Stepper Controller

Jonathan AllisonJonathan Allison Posts: 96
edited 2005-01-22 - 00:05:43 in Robotics
Hi

I've been looking at some stepper motor controller circuit websites and from what I can see, making a controller seems to be quite straight forward. Has anyone here ever attempted that with a sucessful outcome?


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Johnny

Comments

  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-01-21 - 14:34:18
    Direct control of a uni-polar stepper is not difficult -- whether you do it directly or through a controller is a matter of what functionality you require. We sell a stepper motor for experimenters and the documentation shows how to control it from a BASIC Stamp using a ULN2003 (Darlington array) to drive the coils.

    http://www.parallax.com/detail.asp?product_id=27964

    Bi-polar motors require the ability to change polarity -- you could do this with a chip like the L293D.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas, TX· USA
  • Jonathan AllisonJonathan Allison Posts: 96
    edited 2005-01-21 - 17:11:06
    Does uni-polar or bi-polar have anything to do with the motor being able to run in reverse?



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    Johnny


    Gee Sarah, Thats a reeeaaally nice gradin' present.
    I can't wait until Rickey sees that c***sucker!
    - Bubbles
  • kelvin jameskelvin james Posts: 531
    edited 2005-01-21 - 19:15:11
    There is some good info on steppers at this link, gets a little techie, but should answer most of your questions.
    kelvin
    www.cs.uiowa.edu/~jones/step/
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-01-22 - 00:05:43
    No, uni-polar and bi-polar motors can be commanded to move in either direction.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas, TX· USA
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