Subject:
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Re: lego Technic "class" ( About Motors )
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Newsgroups:
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lugnet.edu, lugnet.technic
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Date:
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Fri, 29 Oct 1999 15:33:00 GMT
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Reply-To:
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{tking@together.}NoMoreSpam{net}
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Viewed:
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184 times
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Todd, the stuff with the motors is Very interesting. A
friend has two small motors/generators with cranks that he bought at
some expensive educational materials store for about $25
I think. They run small pilot lamps well, and can do the
generator-motor thing. The fact that the Lego motors will
work this way opens a whole area of electrical experiment
and intuitive hands-on learning in the electrical area.
Do you know of any offline contacts at Lego that would be able
to give us any more technical information on the motors? Anyone
know who the original motor vendor is?? (Before the gears/case etc).
I will do some electrical tests on the Lego motors, and post the
results. I have one motor that failed early (high drag: acts like
it is internally shorted, or one armature winding is). So I will
dissect it. Anyone seen info on any other dissections?? The tests
will answer that question: How long / thick a wire can you use
between two motors before you lose (?? %) of the power?
I am aiming at some tutorial material on electricity, based on
the Lego motors, and probably some added widely-available lamps,
LEDs, resistors, etc.
Come to think of it, an RcX Output with an added inductor and capacitor
would become a variable DC power supply... Hmmm. I have to go look at the
motor driver data sheet again..
On steering: the motors will not 'track exactly', especially at low
rpms. I think you'd HAVE to gear the steering mechanism on the robot
down, but then it should work pretty well!
--
Regards,
Terry King ...In The Woods In Vermont
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