Re: black box specs

Hi,

Ron, please take a look at:
http://www.egroups.com/files/CAD_CAM_EDM_DRO/CIRCUITS/Pulse+Gen/PulseG
enMB+3D.jpg

Mariss

--- In CAD_CAM_EDM_DRO@egroups.com, ron ginger <ronginger@r...> wrote:
> Is J.R. Kerr still on this list? He was here a while, and
described his
> PicServo-CMC.
>
> What I would really like is for him to separate the signal handling
> from the servo drive. Then I could take his serial interface and
drive a
> stepper motor with Dans board, or any other driver, or a Geko servo
> drive, or even buy a full PicServo if that fit a particular machine.
>
> Here is the box I want, with the big features spread out over
several
> version.
>
> 1) serial line, with the ability to network several devices as done
in
> Pic Servo. The 12 axis guys can just use 4 boards chained together.
>
> 2) output to be step and dir signals, on a screw terminal block, so
I
> can drive any stepper board or a Geko servo drive.
>
> The commands needed are:
>
> Some setup commands to set max rates, acceleration values, etc.
>
> Inquire command to get current location. I would call this from VB
about
> 1 per second to update the screen. Obviously this isn't 'real time'
but
> Im just going to update the pretty picture in the gui. Also this
> inquire cannot effect the step rates, so if the box is to busy
stepping
> the inquire can just wait,
>
> A panic stop (E-stop) command, maybe with one option to stop with
> deceleration another to just plain stop.
>
> In V1 I need to be able to send an X,Y,Z tuple, in steps (the pc can
> figure out the inch or mm to step conversion). I want the box to do
> something like Bresenhans move on all 3 axis. It will send back an
ACK
> when its done with the move.
>
> In V2 we could add circular interp.
>
> in V3 we could add the ability to fill a buffer with lots of short
> moves, and keep the drive moving.
>
> PicServo does all this right now. I could just buy 3 of them ($200
each)
> and build my machine. But I would be stuck with just the drive
capacity
> of Picservo.
>
> I know of at least 3 command sets that I would be happy with-
Picservo,
> SimpleStep or Indexer.LPT. Indexer might be an advantage because
someone
> wanting an all software solution could buy indexer, others could
buy the
> box.
>
> What are the copyright issues if we mimic someone's commands? the
> command set is published, is it OK for us to do our own
implementation
> of it?
>
> I have this working, to what I call the V1 level, on a Tiny Tiger
> microprocessor. I stopped working on it because I don't want to be
in
> the hardware business. Obviously this can be done on a PIC, since
> PicServo does it.
>
> ron ginger