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#1
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Rookie Prototyping Materials
What suggestions are there for materials to have on hand for prototyping the first week of build season? This is my first year involved with a team that doesn't have a large stock pile of materials and parts from previous seasons.
Some things that I've come up with: Plywood and lexan Aluminum sheet, angle, and box tubing Nuts and bolts of various sizes 80/20 (Good for structural standoffs) Surgical Tubing Wheels of various sizes and hubs Motors from 2015 What else are we missing? Anything on this list that you don't think we really need? |
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#2
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Re: Rookie Prototyping Materials
I've always liked pvc piping and 2x4's.
Usually, we need lumber/wood screws to build goals and other field components as well. Something to drive motorized prototypes, such as an old drill handle or a servo driver. Last edited by Mark McLeod : 16-12-2015 at 22:22. |
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#3
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Re: Rookie Prototyping Materials
A hand drill, something to make 1-1/8 holes (hole saw?), bearings, hex shaft, wheels with hex bore, and you can have something rolling really quickly.
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#4
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Re: Rookie Prototyping Materials
Last edited by Ty Tremblay : 16-12-2015 at 22:16. |
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#5
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Re: Rookie Prototyping Materials
Do yourself a favor and only use only one or two hardware sizes. We historically have used #10-32 and 1/4"-20 hardware (though only rarely the latter, it really is overkill)
If by various sizes you mean lengths, then yeah that is fine. We mostly commonly use 1.5" for bolting panels to 1" extrusion, 2.5" for bolting two extrusions together, and .75" for bolting two or three panels together |
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#6
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Re: Rookie Prototyping Materials
10-32 and 1/4-20 are definitely the way to go for fasteners.
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#7
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We have standardized our team to using 1/4 20 nuts and bolts and 3/16 rivets.
Also add flat stock to your list it's very useful. |
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#8
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Re: Rookie Prototyping Materials
1/2" hex shaft and a 1/2" nut driver for spinning things with a drill.
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#9
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Re: Rookie Prototyping Materials
Get this darn thing - 1.125" Step Bit
I wish we would have had it when we first started. |
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#10
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Re: Rookie Prototyping Materials
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#11
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Re: Rookie Prototyping Materials
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#12
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Re: Rookie Prototyping Materials
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#13
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Re: Rookie Prototyping Materials
2x4's and 2x3's should be your go to material for prototyping. A lot of the best teams use them for prototyping. Look at 254 in 2014. Also, vex hex shaft and thunderhex is good because it can drive most wheels for prototyping and a minor modification makes them able to be driven with a drill. Watch the recent game sense series on prototyping. Other good materials are the igus products. Super quick pivots and mock ups of arms can be made using igus.
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#14
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Re: Rookie Prototyping Materials
Watch some of the 973 RAMP videos on designing with sketches in CAD. One thing we've been known to do is print off full-scale drawing templates to trace for our prototypes and actual parts. Works great and gives the students an additional visual aid in addition to using traditional measuring tools.
The trick is to build your prototype to a high enough quality that will allow you to actually learn from it. A flimsy prototype that falls apart on its first use isn't a good prototype. Wood is a great material because you can keep drilling and adjusting things on the fly too. For rookies, I'd highly recommend getting your AndyMark drive base assembled ASAP (have a few people start building it week 1, heck even day 1) and then attach your prototypes ontop of that frame to give you a more real-world test. Most teams use previous season drive base platforms but you most likely won't have that option. Last edited by Ryan Dognaux : 18-12-2015 at 09:32. |
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#15
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Re: Rookie Prototyping Materials
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It's probably obvious to you as you've done this before, but for rookie teams especially: Decide before you start building something whether it is a prototype or will be the competition part (subject to later modification, of course). If it's going to be a competition part, you'll want to do a more careful material selection and construction than if it is just a prototype to provide dimensions and such for the real mechanism. With a prototype, you can stretch dimensions and weight that you know you will have to tuck in when you build for real. |
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