Subject:
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Re: More powerful motor (was: stuff)
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 15 Oct 1999 16:21:41 GMT
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Original-From:
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Robert Ashford <rashfor@apc.[antispam]net>
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Viewed:
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596 times
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You need to be careful if you use more powerfull motors with lego construction.
The plastic parts are very strong but you can easyly break teeth off of the
gears or twist the rods with the current motors and a little bit of gearing.
On the other hand if you are going to build something out of other materials,
you need to realize that the signal comming out of the RCX motor port is PWM
(pulse width modulated) the speed of the motor is controled by the frequency of
pulses sent to the motor. It may be possible to amplify the signal.
Anyone know how to amplify a signal that can be positive or negative. Maybe an
H-Bridge would work. Any suggestions?
Robert Ashford
----- Original Message -----
From: Joel Shafer
To: lego-robotics@crynwr.com
Sent: October 15, 1999 7:49 AM
Subject: More powerful motor (was: stuff)
Maybe the RCX could be rigged up to control a speed controller from an RC car.
At 05:51 PM 10/15/99 +1000, you wrote:
Hi everybody...
I was wondering if anybody has investigated attaching more powerful motors
to the RCX.
Can anybody tell me (before I bother finding out myself) how to rig up a
more powerful motor by getting the RCX output to control some sort of amplifier
that controls a bigger motor?
Also, just as side note, does anybody know what kind of plastic they use to
make lego? And is it safe?
thanx to you all - when I found this mailing list, I was releived to find
that I wasn't the only adult buying, and getting really into lego.
Tony
Joel Shafer joel@connect.net
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Message has 1 Reply:
 | | Re: More powerful motor (was: stuff)
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| (...) On Sat 16 Oct, Stephen Unwin (Me) wrote: (...) also there is short-circuit braking which will also come into play during PWM pulses (...) Forget that! (it does work but it can be simplified). Assuming a separate supply again for a more (...) (25 years ago, 28-Oct-99, to lugnet.robotics)
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