Motor / gearbox Design for 100 lb AGV



Yes, the treads are cosmetic. they dont move. Some weight of course but otherwise not a factor. Think the losses in the gear box, and the relatively light weight design of the gearbox is the primary problem right now.
Question: Does the tank get to a usable speed with the parts you are using right now? Or does it strip the gears and stop moving? What is the turning radius with the parts you are using right now?
And btw: the book wikinomics is an excellent read about design collaboration like this group is doing...in your copious spare time, consider reading
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When I've seen t-shirts shot into the crowd at a sporting event, the guys doing the work tend to run at a good speed from area to area on the field to try to get to different parts of the crowd and not take up too much time during the game delay. So my guess is that getting the tank out on the court, and moving it from one end of the court to another, is something they can't wait 2 minutes while the tank slowly crawls along at a walking speed. What seems like I good clip when you are standing next to the tank will probably look like it's standing still from from up in the stands in a big arena. If it's that slow, they may have to carry it out, and carry it off the court, instead of letting it drive itself.
Also, with no turret, it can't drive along a side line and shoot into the crowd at the same time, so they have to stop and turn it, shoot a few times in different directions, and then turn and drive it down the court, stop and turn, shoot a few more times etc. All that will waste even more time and bore the fans if the tank isn't able to haul butt. If it had a turret which they could aim and shoot independent of the motion, that would allow them to get away with slower motion because it could be shooting as it moved down the field.
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Curt Welch http://CurtWelch.Com /
snipped-for-privacy@kcwc.com http://NewsReader.Com /
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On Apr 22, 11:37 am, snipped-for-privacy@kcwc.com (Curt Welch) wrote:

you are right, all valid points...speed and maneuverability both important...still i think less demanding than a combat bot but you're right....
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mark wrote:

>>

Just aim the gun sideways, rather than ahead. This limits you in that you have to circle the court in a direction that points the gun outward, but it's simple. And you can fire on the move.
                    John Nagle
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On Sun, 20 Apr 2008 16:12:36 -0700 (PDT), mark

You might want to get a large heavy duty electric riding toy like some below and modify it to be your moble remote controlled platform. Probably much cheaper, quicker, and less trouble than building one from scratch.
http://www.walmart.com/catalog/product.do?product_idI38647
http://www.walmart.com/search/browse-ng.do?ic $_0&ref5871.137295&catNavIdA98
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I would start with a new or used old-people scooter and add servos to control the throttle and steering controls.
This should save you hundreds of hours of work and you will have something that has a charging system built into it and it can handle 200 lB of weight.
-howy

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