Pan / Tilt camera using 2 servos(or steppers)+ BS2-IC (help)+ ?

Archiver

Thanks Dave:

Yes, steppers could be better.
I understand the feedback , but
any idea about how can I record and
play movements later. ?

Many thanks : Joe

--- Dave Mucha <davemucha@j...> wrote:
> I see two options pretty quickly.
>
> use some feedback such as a potentiometer or encoder
> to record
> movement.
>
> use a stepper as the motor.
>
> I think the stepper might be easier as you would
> need an H-bridge for
> the fwd and rev movements and the stepper would need
> a dual H-bridge
> for each motor. and Allegro has stepper chips for
> small steppers.
>
> Remember, a stepper SHOULD be driven at between 5
> and 20 times
> nameplave voltage, but no more than nameplate
> current. and if you
> take a uni-polar and drive it in bi-polar, full
> winding mode, you
> only need half the current to get the same power
> output.
>
> If you salvage some mini-steppers from an old
> printer, you may be
> able to use a darlington. a UNL2803 (8 circuits)
> could handle one
> (low power) motor and it has clamping doides to
> eleminate the high
> voltage spike that is created on every step as the
> magnetic files
> colapses.
>
> Dave
>
>
>
>
> --- In basicstamps@y..., Joe Terk <joeterk@y...>
> wrote:
> > Help:
> >
> > We need to move a camera and record
> > the pan & tilt moves, because we
> > need to repeat the same movements.
> >
> >
> > Servos, must be modified ?
> >
> > Pan / Tilt must be without vibrations.
> > Any Idea.
> >
> > Thanks : JOE
> > PS: Is it better the SSC
> > PS2: Is it possible to use VB to move servos
> > , speed, time , and recording this using BS2-ic?
> > or SSController is better.
> >
> >
> > __________________________________________________
> > Do you Yahoo!?
> > Faith Hill - Exclusive Performances, Videos & More
> > http://faith.yahoo.com
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and Body of the message will be
> ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>


__________________________________________________
Do you Yahoo!?
Yahoo! Web Hosting - Let the expert host your site
http://webhosting.yahoo.com

Archiver

At 07:05 AM 11/20/02 -0800, you wrote:
>Thanks Dave:
>
>Yes, steppers could be better.
>I understand the feedback , but
>any idea about how can I record and
>play movements later. ?
>
>Many thanks : Joe
Joe -

You might want to search for animatronics devices. Here are some, including a
recorder and playback mechanism for r/c servos:
http://www.wizard-devices.com/animatronics.shtml

I'm sure there are many other available.

Regards,

Bruce Bates