Quote:
Originally Posted by Nathan4567a
So I've been looking around at the Robot in Three Days website and other sites trying to find an approximate rpm to run our collector. Does anyone know the rpm and or gear ratios they are using? I can't tell by looking and their cad didn't tell me much about the internal gearbox ratios.
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I don't think RPM is really what you want -- the surface speed of the roller will determine how fast the collector sucks up the ball. 100 RPM on a 1" roller is very different than 100 RPM on a 100" roller. To convert RPM to ft/s of the roller surface, RPM/60*2*pi*(radius in feet). I'm not exactly sure what ours spins at, but this is a great opportunity for critical thinking. Does it really make sense to have your collector spin at 20 ft/s? Do you expect to move the ball 20 ft in a second? If your roller starts slipping on the ball, you may pop it as some teams already have!