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Re: Crazy Drive Train Ideas
How about if pneumatics are used to drive a large plate full of small spikes into the carpet under/beside the robot and consequently either keep the robot from being pushed out of position, or "inexorably" move it forward by out-pushing another robot. The large plate(s) plus the many, many small spikes are a way to get more "friction" than is available from gravity pulling wheels into the carpet.
The plate has to be large enough to spread the force over enough carpet to avoid damaging a FIRST FRC field. The spikes have to be numerous enough and small enough to avoid damaging an FRC field. The lateral/pushing force generated/resisted has to be high enough to be useful (at the moment IDK what that value would be). Instead of trying to use pneumatics to set the plate(s) and move the bot, the mechanism could perhaps rely on a high-torque motor (the pneumatics set/lift the plate. The motor moves the robot relative to the plate.). Two plates could be alternated to move any given distance (at some slow-ish speed) by putting one down, then moving the max distance possible using one plate, then putting the second plate down and transferring the forces onto it, then picking the first plate up.... Lather, rinse, repeat. Of course if the FRC game in question (Overdrive, for example) doesn't encourage pushing contests - Never mind. :) Blake |
Re: Crazy Drive Train Ideas
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Another possibly simpler mechanism is the clutch used on nitro and gas Rc cars. A hollow round (called hte clutch bell) has a gear that drives the gearbox, inside the hollow round is a device driven by the motor with clutch pads sprung loaded in. As the rotational speed of the motor increases, centripidal force causes the clutch pads to move outward and engage the clutch bell. Solves the direction issue, and could be done with COTS components, many larger cars certainly put out more power and torque than a CIM. This would be better suitted for adding in hte 5th CIM to the drive. With all that said, I believe a boost is a poor choice to just adding more motors to drive. And with that said, I believe adding more motors in drive is a poor choice compared to adding shifters ;). |
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