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New Project!! Help anyone? — Parallax Forums

New Project!! Help anyone?

DejouxDejoux Posts: 2
edited 2010-06-04 03:30 in General Discussion
im working on a project that im using my very first Boe-Bot for. but the servos that came with the kit arent quite fast enough for my ideas. im thinking i should use a stepper motor but i have some questions.

my biggest question is would a 4-Phase / 12 Volt Unipolar Stepper Motor (http://www.parallax.com/Store/Accessories/MotorServos/tabid/163/CategoryID/57/List/0/SortField/0/catpageindex/1/Level/a/ProductID/65/Default.aspx) be compatible with my Board of Education Rev C 2000-2003 and the accompaning BASIC Stamp Editor v2.1?

any suggestions or tips would be greatly appreciated.

Comments

  • JasonDorieJasonDorie Posts: 1,930
    edited 2010-06-02 00:37
    "Compatible" is a strong term for it - It needs a means of switching the power through the coils, like the L293D quad half-H bridge driver:
    http://www.parallax.com/Store/Components/AllIntegratedCircuits/tabid/154/CategoryID/31/List/0/SortField/0/catpageindex/3/Level/a/ProductID/608/Default.aspx

    Using the stamp to control that will certainly move those steppers. (I've moved the same ones using a Propeller with that chip)

    Jason
  • DejouxDejoux Posts: 2
    edited 2010-06-02 10:06
    so your saying that i need to get that chip? and would i be able to put it on my Board of education and use BASIC Stamp to control it?

    my other concern is that i need 2 of them and they say they're 12v. my board is powered by 4 AA batteries.
  • Spiral_72Spiral_72 Posts: 791
    edited 2010-06-03 16:35
    Look up the Step Genie.... If I'm not mistaken it'll supply 1A directly...... maybe it was 500mA???. It's a small IC that you feed enable, direction, and step for controlling a stepper. It makes programming easy and they're pretty cheap, like $8 or something..... .they have their own website.


    Digikey and Mouser should also have drivers for the three wire control. Usually you have to build the H-bridge driver like mentioned though.

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    "puff"...... Smile, there went another one.
  • RavenkallenRavenkallen Posts: 1,057
    edited 2010-06-04 02:49
    I share your pain. I wish they would make a continuous rotation servo that was fast. I built my own robot and was kind of disappointed that the thing could only go like 3/4 of a foot in a second. It has really good torque, but a snail could beat it in a race....You might consider using common dc hobby motors. The interface to such a motor would be WAY easier.
  • FranklinFranklin Posts: 4,747
    edited 2010-06-04 03:30
    www.parallax.com/tabid/599/Default.aspx

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    - Stephen
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