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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
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I was just pointing out that you can't get two 5' 2x4s from a 10' 2x4, but even that's not true, apparently. As with their width and height, I'm told, 10' lumber is actually not 10'. It's a bit longer. Or so says the guy who works at Home Depot. (This is why I hate lumber.) |
Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
are you sure it's longer? i thought it was approx. 1/16th shorter because the mill has to cut it down so some of it becomes sawdust....not that it makes a huge difference... but it might to my engineer team membes :)
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
Very, Very difficult to roll a sheet of Lexan, even 1/8"
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
We curved lexan on our front hardware shield in a 90° arc. While bolting it down we heated with a heat gun for 15-20 minutes. Wheen I took off the pieces after they had been bolted at that angle for over a year the Lexan sprung back flat with only minor deflection. :ahh: maybe we did something wrong but im pretty sure you won't get too much of a bend.
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
After further thought and discussion with some people, I believe I was incorrect on my assumption that we wouldn't have to drive on the lexan. Not that this means anything to anyone...
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
In regards to the bending of lexan...
Last year we made a lexan "hood" out of 1/8 Lexan and it had a slight bend in it...this bend however slight it was stayed consistent This was acomplised by the use of a heat gun |
Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
if u read up on one of the items it is called luan! the person who works at home depot and found out the mailbox thing also gave us info that luan is very flexible. it is used as a sub floor in damp areas. yes it is for damp areas but keep in mind water is messy and bad for the robots so its DEFINETLY NOT being used for its water proof purpose but probably more for its flexibility.
i also just thought of the fact that they are trying to keep the field cheap so the lexan could be used as part of an end zone that the players stand behind because it may be an obstacle for the human player as in '04. but 2 sheets? that makes me a bit skeptical that i'm somewhat correct. but hey its just a guess! |
Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
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Because that is not what FIRST used on the vision tetras. (Or atleast... thats not what my team OR Mike Wade's field used.) They used the roll of green "sticker-like" material stuck to a piece of plastic. Three of which were then attached to each vision tetra. (Which I think came in the kit of parts.) I think they will keep the cam... just like keeping autonomous... because they are a challenge. |
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
The lexan and diamond plate will be driving/manipulation surfaces of great importance. In 2004 they didn't have us get lexan for the top of the platform...there wasn't that much shoving and it was level. But in 2003 they had us get the HDPE because it's slick and the copper mesh because it was the ramp. They were important driving surfaces - difficult driving conditions and lots of shoving (king of the hill).
My guess is that since there's 96 sq ft of special surface here, we've got another ramp to deal with! Woe is me. I hope I'm wrong :) |
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One thing I have always wondered is how is lumber sold in countries that use the metric system? Do they buy 4cmX9cm boards rather than 2x4s and 1.2mX2.4m sheets of plywood rather than 4x8? Seems kind of odd to me either way. Why would a country that uses the metric system sell a 4' x 8' sheet of plywood? Maybe their dimensions are totally different and you would buy a 1m x 2m piece of plywood. Anyone know what the European version of Home Depot sells? I wonder if the International teams have a problem finding 10' 2x4s and 4'x8' sheets of 1/8" Lexan? |
Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
The lexan will be put on the bottom of moveable goals so they slide around. That is my prediction.
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
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I am not counting on robot vision systems (CMU or otherwise ) to be going away, especially based on the list. I just hope that my team will be more successful with vision should it be there for us to utilize this year. |
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
The Lexan and diamond-plate are optional - they could be substituted with smaller pieces or other materials.
My guess - the lexan will enclose or bound something. It's clear so the audience can see what's inside, but it is not critical for the operators to see it. (Maybe because the robot is "seeing" something autonomously?) Thus for practice a team could substitute cheaper plywood. |
Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
Hey, has anyone noticed that these carriage bolts are 16" long? I have no clue what is on that list that would need bolts of that length. Corners between 2x4s? Any ideas?
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
okay, thanks for clarification
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Informat
Has anyone had any luck finding the #7 deck screws? I got the #8 no problems.
I've tried Home Depot, Rona, HomeHardware and Brafaso....none of them had size 7. (Nearest thing I found were #7 wood screws @ home depot, but they were too short) Thanks for any help :) |
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Re: **FIRST EMAIL**/Advance Materials List and Autodesk Virtual Kit of Parts Information
Lexan is slippery. Diamond plate isn't. Looking at all the lumber - there will be platforms, steps, or a combination. Goals will be bins or raised troughs.
I can see the goals being on raised platforms, that have lexan on them. Both defending and scoring on a lexan surface will be 'interesting.' I think the theme song for this years competition will be: "Slip Sliding Away." |
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"Slide, slide, slippidy slide living the in the city its do or die" |
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"And if you see my reflection in the snow covered hill, well the landslide brought me down." Actually, a lot of the other lyrics too can be related to a potential FIRST game. Interesting... |
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Oh man, I just dated myself again. |
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