re:Re: Black box

Hi,

Things are moving very rapidly. I will have an axis card layout this
evening. There is no servoing involved. Rather the very crux of this
approach is the concept of integrating position from velocity. It
works, I have sold hundreds of units based on this concept.

This allows the PC to calculate a series of velocity commands that
are deterministic and can be output at leisure.

Using this approach, a circle would consist of 1,024 vectors a
second. If your circle had a circumfrence of 1" (0.159" radius) and
if you were to move at 1" per second, it would be a 1,024 sided
polygon. If the circumfrence were 10" and you were to be moving .1"
per second, then it would be a 102,400 sided polygon and so on.

Mariss

> I'm glad you asked this! I have also wondered if the 'dumb box'

idea

> was really worth it! From Mariss' response, it appears we

are 'servo-

> ing', whether it's a stepper or not. That is, current position
> is 'derived' rather than implicitly commanded. He didn't give a 2
> axis answer. I think that means the same calcs are done for each

axis

> and all the bytes go out at the same time? Still haven't seen where
> the direction bit(s) come in?
>
> And I'm still waiting for an answer to my earlier post asking if a
> circle will consist of 1024 'rate changes' per second?...
>
> Hope this helps.
>
> Ballendo

...