On 10 June 2013 13:44, Florian Rist <fr...@fs.tum.de> wrote:

> I began to set things up by looking up the pattern (3 in my case)

I have never had much luck picking the pattern with science.
However, if it ran smoothly and symmetrically in both directions in
"h" mode then it seems like that probably is the right pattern.

> the PWM signal for phase A is no longer a sinus
> wave as it used to be, but looks almost rectangular:

>  +------+             +-------+             +-------+
>  |      |             |       |             |       |
> -+      +--+       +--+       +--+       +--+       +--+      +--
>            |       |             |       |             |      |
>            +-------+             +-------+             +------+

That is what trapezoidal commutation looks like. Is the motor still in
"qh" mode?
What are the in_type and out_type parameters showing? You can compare
the values to the state-machine in the source code and see what stage
the component is sticking at.

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

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