Subject:
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Re: Adder/Subtractor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 12 Jul 1999 03:30:26 GMT
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Original-From:
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alex wetmore <alex@phred[StopSpam].org>
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Viewed:
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744 times
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On Tue, 6 Jul 1999 bejones@hursley.ibm.com wrote:
> Dumb Newby Question 1: What is the advantage of the
> adder/subtractor (as per Leo's Lego) over driving two wheels/tracks
> independently and using speed variation to provide turning?
If you use two wheels then your robot will go in circles when you
tell it to go straight. This is because motor speeds are rarely
matched, so the left and right motor won't go the same speed at
the same power level.
The disadvantage of using the adder/subtractor is that it puts
more gears in between your motor and your wheels, so there is
some efficiency loss. Folks on here haven't had great luck
mixing adder/subtractor designs with tracks. I've had good
luck mixing them with wheels.
http://www.phred.org/~alex/lego contains information on a
bunch of different adder/subtractor designs.
alex
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | Adder/Subtractor
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| Hi, I'm a newby to both Mindstorms (just got my set 2 weeks ago) and Robotics. So.... Dumb Newby Question 1: What is the advantage of the adder/subtractor (as per Leo's Lego) over driving two wheels/tracks independently and using speed variation to (...) (25 years ago, 6-Jul-99, to lugnet.robotics)
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