Definately not polycarbonate screwed together with bunnings screws
stainless >2mm probably a good call
I used 2.5 mild steel for a while and it got a bit munched by the previous generation of nasty horizontal spinners (cyberpolice, etc), but not terminally so _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Tue Nov 30, 2010 8:18 am
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
I used 1.6mm titamium on my first beetle - it was seriously bent by Glen's horizontal spinner but didn't break. With better design, I think 1.5 to 2.5 Ti is the thickness range to look at
Tue Nov 30, 2010 11:57 am
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
yeah we have already evolved to Ti for both beetles and ants, bort and i were discussing this on the trip back
that was one hell of a short honeymoon period of getting away with 'low technology' for the insect classes! esp. the beetles! _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Tue Nov 30, 2010 1:19 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
hmmm hard to say actually. Carbine had a good crack at the 1.2mm carbon fibre i had on cyber police and frayed it up a little but nothing too bad. id build a robot from 2-3mm carbon aaron had some plate from hobbyking and it looked great. cheap too.
the 1.2mm grade 5 titanium crazyvaclav was made from cost me about $20 shipped from ebay UK for a 50cm x 30cm sheet. i got demons lid out of that piece too. Its really strong but is rather flexible. and would also use it again.
As for hardcore armour i really dig old style saw blades. the ones that were just made from a really hard steel without carbide tips. they're about 2mm thick and the stuff is just so crazy strong. all of cyber police was made from it. Id use that for a brick style robot thats for sure
Thick plastic i think would work well as well. A few of angus' robots were done from that and stood up well.
Still hard to say though.. every metal has its place and purpose just like featherweights..early days yet. Thats why i enjoy the new class so much, trying to work out the best combos for everything.. armour thickness, robot size weapon weights etc
And antweight and beetle sizes though expensive materials like carbon fibre and titanium are plenty viable though. You could probably belt out 5+ robots from $50 worth of the stuff.
Tue Nov 30, 2010 1:28 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
yep i also had some hobbyking 1.5mm carbon fibre on the back of Polycarbine, very good quality, tho i think at that price point Ti is better value (tho harder to work with) _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Tue Nov 30, 2010 1:44 pm
dyrodium Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
I think we all know the best armor is bunnings ali L bracket
But yeah seriously, HDPE chopping board is perfect and costs nothing. _________________ ( •_•)
fiberglass sounds like it'd be well suited to beetles, very free form, damage is loacalised, and you could knock out a frame every 40 minutes if your keen ;->
If we can get sufficient interest dads happy to give a demo/instructional/how to at his place. _________________ Mechanical engineers build weapons, civil engineers build targets
Tue Nov 30, 2010 6:05 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Thinner Ti sheet is dead easy to cut up with an angle grinder - I did all mine that way and curved edges are reasonably quick to shape on an bench grinder after you have a cut a straight-edged part.
Drilling Ti is fairly easy as long as you don't need huge holes - start with a small diameter and step up 1 or 2mm at a time
Tue Nov 30, 2010 6:21 pm
seanet1310
Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide
quote:Originally posted by Valen:
fiberglass sounds like it'd be well suited to beetles, very free form, damage is loacalised, and you could knock out a frame every 40 minutes if your keen ;->
If we can get sufficient interest dads happy to give a demo/instructional/how to at his place.
If you do any chance you could film it or something for us poor non nsw's guys ? _________________ Remember to trust me, I am an Engineer.
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