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low cost high resolution shaft encoder

Discussion in 'Microcontrollers, Programming and IoT' started by google, Feb 28, 2010.

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  1. google


    Feb 28, 2010
    I am looking for a low cost high resolution shaft encoder to use in the feedback circuit of a closed loop stepper motor control circuit....all the ones i found range from hundreds to thousands of $$

    any help is appreciated.... thank you in advance !
  2. 55pilot


    Feb 23, 2010
    Low cost, high performance...... Usually that falls somewhere in between "very hard to find" and "does not exist"

    If you need the performance (as opposed to just wanting it), it is cheaper to spend the money and buy the right part. If you hack something together by gearing up a low resolution encoder or buying something cheap with made up specs (there are lots of those for everything), you will likely end up spending a lot more in time and eventual $$$ outlay.

    One strategy that MIGHT work is to identify a device that uses an encoder you want and try and buy a failed unit for parts only, possibly from eBay and hope the encoder is there and working.

    Good luck.

  3. coffeecuppepsi


    Apr 4, 2010
    what do you mean by "high resolution" ? if it's a stepper motor, then there's a limited number of steps anyway (unless geared down) but even so you could cont the steps and internaly calculate the actual position of the shaft based on the gearing used...
  4. ElectronWorks


    Aug 20, 2009
    Austria Microsystems do a good one. Measures to 4096 steps per revolution. AS5045
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