Subject:
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RE: 2 Motors -> 1 axle
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 8 Jan 2000 16:14:00 GMT
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Viewed:
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1927 times
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Tilman Sporkert wrote:
> If the two motors are supplied with similar electrical power, and there is
> any
> real work to be done, then the two motors will not "fight" each other.
> They will
> each contribute their part to get the work done.
<snip>
> As soon as you put a load onto the output, things
> will
> balance out. That's the beauty of electric motors. Can't do that easily with
> combustion engines.
OK, enough people have replied along these lines that I have to assume
it's true. And the more I think about it, and about how electric motors
work, the more I'm convinced it must be true, even with all the internal
gearing and the flywheels in the mini-motors.
(That's why I love mailing lists: you're practically guaranteed to learn
something new, or at the very least to get a new perspective on things.)
A redesign of the 2 motor drive is in the works...and boy will it be
simple: one motor driving each end of a short axle with a big wheel in
between them. I think I'll photograph the current "nifty" differential
drive for posterity, though. It sure was fun building it :-)
One other question, having more to do with the RCX than anything else:
does it make a difference whether I run both motors from one output or
use 1 output for each motor? My guess is there's no difference, that any
current limiting in the RCX is systemwide, but there may be individual
current limiting on each output, I don't know. Does anybody know for sure?
BTW, thanks to everyone for their replies on this. For a lego newbie like
myself, this group is an amazing resource.
Dave Johnson
Still unbalanced
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Message has 1 Reply:
 | | Re: 2 Motors -> 1 axle
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| I had 2 motors hooked up to 2 outputs for valves. The valves ran fine. When I combined the 2 wires on one input, the valves ran considerably slower, since the current was shared between 2 motors. I guess if you are running at speed four, and you (...) (27 years ago, 8-Jan-00, to lugnet.robotics)
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