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#1
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Re: pic: Simple Chain-in-Tube Concept
Have you been successful with #25 chain in the drivetrain? Im working on one right now and it is spaced for #25 chain.
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#2
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Re: pic: Simple Chain-in-Tube Concept
We've used it for three drivetrains now without any issues. I've never seen a chain break, only get thrown when there is angular misalignment between two sprockets.
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#3
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Re: pic: Simple Chain-in-Tube Concept
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I presented our original idea for the Quick Build Drivetrain at the Hampton Roads FRC Summit in 2012. I gave an update and a description of our West Coast drive train development program at the 2014 FRC Summit. Correction: While our 2015 bot used WCD side rails, it technically was not a true a west coast drive. We took the center mounted gearbox and moved it to the end opposite the crate stack. Then we omitted the center wheels and replaced the front Colson wheels with omnis. (Pics in the picasa galleries linked in my sig.) The internal power transmission components, however, are identical to the West Coast drive train we developed over the summer of 2014. This fixed-spacing chain-in-tube design, won us two regionals and took us to the quarter-finals at CMP with literally zero maintenance. I think that once we got to St. Louis someone said, "Hey, shouldn't we put some more grease on the gearbox gears?" Caveat: the 2015 game was super easy on drivetrains, requiring neither high speed nor pushing power. Last edited by ToddF : 10-06-2015 at 14:27. |
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#4
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Re: pic: Simple Chain-in-Tube Concept
I've made a few updates to this drive train.
Updated model No welding setup No welding drive rail Last edited by Ty Tremblay : 29-12-2015 at 13:08. |
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#5
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Re: pic: Simple Chain-in-Tube Concept
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#6
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Re: pic: Simple Chain-in-Tube Concept
I have not. I used the mantra of "copy the best and invent the rest" (thanks Mike Corsetto).
I took inspiration from 118's 2014 CAD as well as 971's one-bumper manufacturing style with reinforced corners. ![]() We plan to do our own testing, but if 118's design lasted the season in Aerial Assault, my initial hunch is that our more conservative design will too. |
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#7
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Re: pic: Simple Chain-in-Tube Concept
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I'm not quite sure how they mounted it but my guess is they just tapped the ends of that tube or round stock and bolted it onto those large 2x1 uprights. IIRC the inspectors made them lift their robot by their "Bumper supports" (The round stock in the screenshot) in order for them to pass the inspection proving that "Those actually do support the bumpers". They used those large holes with large threaded bolts attached to the bumpers to mount their bumpers to their robot. If I were to use what 118 did, I would in fact just use a piece of aluminum rod or even thunderhex shaft that is tapped to do what they did in a similar fashion. |
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#8
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Re: pic: Simple Chain-in-Tube Concept
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