Thread: KingKrab
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Unread 04-12-2008, 16:46
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Re: KingKrab

We bought them from mcmaster, and the calculations were based on the modified Lewis Bending Numbers Equations for Miter gears.

Quote:
Originally Posted by M. Mellott View Post
My apologies for these questions, but I don't have access to YouTube at work, so all I have to go from is the CAD models (excellent work as always, btw)...

- Are the connections, including those within each wheel module, chain or belts? You probably just used simplified models, but I wanted to be sure.
- What size chain/belt are you using for each location?
Chains, we just use a simplified model based on sprocket pitch diameter and chain height/width to check clearances. The models are actually based on the output of Dr. Joe's Chain Path visualizer (which we slightly modified to calculate the weight of the chain based on length as well, so we added that as a custom property so the chain weight is accurate).

We use #25 for the steering loops and for within the modules and #35 for the drive. Technically we could use #25 for the main drive loops and It'd be strong enough, but a single drivechain failure renders the robot immobile. We've considered two parallel runs of #25, which would still be lighter than the #35.