Quote:
Originally Posted by magnets
Lets say that you have the motor spinning at 15000 rpm. With a 50:1 reduction, that's 300 rpm for the wheels. The wheel circumference is about 7.9", so that gives you a max of 2370 feet per minute of travel, or 40 feet per second, which is too much.
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Aside from the motor spec being incorrect, this math is also flawed. Divide by 12 to convert from inches to feet. Also the incorrect formula for circumference was used.
C = pi*d = 3.14*5 in.
C = 15.7"
300 rpm = 5 rps
speed (inches per second) = 5 rps * 15.7"/revolution = 78.5 in./s
speed (feet per second) = 78.5/12 = 6.5 fps
This is on the slow side of somewhat reasonable speeds for a robot using FRC motors. That being said, I have no practical experience with RS775-18 in a drive system, so use at your own risk.