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Unread 02-01-2012, 23:08
Andrew Lawrence
 
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Re: Simple 2-Speed 6WD for teams with few manufacturing resources

Quote:
Originally Posted by Madison View Post
Alternatively, you could use the AM Shifter with a 4:1 spread between high and low. This puts it into the 11.7 ft/s and 4.6 ft/s range. That might be more in line with current sensibilities about drive speeds.

It might also be possible to use a 22 tooth sprocket on the Shifter output instead of a 16, but I'm not sure if that'd cause any interference issues. You can't go any smaller than 36 tooth on the wheels, really, because the chain will interfere with the spacers. That maybe isn't as much of a concern with the VexPro wheels as it is with the AM Plaction wheels.

Remember, the intent here is to provide a simple, robust platform for teams to use or reference. Frequently, beggars can't be choosers and so, by minimizing manufacturing complexity, you limit available choices for things like drive ratios.
That's more my style. I like where this is going. By using some final staged gearing, from output shaft to wheel sprocket, do you think a speed of maybe 13 to 14 fps is achievable?

I love your simple, robust platform! It made up for not having a game hint released today. 488 never ceases to amaze me with their creations, and I can't wait to see what you come up with this season! Thanks a bunch!