Quote:
Originally Posted by DampRobot
Could you explain to someone ignorant why controlling with voltage is so much better than PID? I would think that you want constant rpms on the shooter wheels for maximum consistency. More success with a less sophisticated control system seems a little counter-intuitive to me...
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PID is a good solution but it is not magic. The software is only one part of the servo system. In this case one can tune the wheel to free rotate at a selected speed but not have enough gain to recover quickly when a ball slows it down. So one might try to raise the gain. But then the higher gain might create an under-damped or oscillating condition when there is no load.
One approach is too build mechanical gain into the system by using stronger motors or storing energy in a flywheel etc. This gain would have much less phase delay and be more stable (I hope).
HTH