22-12-2015, 20:43
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,587
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Re: pic: Octocanum Module
Quote:
Originally Posted by GeeTwo
You could pivot on the mecanum, which would make the cantilevered wheel the traction wheel which has a 42 tooth sprocket, if I did my math correctly. This would be easy to mount sprocket to wheel on a dead axle. This solution would also require a change in gear ratio of your gearbox - in the direction that it will probably get simpler and lighter. This would also make high-speed mecanum your "default" drive if the pressure goes out, which may be a good or bad thing depending on your game strategy/style.
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This is a really bad idea from a durability perspective. If you make the traction wheel the pivoting wheel, you will have to deal with a lot more sideways loading on the module than if a wheel with rollers is the pivoting wheel. This has been a documented problem in other drop drives (e.g. 148's 2010 drivetrain) and isn't recommended if you don't have a really robust way to deal with the side loading.
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