Re: [CAD_CAM_EDM_DRO] Re: Help understanding servo motor

BY GEORGE I THINK YOU'VE GOT IT!!!!
I've not sketched out the full schematic yet, but.... assuming it is an LM393, then there are two caps, each across the inverting/noninverting inputs, pulldown on the outputs before going back to the connector.. all makes sense (mostly).. I think I'm about ready for a smoke test

THANKS!

- jim

On Tue, 28 Nov 2006 14:27:47 -0700
"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
> > >
> > >
> > >
> > > Jim:
> > >
> > > If the clear disk that is attached to the shaft has marks or "slots" on
> it
> > > then the "gizmo" is almost certainly an encoder. Most likely it is a
> > > quadrature incremental encoder.
> > >
> > >
> > > Randy Abernathy
> > > 4626 Old Stilesboro Road NW
> > > Acworth, GA 30101-4066
> > > E-mail: cnc002@...
> > >
> > > I furnish technical support, repair, and other related services for
> your
> > > industrial woodworking machinery. My background as Senior Service
> Engineer for
> > > the SCMI Group for nearly fifteen years with factory training, combines
> with
> > > my extensive background in electronics, mechanics, pneumatics,
> electrical and
> > > CNC machinery to offer you needed support for your machinery. Services
> > > include but are not limited to the following:
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > > Addresses:
> > > FAQ: http://www.ktmarketing.com/faq.html
> > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> > >
> > > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
> timg@...
> > > Moderator: pentam@... indigo_red@... davemucha@...
> [Moderators]
> > > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > >
> > > OFF Topic POSTS: General Machining
> > > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble.
> > > http://www.metalworking.com/news_servers.html
> > >
> > > http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
> > >
> > > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > > bill
> > > List Mom
> > > List Owner
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
> timg@...
> > Moderator: pentam@... indigo_red@... davemucha@...
> [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
> Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>
>