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Unread 31-10-2014, 10:33
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Ty Tremblay Ty Tremblay is offline
Robotics Engineer
FRC #0319 (Big Bad Bob)
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Re: pic: 319 Octagonal Drive Isometric

Quote:
Originally Posted by JesseK View Post
FWIW the 2 CIM Ball shifter with 3rd stage option looks like it has an output shaft that would be extremely simple to create out of steel hex on a lathe. Cut to length, face on the lathe, 3 lathe operations, then tap and you're done. Would take about an hour for both axles. It'd give you 2 spare axles for the outer wheels as well.

This assumes the steel hex fits everything though.
Yeah. It's easy enough to make out of steel. The FEA I ran put our factor of safety at >2 with 7075-T6, I could even go with another Al alloy (2024-T4, I think it was) and get an even better FOS. The benefits of running the chains on the inside of the rails just outweigh the benefits of running them on the outside now.
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