAM_EDM_DRO] Aerotech Servo Motors?

Jon,

If i sent you a picture of my servo...could you tell where to connect the
wires?


Thanks, Robin

I have the same servos as Gregory on my Aerotech X Y Stage.

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, December 18, 2003 1:23 PM
Subject: Re: [CAD_CAM_EDM_DRO] Aerotech Servo Motors?


>
>
> Gregory Kamysz wrote:
>
> >I'm hoping somebody will have some info.
> >
> >I just picked up a 2 axis table setup with servo motors. It's made up
> >from two Aerotech ATS412 slides. They each have an Aerotech 1000DC
> >series 1075 motor with tach and encoder. I guess the tach is not
> >required with Gecko drives. The encoder I'm not sure about. It was
> >made by Datametrics, which I couldn't find any information on. The
> >glass encoder wheel is marked 1000K3 which is the similar to the part
> >number K3DM-1000. The board seems to have 5 output wires none are
> >marked channel A or B. Should I just replace the Encoders with US
> >Digital units?
> >
> >
> Not if you can figure out how to make it work. These are almost certainly
> 1000 line encoders, giving 4000 count/rev. Why replace them with low
> resolution encoders? If you've already had the cover off, follow the
> wires and see if there is a large capacitor connected between two of them.
> If that capacitor is an electrolytic, it will have polarity marked with
> either
> a + or - sign. You should then be able to apply +5 V to the + wire, and
> gnd to the - one, and observe encoder signals on the others. With 5
> wires, there's
> a good chance there is A, B and index (plus 2 power wires, of course).
> If no polarized cap is visible, there still almost HAS to be a capacitor.
> But, it won't tell you the polarity. You can try using a DVM on diode
> test between those leads, and see which way it conducts. If there is
> no conduction one way, that may be reversed polarity. If there is
> conduction
> both ways, the higher voltage reading (on diode test) might be the correct
> polarity, bit it is still a bit iffy.
>
> >If I connect these to a Gecko is there a possibility of damage to the
> >drive if they are not compatible?
> >
> >
> Since the Gecko supplies encoder power, it is less likely, but possible.
> But, if you are able to get it powered up as I wrote above, you'll be
safe.
>
> Jon
>
>
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