 | | moving in a straight line with two motors?
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Hi, One of the first things I ran into when making a mobile 'bot using one motor for each of two drive wheels was the mismatch in their speed. Needless to say, it's a nice way to make curved path. Not what I want. So I've got one of those nifty (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Re: moving in a straight line with two motors?
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Tim, Instead of using the differential for angle sensors, why not use it to allow a single motor to drive both wheels? Then a single angle sensor coupled with a motor could drive the steering mechanism. This setup would be very similar to a radio (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | 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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| | Re: moving in a straight line with two motors?
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(...) The problem with this is that you now have a car-style turning radius (determined by front wheel deflection and traction) instead of a tank-style turning radius (essentially zero). Daniel "Dan'l" Miller Senior, School of Aeronautics and (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Re: moving in a straight line with two motors?
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-- ===...=== Don Forth ( Klaatu ) email: dforth@caro.net Home Page: (URL) Brandwine wrote in message ... (...) Check out - (URL) has an example of a treaded vehicle that uses this type of system one motor for forward and backward motion and one for (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: moving in a straight line with two motors?
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Tim, I used a quick and dirty technique to create steering maps for a robotic car when I was an undergrad at RPI and it sounds like you've got all the ingredients you'd need to do the same thing. Essentially you need to tow a trailer behind your (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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