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Hard Drive Stepper Motor as Rotary Encoder
posted September 20 2013 12:43.15 by spic0m




This project shows how to use an old hard drive motor as a rotary encoder, i.e. to detect when the motor is turned by hand, by how much and in which direction. The principle is that turning the motor generate small currents in the coils of the motor. These small currents are amplified and fed in a micro controller to determine in which direction and by how much the motor turns.



[Link: ffleurey]
 
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  • At 20 September 2013, 20:13:22 user Giorgos Lazaridis wrote:   [reply @ Giorgos Lazaridis]
    • @alberth Let me agree with alberth... Seems like a 3-steps per cycle motor, but its just a 3-phase BLDC, BEMF driven.
      And let me agree with alberth once more, very nice application.


  • At 20 September 2013, 19:58:33 user alberth wrote:   [reply @ alberth]
    • That's not a stepper motor, but a 3-phase wye-wound permanent magnet brushless DC motor. But a nice application.


  • At 20 September 2013, 17:40:56 user Cheerio wrote:   [reply @ Cheerio]
    • brilliant












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