Subject:
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Adder/Subtractor revisited
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 31 Jan 1999 17:18:17 GMT
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Original-From:
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Reno Pittner <renop@home.com^Spamless^>
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Viewed:
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990 times
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I'm a little confused again. The explanation of the
adder/subtractor was to allow one to power each wheel
while the differential compensated for the different motor
tolerances, allowing the bot to travel in a straight line.
Clear as a bell, until I built one. I chose the ones on
the Cyberia site as it was the most condensed versions. Both
designs (I think) use a single engine to control forward movement
while the other controls the steering. I believe Alex's father
design does the same. If this is the case, it seems to conflict
with the explanation above.
The motors are geared to the differential gear. Is this correct?
What happens if you power the axle gears?
Thanks,
Reno
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | Re: Adder/Subtractor revisited
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| Reno, no the purpose of the adder/subtractor is to supply power to two outputs based on the differential between two inputs. So if you have two inputs (A, B) and two outputs (X, Y), you get the following equations for rotational velocity (of course (...) (26 years ago, 31-Jan-99, to lugnet.robotics)
| | | Re: Adder/Subtractor revisited
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| (...) Nope. That's what one single differential does. Use two motors to power the two axles on the differential, then use the rotating differential body to drive your bot. Regards, Johannes. (26 years ago, 1-Feb-99, to lugnet.robotics)
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