Re: [CAD_CAM_EDM_DRO] Re: Help understanding servo motor

Seems unlikely if the logo is Mitsubishi. The link you mentioned for the
M393 8 Channel ADC M-module is a circuit board:

http://www.acq.nl/content/producten/product_sheet.asp?prodid=61

Don't be misled by the fact that the reference I showed you is from National
Semi. Lots of different companies make compatible products. LM393 is a very
common component. It is an 8-pin device. If you draw a diagram of how the
components are connected and post it in the photos section somebody might be
able to dope it out.
--
Phil Mattison
http://www.ohmikron.com/

----- Original Message -----
From: John Hansford <kz1927@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, November 28, 2006 2:54 PM
Subject: [CAD_CAM_EDM_DRO] Re: Help understanding servo motor


> Is it possible the logo is Motorola?
>
>
http://www.compactpci-systems.com/products/search/index.php?q=Systems%3A+Pro
grammable+automation+controller&op=cn&max=40
>
> An M393 8 Channel ADC M-module?
>
> John
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Phil Mattison"
> <mattison20@...> wrote:
> >
> > I suppose the M393 could be an LM393 dual comparator, which might be
> useful
> > in cleaning up the output from the optical sensors. If that is the
> case the
> > LM393 pinout should make it much easier to deduce the rest of the
> circuit.
> > It may be as simple as a couple of LEDs and a couple of sensors.
> >
> > http://www.national.com/pf/LM/LM393.html
> > --
> > Phil Mattison
> > http://www.ohmikron.com/
> >
> > ----- Original Message -----
> > From: James Washer <washer@...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Tuesday, November 28, 2006 1:45 PM
> > Subject: Re: [CAD_CAM_EDM_DRO] Re: Help understanding servo motor
> >
> >
> > > Thanks... that first link is nice.. I just wish I could find the
> docs for
> > that chip... google-ing didn't find anything.. I should be able to
> determine
> > power and ground by looking at the circuit board, etc.. but as to the
> > signal... it may be harder to figure out... could be drivers, could
> be OC,
> > etc. oh well, if I burn this one up, I can buy something else.
> > >
> > > - jim
> > >
> > > On Tue, 28 Nov 2006 12:50:33 EST
> > > cnc002@... wrote:
> > >
> > > >
> > > > In a message dated 11/28/2006 12:16:48 P.M. Eastern Standard Time,
> > > > mattison20@... writes:
> > > >
> > > > The gizmo is probably a quadrature encoder. See:
> > > >
> > > > http://www.sxlist.com/techref/io/sensor/pos/enc/quadrature.htm
> > > >
> > > > http://en.wikipedia.org/wiki/Rotary_encoder
> > > >
> > > > To figure the pinout you first need an idea how it works.
> > > > --
> > > > Phil Mattison
> > > > http://www.ohmikron.com/
> > > >
> > > > ----- Original Message -----
> > > > From: James Washer <washer@...>
> > > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > > Sent: Monday, November 27, 2006 10:56 PM
> > > > Subject: [CAD_CAM_EDM_DRO] Help understanding servo motor
> > > >
> > > >
> > > > > I have a couple of small servo motor pulls from a big
> plotter. On one
> > end
> > > > of the motor is a "gizmo" that has a few electronic components
> (mostly
> > > > resisters, an LED, and clear plastic disk attached to the motor
> shaft,
> > a
> > > > couple of pots, and an 8pin chip marked with the Mitsubishi
> logo and
> > the
> > > > designation M393)
> > > > >
> > > > > So.. I'm guessing this is the rotational positional counter gizmo
> > (forgive
> > > > me for not knowing the correct terms).
> > > > >
> > > > > Anyway, can I use this? any tricks to figure out the pinout
> (looks
> > like
> > > > about 5 pins of a 10 pin ribbon cable are connected)
> > > > >
> > > > > - jim
> > > >
> > >