Subject:
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Re: Expected battery life
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 12 Jan 2000 15:56:43 GMT
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Original-From:
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alex wetmore <alex@STOPSPAMphred.org>
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Viewed:
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596 times
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From: "Jeff Canar" <j_canar@yahoo.com>
> > Also, in building a simple two wheel and castor bot as per the • instructions,
> > the robot does not travel in a straight line as the instructions say it
> > will. Is it possible that I have a bad motor?
>
> maybe, but probably not. i found the same problem. Again, Baum's book
> (somewhere) mentions that there are going to be individual differences • between
> motors, such that some turn more easily than others. So on a two motor
> bot that uses each motor to control a wheel, even if both motors are • programmed
> to go forward, it will drift.
Information on a mechanical solution to this problem can be found at
http://www.phred.org/~alex/lego. It uses two differentials to build a
mechanical adder/subtractor.
That said, it often isn't too big of an issue. For instance if you are
building a line follower robot it doesn't matter too much if it pulls to the
right. It will loose the line and then turn left and find it again.
alex
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Message is in Reply To:
 | | Re: Expected battery life
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| (...) have you tried upping the output power on the motor by 1 on the turn (...) i don't think long. The Baum book highly recommends getting rechargeables. (...) maybe, but probably not. i found the same problem. Again, Baum's book (somewhere) (...) (25 years ago, 12-Jan-00, to lugnet.robotics)
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