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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.
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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