[sdiy] Telharmonium motors, perhaps?

[Tim Parkhurst]

Hello All,

A sine encoder is a very useful thing IF you have drive circuitry capable of
reading the encoder output and using it properly. From what I understand, it
makes it easier to get accurate motor position, direction, AND velocity.
This sounds more like a servo motor, but it looks like a standard DC motor,
so I couldn't say for sure. Also, most motor controllers aren't set up to
work with sine encoders. Here's a little more info

http://www.naic.edu/~phil/mbeam/motor/sinEncFdBack.pdf

Anyway, sounds fairly involved to make proper use of the sine encoders. I
worked for a motion control company for about two years, and the sine
encoder was a fairly rare option.


Tim (rarely fair) Servo
"Imagination is more important than knowledge." - Albert Einstein




> -----Original Message-----
> From: john mahoney [mailto:jmahoney at gate.net]
> Sent: Monday, November 22, 2004 12:47 PM
> To: ASSI; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Telharmonium motors, perhaps?
> 
> > Any information on what exactly is meant by "sinusoidal encoder
> output"?
> 
> Yes! "You can use in speed measurement circuitry if desired." ;-)  In
> other words, the Goldmine doesn't provide any real information on the
> website.
> 
> Motors that I found using Google seem to require 5 VDC for the
> encoder. The output of one motor is a 0.5V p-to-p "sine" wave made
> from 1,024 steps, or something like that. Another motor's encoder
> produced an "RS-422 compatible (linedriver) signal," whatever that
> means.
> 
> Anyone know how these things work, for sure? Not sure if the Goldmine
> is including data sheets.
> --
> john
> 
> ----- Original Message -----
> From: "ASSI" <Stromeko at compuserve.de>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Monday, November 22, 2004 2:46 PM
> Subject: Re: [sdiy] Telharmonium motors, perhaps?
> 
> 
> > On Montag, 22. November 2004 17:29, john mahoney wrote:
> > >     "Precision 12VDC Motor" with "Sinusoidal Encoder Output."
> > >
> http://www.goldmine-elec-products.com/prodinfo.asp?number=G14783
> > > The motors are small (cool!) and on sale for a mere 99 cents each
> > > (from $2.49).
> >
> > Any information on what exactly is meant by "sinusoidal encoder
> output"?
> >
> >
> > Achim.
> > --
> > +<[Q+ Matrix-12 WAVE#46 Neuron microQkb Andromeda XTk sonic
> heaven]>+
> >
> > DIY Stuff:
> > http://Stromeko.Synth.net/#DIY
> >
> 
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