Concept Discussion: Vision Closed Loop or Encoder/Gyro PID based Closed Loop?

[Turing'sEgo]

Originally Posted by Andrew Schreiber

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With off the shelf webcams the fastest you're likely to get is 30 fps.
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I believe the ps eye can get 60 fps, but I agree. Unless you have a very large input image (we're talking like 1440p), then the sensor feedback will also be more precise too. So, the using a sensor will give you both more updates a second and have more accuracy, theoretically, that is a no brainer.

[Greg McKaskle]

Getting a camera to run any faster than 30fps takes special HW and pretty careful code. If 33ms is an OK loop rate for your mechanism, it is a valid sensor, otherwise you might want to augment with something faster -- and/or with less lag. In many situations, an ultrasonic, gyro, encoder, or pot makes a great compliment to the camera's higher-level control feedback.

It is great that you are asking for advice, but there are teams who will make both solutions work. My advice it to figure out how you can do a quick prototype or test.

Greg McKaskle