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Subject: 
Re: Is it possible for a robot to count studs?
Newsgroups: 
lugnet.robotics
Date: 
Sat, 12 Nov 2005 09:50:29 GMT
Reply-To: 
Geoffrey Hyde <gDOThyde@bigpondDOTnetDOTau[spamcake]>
Viewed: 
1430 times
  
"Steve Lane yahoo.co.uk>" <stevenrobertlane@<nospamplease> wrote in message
news:IptF5D.vJD@lugnet.com...
In lugnet.robotics, Geoffrey Hyde wrote:

I've used gear racks for this purpose. 2.5 gear rack teeth = 1 stud.
Combine
with a gear and a rotation sensor and away you go.

Is there a way to do it without a rotation sensor?  I wasn't planning on a
LEGO order from S@H until after the New Year.

The other problem is the rotation sensor might need to move slowly across, I
don't know if this robot I'm building will traverse very fast across the
baseplate.  I've heard that they have problems at low speeds.


--
Cheers ...

Geoffrey Hyde



Message has 2 Replies:
  Re: Is it possible for a robot to count studs?
 
(...) If you are moving slow enough, one possibility is using black friction pegs on a technic beam, say, one every other hole, and a touch sensor that moves by them counting them. If timing isn't enough to get you 1 +/- 0.1 stud resolution between (...) (19 years ago, 12-Nov-05, to lugnet.robotics)
  Re: Is it possible for a robot to count studs?
 
(...) Yes. The rotation sensor does occasionaly mess up at low rotation speeds, but this issue can be overcome by gearing up the actual rotation to higher speeds, and then dividing it back down in software. Kev (19 years ago, 12-Nov-05, to lugnet.robotics)

Message is in Reply To:
  Re: Is it possible for a robot to count studs?
 
(...) I've used gear racks for this purpose. 2.5 gear rack teeth = 1 stud. Combine with a gear and a rotation sensor and away you go. (19 years ago, 12-Nov-05, to lugnet.robotics)

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