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Re: From The Ground Up (Advice Thread)
alot of foam
alot of foam
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Re: From The Ground Up (Advice Thread)
Sorry, I made that sound like I needed the volume filling, what I mean is, I have 7kg left and I have 100 by 300cm of armour that needs fitting and I don't know what would be viable materials at that weight, nor how I could reduce the current weight or size. I'm really at a stand still!
Edit: Solved the issue, I realised that I could reduce the weight, I'm ruddy tired and not thinking straight, sorry about that.
Are Trollied, Wasted, or Hammered available as Robot names, I haven't heard of them before but I thought I'd just check?Comment
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Re: From The Ground Up (Advice Thread)
3m * 1m of armour? you could cover a heavyweight with that much
Going by your dimensions and design on page 5 you should only need about 4000 sq cm of armour max not 30000
You're currently looking at 2-3 mm of hdpe or 1-2 mm of polycarbonate/cfrp/gfrp and probably nearer the lower end of those ranges so not the best armour.Comment
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Re: From The Ground Up (Advice Thread)
I didn't notice either that I'd calculated 30000 cm sq
(so tired)
After my new designs (Page 5 is quite outdated) I have 3800 cm sq to cover with armour, and according to http://www.jindalstainless.com/toolkit/ ... lator.html 15mm HDPE at high end HDPE standard at directplastics - 96 g/cm^3 (checked the density on their data sheets) equates to 5.5kg rounded? One of us has done wrong calculation, and chances are it's me.Comment
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Re: From The Ground Up (Advice Thread)
Correct mass, missing a decimal point in the density though (0.96g/cm^3)
It's time to go to bed when you start designing robots with materials 6 times more dense than the sun as armour
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Re: From The Ground Up (Advice Thread)
Good advice if ever I've heard it.
And I'm sigging that if you don't mind!
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Re: From The Ground Up (Advice Thread)
It's probably more than 6 times if you include the corona that goes stupidly far into spaaaaaaaaaaaaaaaaaaaaaaaccee...Comment
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Re: From The Ground Up (Advice Thread)
Just noticed my battery packs exceed the perimeters for sabretooth controllers, 25v with 42 batteries? Way over. I'm assuming I can modify the packs I've bought so that I use less cells, this depends on how much current I need, would 3300mAh be enough for a 4wd 18v pusher?
I think I could modify it and change them to two packs of 12v 3300mAh, but that would leave me with 20 cells, which I noticed Gary said in another thread burnt out sabretooth controllers he had bought. 10.8v batteries? That keeps me in the perimeter? Aaaaah
Edit: Or simpler, 25v with 21 cells, that doesn't exceed the perimeters by much and drops half the cells? Thoughts are desperately needed!
Thanks againComment
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Re: From The Ground Up (Advice Thread)
Hm, does anybody know any good countersunk allen head screw vendors? Me typing it into google only shows up naff results.
Thanks!Comment
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Re: From The Ground Up (Advice Thread)
I got some recently from this eBay seller: http://www.ebay.co.uk/itm/M6-X-30-COUNT ... 1047wt_905
He has different sizes and quantities too.Comment
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Re: From The Ground Up (Advice Thread)
10quid for 100?? get yourself down to a fastners place, think i paid about £2 last time for similarComment
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Re: From The Ground Up (Advice Thread)
Found a site that sold m6*40 for 6 quid or something, only bought 50 though.
Couldn't find anything called 'fasteners place'? eBay seemed to expensive though.
Thanks anyway guys!Comment
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Re: From The Ground Up (Advice Thread)
where you based?Comment
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Re: From The Ground Up (Advice Thread)
Lewes in East sussex, same as the Terror Turtle team. I'm up in Whitby, Yorkshire at the moment though. I don't think there are many east sussex roboteers.
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Re: From The Ground Up (Advice Thread)
Active teams i can think of are Turtle, Big Brother, Barbaric Response, not sure about feather teams.
Just search for Fasteners in google or yell.com, most will have a trade counter.Comment
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