On 29 December 2012 18:02, Gene Heskett <ghesk...@wdtv.com> wrote:

> Obviously something deeper than the timing of the hall patterns is wrong
> there.

Indeed. Considering that a trapezoidally-commmutated motor is up to 30
degrees out on timing at any one time, it can't matter that much, and
small errors in where the bldc component thinks that the motor zero is
should not have this sort of effect.

I would be taking the PID out of the loop and seeing of the motor can
be persuaded to zero and run both directions with direct current
commands from HAL (maybe via a slider control to allow fast direction
changes. I have always found myself unable to type "setp
bldc.0.current 0" quite as fast I would like.


-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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