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Unread 10-01-2005, 02:38
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Greg Needel Greg Needel is offline
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Re: 2005 Drivetrains

Quote:
Originally Posted by Xufer
Im sitting arround here crunching some numbers and it looks like we will be all speed in high and all torque in low if we do a 3 speed we will have a happy medium.

i figured about 340 ft-lbs and 2 fps in low and about 95 ft-lbs and 9 fps in high.


this is not possible because you wont have the traction to transfer that force to the floor.... kinetic force = (coefficient of friction)*(the normal force)

since the coefficient of friction can;t be more then 1 and your normal force is essentially the weight of your robot (force that acts perpendicular to the surface)

therefore your max force can not reach 340 ft-lbs


i would recommend recalculating your theoretical force to a more reasonable value around the max weight of your robot but even that will be overkill and you will just end up spinning your tires
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Greg Needel│www.robogreg.com
Co-founder REV Robotics LLC www.REVrobotics.com
2014 FRC World Champions with 254, 469, & 74

Last edited by Greg Needel : 10-01-2005 at 02:42.