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In lugnet.org.ca.rtltoronto, Rob Antonishen wrote:
> Well-
>
> I finally got around to testing the idea of a R/C tank. I built a
> little test rig just to see how it would work.
>
> The idea is an adder/subtractor drive, with the R/C "drive" output
> goes to a motor on the base input and the steering output tied to a
> polarity switch. The polarity switch is connected back to a battery
> box, and the output is connected to a motor on the added/subtracted
> input.
>
> I used the R/C motors for both driving and steering, so it whips
> around pretty fast. It isn't pretty, but it gives me enough
> confidence to make a tracked base with the same drive, now.
>
> http://www.brickshelf.com/gallery/ffaat/RC-Tank-Test/img_1882.jpg
>
>
> A front view showing the polarity switch:
> http://www.brickshelf.com/gallery/ffaat/RC-Tank-Test/img_1883.jpg
>
> And a shot of the differential adder/subtractor drive, straight from
> Doug's page here (http://www.visi.com/~dc/adder/index.htm):
> http://www.brickshelf.com/gallery/ffaat/RC-Tank-Test/img_1884.jpg
>
> Also, I put up a video of it in action:
> http://www.youtube.com/watch?v=9PmweX1gc60
>
> -Rob A>
Nice! Can it steer while also moving forward, or does the switch work with just
a 3-position action (turn right/go straight/turn left)? Could you also use 3
12-tooth gears for the side opposite the 2 24-tooth gears, or did you use the 2
16-toothed and 1 8-toothed gear for a specific reason other than stud-length?
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Message has 1 Reply:
 | | Re: R/C skid steer test
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| (...) Oh yes! it can steer when going forward. With the current gearing though, it spins out. I should try to drive the adder/subtractor input with an 8-tooth gear rather than the current 24 to slow the turning rate down. Though I suppose I couldn't (...) (18 years ago, 7-Feb-07, to lugnet.org.ca.rtltoronto, lugnet.technic)
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Message is in Reply To:
| | R/C skid steer test
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| Well- I finally got around to testing the idea of a R/C tank. I built a little test rig just to see how it would work. The idea is an adder/subtractor drive, with the R/C "drive" output goes to a motor on the base input and the steering output tied (...) (18 years ago, 1-Feb-07, to lugnet.org.ca.rtltoronto, lugnet.technic)
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