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DC motor reversing

Discussion in 'Electronic Basics' started by Code 918V, Jan 7, 2004.

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  1. Code 918V

    Code 918V Guest

    I have a small project im working on and what I need to make is a
    motor that will go down the track witch I already have but what I
    don't know how to do yet is I want the motor to stop at one end then
    continuously go back and forth.
    What would be good also is if I could change the motor speed also.

    if you have a min to help drop me a msg
  2. Ross Mac

    Ross Mac Guest

    The motor speed should be easy...look at the motor controls here there are many other places to find them too if
    you do a google search. Are you going to use a PLC on this project? If so, a
    proximity or beam sensor on each end of the track and a little software will
    control everything nicely. Good luck on your project....Ross
  3. Baphomet

    Baphomet Guest

    I did this several years ago to make an h.o. trolly car reverse. I put an
    insulated pin on each end of the hot rail. When the trolly wheel rode over
    it, it made contact which was detected, conditioned, and triggered the
    electronic reversing circuit to switch the rail polarity, making the trolly
    go in the reverse direction. I can post the schematic on
    alt.binaries.schematics.electronic if you would like (assuming of course, I
    can still find it).

  4. You can do it with a 2-pole changeover relay as I've shown here:

    I used that on a couple of projects, such as an automatic curtain
    operator, and a window-operator. That latter let me open the window
    when I turned the light out after reading for a while with it closed
    against moths/bugs. It occasionally had a problem with strong winds,
    but gave me years of useful performance.

    I've also attached a small supply of punctuation marks below, as I can
    see you are running low.
    ....... ...... ...... ......
    ....... ...... ...... ......
    ,,,,,, ,,,,,, ,,,,,, ,,,,,,
    '''''' '''''' '''''' ''''''
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