Re: [CAD_CAM_EDM_DRO] DC Brushless Motors and Drives

Jon Elson wrote:

>
> encoder provides the right signals for the motor's commutation. Most
> modern servo amps figure
> out the commutation by counting out encoder ticks from the index, but
> then they need to
> know how many poles the motor is and how many lines the encoder has.

Hi Jon,

just another dump question to you as expert: Do they need absolute
encoders for this to work? If not, how do they handle the commutation
before the first index impulse is encountered?

Thanks

Bene

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