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Thanks guys(Rainer and Gary) for your valuble ideas. i think i will go with the
Rainer's method because of the simpicity(only
one motor). any way i designed my sensor module for beacon finding long back
with three sensors. so now i got confidence
that it's going to work. i haven't tried this with HB yet. unfortunatly
yesterday night i fried my HB bymistake. my 12v 1amp
power touched the HB tracks and blowed something up. i sent a mail to this news
group and started working on debugg
procedure. i will let you know if i succeed in it. Thanks again guys. you are
very helpfull to me.
Raj
In lugnet.robotics.handyboard, Rainer Balzerowski writes:
> In lugnet.robotics.handyboard, Gary Livick writes:
> > It's just an ordinary motor after you modify it to take out the feedback • device,
> > and you have no idea of where it is pointing at any time. Maybe you could • have
> > the robot turn in a circle to find the beacon? Or use a small stepper motor? • You
> > can drive a bipolar stepper right off one of the L293D motor ports. If you • don't
> > like either of those ideas, how about mounting two servo motors, one on top • of the
> > other, with your sensors on top of the two. That way you can get nearly 360° • of
> > rotation.
> >
> > Good luck!
> >
> > Gary Livick
> >
> > raju kammela wrote:
> >
> > > Hi,
> > > I am trying to implement a auto recharge system for my robot. i am using • a
> > > homming beacon on the recharging station and whenever myrobot is out of • charge
> > > it has to find the that beacon. to scan the area i need to use the sero • motor.
> > > i never used a servo motor for continuous rotation. and i never opened one • to
> > > see the pot arrangement. so my question is if we modify the servo for • continous
> > > rotation is it still going work as a sero or then it's just a ordanary • motor.
> > > all i need is to get 360 deg of rotation for my scan. i am waiting for • this
> > > part of my design to complete. please help with this question.
> > >
> > > thanks in advance.
> > >
> > > raj
>
>
> Hi all,
>
> why so complicated ?
> Use a pair of gears to double the turn ability.
> We had the same problem (to find a beacon) and succesfully build it.
> I guess you don't have to be 1 degree accurate, or ?? I think 2 degrees will
> work. (You don't have time to look on every degree.)
> I have another good hint for you.
> Use three beacon sensors to find the beacon.
> The middle sharp focused the other two with a wider range to find it left or
> right.
> If you're interested take a look at our solution
> http://www.informatik.fh-hamburg.de/~lego/Projekte/bilder_roberta/roberta_hk_3 • .jpg
> (sorry this site is available in german only, but that doesn't matter for
> the photo I guess ;-) )
>
> Rainer
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Message is in Reply To:
 | | Re: hacking servo motors
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| (...) Hi all, why so complicated ? Use a pair of gears to double the turn ability. We had the same problem (to find a beacon) and succesfully build it. I guess you don't have to be 1 degree accurate, or ?? I think 2 degrees will work. (You don't (...) (23 years ago, 16-Jan-01, to lugnet.robotics.handyboard)
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