Re: G320s, New and Improved!

Jon,

Good afternoon! The only way illegal transitions can occur are if (1)
the channel A and B lines are shorted together or (2) a non-
quadrature encoder is used such as using the least 2 bits of an
absolute encoder. In either case the error will be caught due to the
ensuing consequences.

You are a very talented and skilled person with an educational
backgroud necessary to design and build a "no holds barred" servo
drive; I too have done that as well. It is on this point I would like
to expand the reply to a more general philosophical perspective.

My first point is experience has shown the last 10% of performance
consumes 90% of the final cost. My second point is a cost-beneft
ratio exists for almost anything one undertakes.

The second point implies the existance of a "sweet point" or value
where performance divided by cost is at a maximum. It takes effort to
find this optimal mix and it is the cause of satisfaction if one
comes close.

Compared to the G320, clearly your servodrive has more features, not
the least of which is tacho feedback. However it would cost between
$500 to $1,000 to the end user when all is said and done. Witness the
price of any mainline industrial servodrive.

There are Volkswagens and there are Ferraris and both are cars. Both
will get you from here to there and both beat walking. My design
efforts have focused on the utilitarian end. Your design is a high
end one and obviously works. With that said I would warmly encourage
you to produce it for sale, there is room for both. It would place me
on a more even footing as well since then I would be able to offer
helpful suggestions on how to improve it:)

Mariss

--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:
.
>
> Ah ha! Yes, it seemed like you might have had this problem in some
> installations. I not only have plain filtering, I also refuse to
accept
> any illegal transitions, ie. from 11 to 00 (from 11 to either 01 or
10 is
> legal) and just wait until a legal one shows up.
>
> Jon