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#16
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Re: pic: Team 973 2009 Robot - RAPTOR
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#17
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Re: pic: Team 973 2009 Robot - RAPTOR
it looks amazing i wish i got to see it work in person
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#18
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Re: pic: Team 973 2009 Robot - RAPTOR
Making the grooves wasn't too hard for us, I was referring more to putting a 1" ID through the entire 26" tube, is there a way to do that too? I'm not a very skilled machinist at all, I just know enough to get by. Does 254 drill out the middle of their rollers?
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#19
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Re: pic: Team 973 2009 Robot - RAPTOR
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The problem with them was that PVC is extremely heavy, and each roller would have weighed around 7-8 lbs. We ended up having to get a shop to remake them out of ABS for the weight savings. It's possible to drill a 1" through hole in the roller, if you drilled from both sides with a series of varying length drills, but that's obviously not an ideal solution. |
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#20
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Re: pic: Team 973 2009 Robot - RAPTOR
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#21
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Re: pic: Team 973 2009 Robot - RAPTOR
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They did the boring in two different operations. They stood them up on end in a very large CNC mill and used a series of drills of increasing length to bore all the way through. After they had the through hole they put them in another CNC mill and contoured the larger counterbore for bearings/plugs on each end. That's just one way of doing them. They can easily be done on the lathe with enough travel, or very accurately by someone who specializes in gundrilling. Our rollers this year were made for us by another sponsor who did everything on the lathe but the hexes on the ends, which they milled. |
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#22
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Re: pic: Team 973 2009 Robot - RAPTOR
The sponsor who made them specializes in all sorts of "tubing" and this really wasn't an issue at all for them. The lathes had several times the travel required, and there are all sorts of "accessories" that will stabilize parts will being turned (like a follow rest). Pretty much, I walked into their shop expecting them to say no as I was asking for too much, and they laughed like what I had given them was no challenge at all.
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#23
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Re: pic: Team 973 2009 Robot - RAPTOR
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