Re: [Emc-users] 3-phase pwmgens for 7i39

[andy p. <bod...@gm...>]

On 30 September 2011 19:41, Viesturs Lācis <vie...@gm...> wrote:

> Is there any chance that I have to set something that is not 8? That
> Keling's spreadsheet says that motor has 8 poles.

With the motor in 0 mode and frequency 0 with low current you should
be able to turn the motor by hand and feel the poles.
(Actually, the docs say to use "n" not "0" for dumb-mode., so cfg=n,n,n)
4 notches = 8 poles.
>
>> Also, there is a 50% chance that the bldc.N.scale needs to be a
>> negative number.
>
> Does not work with or without "-" sign in front of the scale value.

It could still be the wrong Hall pattern then. You say that 4 of them worked?
It uses which transition it is to infer the angle, if the transition
sequence isn't quite right, then it won't work.

You could try qhi, it is probable that the encoder index is at motor zero.

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"