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#1
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Re: Who makes their own wheels?
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#2
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Re: Who makes their own wheels?
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The implication I took from the troll post was "don't worry about design and copy what 2056 does." |
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#3
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Re: Who makes their own wheels?
How is that a troll post? The poster is simply referencing another thread on pretty much the exact same topic.
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#4
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Re: Who makes their own wheels?
A link to a post with a link to a stupid video is a troll post.
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#5
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Re: Who makes their own wheels?
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Devin stated a lot of our teams development over the past 4 years. Just as a heads up, the kids are designing a pneumatic catapult on a turret this off-season, pretty much just because we've never done one before. We'll train new kids and add two more mechanisms to our team knowledge base. Its a valuable process that I encourage other teams to try out (we stole the idea from 971 and 973) "Steal from the best, invent the rest" is something I've been saying for a long time. I probably stole the quote from someone/somewhere, but its been so long I can't remember Would it irk people in this thread to know I will sometimes encourage our students to copy designs even if they don't understand everything about the design they mimic? Our students are some of the brightest kids I've met. I can say with 100% confidence they are 10x the engineer I was when I was a student in FRC. Their communication and technical skills amaze me every year. If my students don't understand a few things, I won't lose sleep over it. Inspiration is why I'm here. Regardless, good on you Clint, please share your results! We have some wheel CAD from 2014 on our site (I think!) if you're interested. -Mike BTW, funny story. We tried 3D printing some 4" wheels on our makerbot during the first week of build season 2014. Never again! We had Aluminum custom wheels back from our machine shop sponsor by week 3 that year... Live and learn!Last edited by Michael Corsetto : 27-07-2016 at 17:29. |
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#6
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Re: Who makes their own wheels?
841 has done the custom wheels R&D project, and the students involved at the time got some really solid benefits out of it. We still have the Google Doc that all the research was compiled into, and have used the polyurethane learning for other mechanisms since then.
A couple years down the line now, we've decided the last two seasons that Colsons make more sense on the actual robot, as they offer better durability and more predictable performance than the polyurethane tread we had on the custom wheels. We've recently upgraded our machining capabilities (our first CNC equipment!!) and I'm thinking it might be a good year to suggest the students take another run at the wheel problem in the offseason. It's a nice simple piece that we can make "as complex as we want to" to try out the new machining abilities. |
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#7
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Re: Who makes their own wheels?
I'm going to chime in here because I've watched this blow up without any explanation on why we are building wheels other than the intent to teach students the process of manufacturing.
This year we bought some wheels. (I won't say what wheels, they were plastic.) We used them during build season and they failed. We are building our first WCD this offseason and are trying to keep it as cheap as possible. We found that aluminum wheels are very expensive, so we found that it would be cheaper to just buy aluminum blocks and make them ourselves (about a 50% savings). Thank you to everyone who gave advice about making wheels. After a very successful year we are trying to venture out and try some new things. We've made the same drivetrain for over 10 years. It has worked well for us, but we see the advantages of WCD. Expect to see more posts from Clint asking questions about certain things, we need the help. P.S. Part of our inspiration for doing this project was the released materials this offseason. We specifically looked at the CAD of 254 and 1678 on how to make a WCD. ![]() |
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#8
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Re: Who makes their own wheels?
I'm going to assume the wheels you bought weren't pneumatic wheels. Keep in mind that if that is the case and you replace them with aluminum non pneumatic wheels it wouldn't be surprising to see similar failures if used to play the 2016 game, given the impact forces robots see while crossing defenses.
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#9
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Re: Who makes their own wheels?
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#10
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Re: Who makes their own wheels?
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The great thing about a WCD is that it's so easy to swap wheels. You mentioned in the last thread that you drove the pants off the wheels until they failed (which is an absolutely great way to test things). If you have the budget and the time, I'd finish your custom wheel + WCD project and grab a bunch of the various common FRC wheels (Colsons, AM Hi-Grips, VEX Traction, your custom wheels will probably end up being similar enough to AM Performance wheels) and drive the pants off of all of them. |
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#11
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Re: Who makes their own wheels?
Did you use loctite?
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#12
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Re: Who makes their own wheels?
We applied the Loctite after the hubs had failed. That was the controversial issue in that thread.
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#13
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Re: Who makes their own wheels?
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If ANYTHING, it adds to the discussion by bringing relevant info from another thread. And to be really honest, he linked you to a thread that you COULD have found if you searched. Quote:
There is a reason Mike Corsetto says "Steal from the best, invent the rest" in every post asking why 1678 is so good. No one is trying to tell you to copy 2056. But, from experience and the obvious testimony in this thread, designing a custom wheel IS NOT the best use of time, resources, or knowledge. You'll find much better use of time and I think students would find a better experience designing a different custom mechanism, like maybe an elevator, a more complicated drive train(that uses COTS, most drives SHOULD), or something that is a bit more complicated than something I can make in about 3 clicks in CAD. Last edited by bkahl : 27-07-2016 at 11:26. |
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#14
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Re: Who makes their own wheels?
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#15
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Re: Who makes their own wheels?
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"I have never built a WCD before and don't feel comfortable switching to this different type of design, so we are building one this off season so we don't make stupid mistakes this coming build season." We used custom traction wheels in 2013 and 2014 because it mattered. In 2015 there was near zero reason for that level of traction so we ran colson. In 2016 we ran pneumatic and colson because we knew that the custom wheels would not provide the durability needed to survive the game. All those decisions were based off of prior experience, personal or leveraged from the community. |
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