Shop OBEX P1 Docs P2 Docs Learn Events
Encoder wheel? — Parallax Forums

Encoder wheel?

ArchiverArchiver Posts: 46,084
edited 2003-09-27 18:40 in General Discussion
I'm not sure this is the correct name but I'd like to find one of
the wheels with hundreds of tiny holes around the edge and an
optical sensor that counts the holes go by.

I have seen these in inkjet printers.

What are they called and where can I get one with the sensor?

Thanks

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 04:45
    Got any junked mice laying around?

    - Robert

    (No I don't mean rodents with various chemical addictions - keep focused,
    people!)

    Original Message
    From: "ch2surf" <sachacrompton@v...>
    To: <basicstamps@yahoogroups.com>
    Sent: Thursday, September 25, 2003 9:42 PM
    Subject: [noparse][[/noparse]basicstamps] Encoder wheel?


    > I'm not sure this is the correct name but I'd like to find one of
    > the wheels with hundreds of tiny holes around the edge and an
    > optical sensor that counts the holes go by.
    >
    > I have seen these in inkjet printers.
    >
    > What are they called and where can I get one with the sensor?
    >
    > Thanks
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 13:52
    --- In basicstamps@yahoogroups.com, "ch2surf" <sachacrompton@v...>
    wrote:
    > I'm not sure this is the correct name but I'd like to find one of
    > the wheels with hundreds of tiny holes around the edge and an
    > optical sensor that counts the holes go by.
    >
    > I have seen these in inkjet printers.
    >
    > What are they called and where can I get one with the sensor?
    >
    > Thanks


    There are lots of variations of the wheel.

    one is a clear plastic sheet with laser printing black areas. you
    may get more holes per revolution that way.

    another method is to use 2 wheels, or one wheel with 2 prints so that
    you can tell which way you are moving.

    And there even multiple printings for higher resoluiton.

    And expired mouse is the easiest place to start.

    Dave
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 14:43
    Check out this site: (
    http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.htm
    l )
    Original Message
    From: ch2surf [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Bkfoz0xF67VMEZe8pjey2RwA1PbnEGCkpD4NnJayjvMIzn9Q0yTct28BSKFtcaTfLod_UwL70vwllnm7p7aMCc0]sachacrompton@v...[/url
    Sent: Thursday, September 25, 2003 10:42 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Encoder wheel?


    I'm not sure this is the correct name but I'd like to find one of
    the wheels with hundreds of tiny holes around the edge and an
    optical sensor that counts the holes go by.

    I have seen these in inkjet printers.

    What are they called and where can I get one with the sensor?

    Thanks


    To UNSUBSCRIBE, just send mail to:
    basicstamps-unsubscribe@yahoogroups.com
    from the same email address that you subscribed. Text in the Subject
    and Body of the message will be ignored.


    Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 21:29
    The link doesn't work. Can you please correct it?

    Thanks

    --- In basicstamps@yahoogroups.com, "Bryan Smith" <bsmith@w...>
    wrote:
    > Check out this site: (
    >
    http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.
    htm
    > l )
    >
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 22:36
    Just add "HTML"

    http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.htm
    l
    Original Message
    From: ch2surf [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=q-b5sMNqh4M9rNaYY944kkyqez7Qo-owpSA3ZV7jAk75iVrivCPw7HSu_u8QWcjT5AY1QZ0FDrtRVENctcO_kQ]sachacrompton@v...[/url
    Sent: Friday, September 26, 2003 3:29 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Re: Encoder wheel?


    The link doesn't work. Can you please correct it?

    Thanks

    --- In basicstamps@yahoogroups.com, "Bryan Smith" <bsmith@w...>
    wrote:
    > Check out this site: (
    >
    http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.
    htm
    > l )
    >



    To UNSUBSCRIBE, just send mail to:
    basicstamps-unsubscribe@yahoogroups.com
    from the same email address that you subscribed. Text in the Subject
    and Body of the message will be ignored.


    Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-26 23:36
    If you use a powerful optical coupler, those inkjet print may look
    like a clear plastic to it. It puszzled me when I started designing
    encoders. The real effective one use solid material with holes. A real
    good method is using a fiber glass PCB and etch your encoder on it.
    The process is the same as making a photo etch PCB. The etched portion
    would look transparent to the opto coupler.

    Cheers,

    - Johari Aziz

    --- In basicstamps@yahoogroups.com, "Dave Mucha" <davemucha@j...> wrote:
    > --- In basicstamps@yahoogroups.com, "ch2surf" <sachacrompton@v...>
    > wrote:
    > > I'm not sure this is the correct name but I'd like to find one of
    > > the wheels with hundreds of tiny holes around the edge and an
    > > optical sensor that counts the holes go by.
    > >
    > > I have seen these in inkjet printers.
    > >
    > > What are they called and where can I get one with the sensor?
    > >
    > > Thanks
    >
    >
    > There are lots of variations of the wheel.
    >
    > one is a clear plastic sheet with laser printing black areas. you
    > may get more holes per revolution that way.
    >
    > another method is to use 2 wheels, or one wheel with 2 prints so that
    > you can tell which way you are moving.
    >
    > And there even multiple printings for higher resoluiton.
    >
    > And expired mouse is the easiest place to start.
    >
    > Dave
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-27 02:18
    --- In basicstamps@yahoogroups.com, "ch2surf" <sachacrompton@v...>
    wrote:
    > The link doesn't work. Can you please correct it?
    >
    > Thanks
    >
    > --- In basicstamps@yahoogroups.com, "Bryan Smith" <bsmith@w...>
    > wrote:
    > > Check out this site: (
    > >
    >
    http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.
    > htm
    > > l )
    > >


    Worked for me.

    http://www.seattlerobotics.org/encoder/
    200010/dead_reckoning_article.html


    cut and paste, don't forget it ends in html
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-27 02:24
    You can get Encoders from <A
    HREF="www.automationdirect.com">www.automationdirect.com</A>

    They have glass wheels with from 100 to 2500 lines of resolution.

    Hope this helps.

    Alan Bradford
    Plasma Technologies


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-27 02:35
    If you are looking for some metal encoder wheels and matching quadrature
    sensors and can make your own mounts, I have a cheaper source for you.

    *************

    > You can get Encoders from <A
    HREF="www.automationdirect.com">www.automationdirect.com</A>
    >
    > They have glass wheels with from 100 to 2500 lines of resolution.
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-27 18:36
    On that note, I'm curious if there's any gray code to binary conversion
    functions built into stamp reading protocols. Or is this something you have
    to write into the BS app itself?

    Mike Sokol
    www.modernrecording.com
    mikes@m...


    " One should not increase, beyond what is necessary,
    the number of entities required to explain anything"...
    -William of Occam-
    Original Message
    From: "Dave Mucha" <davemucha@j...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, September 26, 2003 8:52 AM
    Subject: [noparse][[/noparse]basicstamps] Re: Encoder wheel?


    > --- In basicstamps@yahoogroups.com, "ch2surf" <sachacrompton@v...>
    > wrote:
    > > I'm not sure this is the correct name but I'd like to find one of
    > > the wheels with hundreds of tiny holes around the edge and an
    > > optical sensor that counts the holes go by.
    > >
    > > I have seen these in inkjet printers.
    > >
    > > What are they called and where can I get one with the sensor?
    > >
    > > Thanks
    >
    >
    > There are lots of variations of the wheel.
    >
    > one is a clear plastic sheet with laser printing black areas. you
    > may get more holes per revolution that way.
    >
    > another method is to use 2 wheels, or one wheel with 2 prints so that
    > you can tell which way you are moving.
    >
    > And there even multiple printings for higher resoluiton.
    >
    > And expired mouse is the easiest place to start.
    >
    > Dave
    >
    >
    >
    >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2003-09-27 18:40
    --- In basicstamps@yahoogroups.com, "Mike Sokol - ModernRecording"
    <mikes@m...> wrote:
    > On that note, I'm curious if there's any gray code to binary
    conversion
    > functions built into stamp reading protocols. Or is this something
    you have
    > to write into the BS app itself?


    Need multiple sensors and a wheel with multiple levels. the grey
    code is not that hard, but it does take some programming, We
    discussed it on the list about a year or so ago. IIRC, Check for a
    post from Tracy Allen (surprise, surprise).

    Dave
Sign In or Register to comment.