ah... so it begins... finaly
http://photobucket.com/albums/v424/dyrodium/?action=view&current=P2130050.jpg
More details later...
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i think you should just enter that, just cut holes for the wheels and duct tape the boxes togther, put the controller in one of the boxes, (take the charger out)
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Mechanical engineers build weapons, civil engineers build targets

I think that would be be classed as an MDF bot too, since MDF/Cardboard are nearly the same fo shizzle
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https://www.halfdonethings.com/

Shh! Don't give Prong any ideas - he makes cardboard & gaffa tape a deadly combination
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Its ok, I already asked Jake if I can use cardboard in the mdf class

LOL
Nick also, i may need your help with a large one side supported shaft and bearing for an overhead bar
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Well, glen has worked his CAD magic over my pretty crap one... so without further ado, i give you cataclysm rev 2

Specs;
Drive :4 12v drill gearbox's
Weapon :Two undecided 12v beefy weapon motors friction driving a 3kg bisalloy bar.
Batteries: Two 12v 2400mah nicad packs for both weapon and drives
Controler: My precious new ibc
Amour: 10x10mm steel box section (yet to be sourced), or possibly aluminium.
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Have you done any weight calculations ?

A 4WD, dual-weapon motor, Steel-Armoured, Twin Sanyo battery pack, 3Kg bar spinner ?? I doubt it.
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yes i have in fact, it is 4kg underweight. ive said it once and ill say it again. building it kang style by bolting it all to the top will instantly ditch a good 2kg with no disadvantage. added to that the bot is tiny. 270 x 270 x 50 at the body. and the sides and outer armour is all 0.8mm stainless. the box section does all the supporting. i think he will be able to run it off a single 2400 pack anyway lol.

i reckon if he bolts a stupidly oversized flanged bearing onto the top, like 35-40mm worth of bearing and tool steel shaft and itll be in buisiness. well aside from the very very shitty friction drive but im looking at bolting a magna fan upside down for a belt drive oh crap am i designing someones robot again XD

CATACLYSM WEIGHT CALCS

steel 7.8
aluminium 2.7
uhmw 0.9
lexan 1.2
Titanium 4.47
Stainless 7.9

PARTS WEIGHT (g)

Drive train
Colsons x 4 600
12v drills x 4 1600
Batteries 1100
IBC 310
Drill motor mounts 57.6

Frame and armour

Box section top chassis 1078.272
Stainless outer armour 336.96
Stainless top covers 127.296

Weapon
Bar 2962.752
Shaft 268.008
Motors x 2 1000

TOTAL 9440.888
WEIGHT TO SPARE 4159.112
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Well, if you can manage that it will be good.

I was thinking of K.O. - Its drill motors sit closer together than they appear in your cad drawing, and it has no active weapon, motor, bars or otherwise, although it does have a heavy frame.

It will be very interesting to see how close the (presumed) CAD mass calculations are to the final result.
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Great minds discuss ideas. Average minds discuss events. Small minds discuss people

yeah but consider that KO is 3mm steel all over compared to .8mm just on the sides of this, and KO has a big 3d square of box section, this is just a lattice work at the top. i reckon if it takes a hit to the sides or anything its totally dead

the weight calculations are always pretty good. this is the one on cobra and that was 12.7kg at robowars.

COBRA WEDGE WEIGHT CALCS

steel 7.8
aluminium 2.7
uhmw 0.9
lexan 1.2
Stainless steel 7.79

PARTS WEIGHT (g)

Dewalt shafts x 2 212.004
2x Dewalt with support kits 1750
12v 2400mAh nicad packs x 2 1100
victor 885 speed controller x 2 454
Colson 3" x 1.5" wheels 354
Spektrum reciever 7
Bearings 100
Power switch 40

FRAME

Wedge 1518.426
Wedge mounts (bolt on) 246.4756
Wedge triangle supports 62.01
Wedge side panels 319.6206
Side panels 818.61
Rear panel 791.466
Lid 550
Base 2721.03
Rear angled panels 852.852
Triangles 191.0108
Battery mounts 568.548
Inner bearing blocks 127.278
Outer bearing blocks 216.648


ACTUAL 12700
DEVIATION -88.975
TOTAL 12788.975
WEIGHT TO SPARE 811.025

just playing around i reckon you should do this angus... forget the crappy friction and jaycar motors and just use a magna fan motor belt drive.

http://img.photobucket.com/albums/v357/Cobrarobotics/Roadkill/roadkillbelt.jpg

http://img.photobucket.com/albums/v357/Cobrarobotics/Roadkill/roadkillbelt2.jpg

but now you gotta go and build this angus lol eh eh i hope youve learnt to use a grinder and can cut 3mm polycarb straight now
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

4kg?
thats enough to
a) add some non sucky armor to the sides
b) boost the wep motor
c) add a second wedge bot as a cluster entry

personally i'd go for b or c ;->
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Mechanical engineers build weapons, civil engineers build targets

That size bar with that fan motor would have a suckful spinup time...
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https://www.halfdonethings.com/

quote:

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Haven't yet been able to locate grub screws for the drill (also, which size do you need?)

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Here is a sketch of the weapon mount: http://www.lovingangels.com/Nick/Cataclysm_weapon.pdf . It's an update of Orbit's weapon; I added thrust bearings at either end of the shaft and made the whole assembly thinner, which will reduce the bot's weight. It might also be possible to use a smaller pulley, although the range of aluminium pulleys is pretty miserable.
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion