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#16
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Re: pic: 2011 Drive Prototype
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#17
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Re: pic: 2011 Drive Prototype
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#18
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Re: pic: 2011 Drive Prototype
Also if anyone hasn't noticed, there are two different heat sinks on the CIMS. Does anyone have any comments and/or preferences.
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#19
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Re: pic: 2011 Drive Prototype
I doubt you'll need much heat work on the CIM's unless you're REALLY overworking them. We never had any heat issues on any of our robots.
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#20
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Re: pic: 2011 Drive Prototype
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I like where the model is headed, keep up the good work. |
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#21
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Re: pic: 2011 Drive Prototype
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I will be doing the welding, but i have done 1/16 before so it wont be too hard. |
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#22
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Re: pic: 2011 Drive Prototype
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#23
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Re: pic: 2011 Drive Prototype
I wouldn't worry about heat, I can only speak from personal experiences, but my team has never come close to burning out a CIM. We have had some issues with the Denso motors though. If a CIM overheats, it will likely be a result of multiple matches, and not one tough match. My team leaves a can of Dust-Off on our cart. It's very cold and a quick spray will cool off your CIMS. It is also made for electronic devices, so it can't do damage if it gets into any part of you circuitry. You have time to cool them between matches, even in the finals, and this way you don't have to worry about one extra part on the robot (or fraction of a pound, which we all know means a lot when you go to get inspected).
Last edited by sgreco : 28-06-2010 at 16:54. |
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#24
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Re: pic: 2011 Drive Prototype
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Also, I swear by this guy's advice. He really knows his stuff and is super responsive to emails. Good luck! |
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#25
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Re: pic: 2011 Drive Prototype
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For the original poster: How do you intend to manufacture your gears? I'm guessing our 2007 robot was the inspiration for this design based on some of the aspects you've chosen to incorporate. If you've read much about that robot you'll have seen that everyone involved with the robot agrees that it's simply not worth the time and cost to make aluminum gears, for the ~2-2.5 lb weight savings. Additionally we have moved away from delrin in the past two years. It flexes too much and isn't as durable as aluminum. If you have access to a waterjet it becomes very easy to make pocketed .250" aluminum gearbox plates which will be comparable in weight to .250 delrin but much more rigid. If you have access to a CNC mill, which I assume you do based on your design, it's a little more work, but still fairly simple. If you intend to make this as a prototype, you should probably understand the basics of how the design actually works. If you're just copying it and drawing it in CAD with no understanding of why things are done the way they are, then what value is that bringing to your team? Last edited by Cory : 28-06-2010 at 17:32. |
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#26
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Re: pic: 2011 Drive Prototype
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Delrin is an easier material for us to mill because we do not have access to a vmc yet, just a prototrak machine. I do understand how the design works, just i did not want to give him wrong information so that i do not confuse him. PM me so that i can explain. Last edited by MWB : 28-06-2010 at 17:44. |
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#27
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Re: pic: 2011 Drive Prototype
Why the secrecy with the tensioning method? I have to assume that most all of your design inspiration exists because of a lack of secrecy and the willingness of others to share ideas and to develop understanding.
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#28
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Re: pic: 2011 Drive Prototype
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or a design. So we might not even end up doing the design. |
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#29
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Re: pic: 2011 Drive Prototype
You shouldn't need either, and if I correctly understand how the CIMs dissipate heat from what I've been told by people smarter than me, they won't make much of a difference. Your CIMs shouldn't be burning hot at the end of a 2 minute match; if they are, you probably have bigger problems with drawing tons of current and draining right through batteries.
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#30
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Re: pic: 2011 Drive Prototype
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