Results 1 to 2 of 2

Thread: motor backdrive

  1. #1
    Newbie
    Join Date
    May 2008
    Posts
    2

    motor backdrive

    I am building a motor controller that drives a motor then briefly drives it in the reverse direction for a fraction of a degree once power is deactivated (if turning clockwise CW a counterclockwise CCW pulse is required, if turning CCW, a CW pulse is required).

    Is anyone able to assist with a circuit that enables this? As I said, the reverse rotation is very brief, perhaps a 555 timer based solution. The problem I have at the moment is being able to "remember" the polarity of the initial rotation so that the timer is able to correctly send the motor in teh reverse direction.

    Cheers

  2. #2
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,053
    If you use a stepper motor it is much more precise.

    My opinion is to use a cheap PIC.

    if you want to do it all logic chip based, then to remember polarity use a latch (ff).
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •