Re: SV: [CAD_CAM_EDM_DRO] Re: breakout boards plus - hard choice

> Hi guys,
> Here's the message Mariss posted on his Yahoogroup on may 28 2007. I think
> it will provide answers to some of your questions.
>

> A month ago I came to the conclusion the approach I had been working on for
> two years wouldn't and frankly never could work. It was to tweak the step
> and direction inputs on an encoder feedback closed-loop step motor drive to
> get the performance the motor can have closed loop.
>
> This revelation suggested the key to the solution is to make the motor drive
> self-commutating. This is not in itself an unknown practice though it is a
> little obscure. It is obscure only because it in turn requires phase-lag
> compensation that no previous implementation has satisfactorily solved. I
> have come up with a simple closed-loop solution that is patentable and I
> have it running on the bench right now.

>
> The drive is unharnessed right now. I will be putting a harness on it to
> control its speed and position. The method is patentable as well. A cool
> feature of the method is with an encoder the drive is closed-loop with all
> the features described. Without an encoder it's just another really nice,
> ordinary Clark Kent kind of microstep motor drive.