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Phyrexian Robotics
Joined: 31 Aug 2012
Posts: 7
Location: Athens, Georgia USA
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#25 vs. #35 chain
I'm using 2 EV warrior motors (essentially huge-ass scooter motors) in the drive of a featherweight. The end product should be a fast drivetrain-centered pushbot with large (~20cm) wheels something like vendetta.
Using the team tentacle torque/AH calculator, I determined I needed somewhere around a 7 or 8:1 reduction to get the speed, torque, and current draw I want. I was originally going to use #35 chain for the reduction, but due to the size of the wheels and sprockets I could feasibly use, I would not be able to achieve the reduction I needed in a single stage.
I can't decide whether I should use #35 chain and a 2 stage reduction or #25 chain and a single-stage reduction.
#35 chain is stronger and less likely to skip, but a second reduction stage adds a second potential failure point to the drivetrain and takes up weight and space. #25 chain would be weaker, but it would be lighter, simpler, and more compact.
I have seen both #25 chain and #35 used in featherweights, but since the drive I am using is more typical of lightweights than featherweights, I was wondering if #25 chain might be marginal and using #35 chain would be worth the added weight and complexity.
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Tue Sep 25, 2012 10:02 am |
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