Subject:
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Re: Using the Motor as a Tachometer
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 9 Aug 1999 13:31:12 GMT
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Viewed:
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981 times
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In lugnet.robotics, Todd Lehman writes:
> On Wed, 17 Feb 1999, in lugnet.robotics, David Chen wrote:
> > [...]
> > I was reading about hooking up 2 motors A + B and arriving at a
> > dynometer arrangement. ie. Turning A causes B to rotate.
SNIP
> Dave, this use of a motor as an input is fascinating! (How safe is it?
> Looking at some older threads, there seems to be a difference of opinions,
> or at least a non-consensus that it's safe...)
SNIP
> --Todd
>
> p.s. A couple of related threads:
> http://www.lugnet.com/robotics/?n=3309&t=i&v=b (Jan 99)
> http://www.lugnet.com/robotics/?n=3371&t=i&v=b (Feb 99)
> http://www.lugnet.com/robotics/?n=5240&t=i&v=b (Jun 99)
> http://www.lugnet.com/robotics/?n=5254&t=i&v=b (Jun 99)
>
Todd,
The danger as I see it is not electrical but physical. If the sensor mode of
the input port is "active" the port will provide power to the motor (sensor).
Thus you could have 2 motors either working together or opposing. This could
be too mutch force for the model to handle...
Rich
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Message is in Reply To:
 | | Re: Using the Motor as a Tachometer
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| (...) Dave, this use of a motor as an input is fascinating! (How safe is it? Looking at some older threads, there seems to be a difference of opinions, or at least a non-consensus that it's safe...) I just hooked an 1x2 LEGO incandescent lamp up to (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
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