Subject:
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Re: moving in a straight line with two motors?
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 14 Nov 1998 18:48:37 GMT
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Viewed:
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2105 times
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--
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Don Forth ( Klaatu )
email: dforth@caro.net
Home Page: http://www.caro.net/~donfor
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Eric Brandwine wrote in message ...
> > > > > > "jsk" == John Scott Kjellman <jkjellman@ameritech.net> writes:
> At one point, in the distant past, I saw plans for a gear box that
> used either 2 or 3 differentials, I do not remember which.
>
> 2 motors were used, 1 to drive both axles, one for steering.
>
> axle1 == motor1 + motor2
> axle2 == motor1 - motor2
>
> With motor2 off, 1 on, the vehicle (most likely treaded), will track
> straight, in forward or reverse. With motor1 off, 2 on, the vehicle
> will spin in place. Combinations of the 2 will do the obvious.
>
> In order to regain the power of having 2 drive motors, you can run 2
> motors off one output port, and couple the shafts together. Of
> course, that brings the total motor count to 3, rather than 2, but it
> still only occupies 2 of the motor outputs.
Check out - http://www.minimal.com/ralph/camcart.html
He has an example of a treaded vehicle that uses this type of system
one motor for forward and backward motion and one for tunring - with a
tank like motion - I have build a small test bot using this and Leo's
page and it works very well - allthough a little slow with the 1:27 gear
ratio
...
--
=====================================
Don Forth ( Klaatu )
email: dforth@caro.net
Home Page: http://www.caro.net/~donfor
=====================================
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Message is in Reply To:
 | | Re: moving in a straight line with two motors?
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| (...) At one point, in the distant past, I saw plans for a gear box that used either 2 or 3 differentials, I do not remember which. 2 motors were used, 1 to drive both axles, one for steering. axle1 == motor1 + motor2 axle2 == motor1 - motor2 With (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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