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One thing that is very important is that meshing gears are the same Diametral Pitch (DP) and Pressure Angle. Mating different DP and Angle will cause gears to self-distruct over time. Of course this has been made to work in this competition due to the short duty cycles and ususally only with the drill motors due to their 0.7M metric DP.
I discuss gear ratios and how to choose center distances in Team 716's Dual Shifter white paper (sorry, haven'y learned how to insert the link) posted here 10/7/03. It also discusses how to choose gears so that adjacent gears that should not mesh can be selected.
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This is about more than building a robot, we cannot only do the fun things. If you are fully involved than you will be prepared to do anything in life. - Andy Brockway [more] 
Hybrid Mode
