Re: [CAD_CAM_EDM_DRO] AC servo motor project - encoder problems

Thanks again Jon,

I am setting up a multichannel chart recorder which allows 8 channel
simultaneous
recording through an analog to digital converter to a computer.
Hopefully I can
see what is happening on the two encoders. I am going to give a try to
making this
motor work unless I find an 08A3 motor with the proper encoder. I found
this
afternoon that there is what I think is a commutator signal on some of
the encoder pins
so I am a little encouraged. The recorder experiment will be very
interesting.

Keith Clark



Jon Elson wrote:

>
> Keith Clark wrote:
>
> >Jon,
> >
> >Is it possible to create a circuit to generate a third channel Phase C
> >and inverse C
> >from channel U, V, W output?
> >
> >
> It is at least possible. I do not understand the details of the Yaskawa
> scheme, just
> the basic concept. You'd have to get the details either from patent
> info or from
> scoping out the signals. Then, you'd have to "align" the Yaskawa
> arrangement
> to the other motor's pole vs. Hall signal arrangment. It could be done,
> but it will
> not be trivial, unless maybe Yaskawa has actually published how to do
> this, and
> I rather doubt it. I think a major part of this proprietary arrangement
> is to keep
> you from using other maker's motors. (It does eliminate 3 signals,
> though, so that
> could be argued.)
>
> Jon
>
>
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