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May 27, 2013, 07:45 PM
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Cogging


Brushless gimbal + defished gopro (14 min 58 sec)


It was pretty bad at normal speed.

Jerky motion (5 min 3 sec)


Testing with the narrowest field of view, the motor cogging was revealed, manely in the yaw axis, but probably in all 3 axes. No amount of power or PWM precision could overcome it. 8khz, 32khz, shifting the magnets away from the stator didn't matter. If you don't get a bog standard gimbal for $100, you'll end up paying more to find ideal motors.

The controller is about as good as it can get, without downward shooting capability. 10 bit PWM, 1024 step sin table added a tiny bit of precision.


At least the Gopro can put out some decent defished output.
Last edited by Jack Crossfire; May 27, 2013 at 07:56 PM.
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