Skip to main content

Big Orange and Dangerous

Ancient History
Killer carrot 2 is a much more serious bucket of fish than anything else we've so far attempted. At first we thought we'd like an axe, a flipper, a disc cutter....and these sketches show what we came up with:
disc cutter and ramming spikes, keeping carrots original big wheels and running upside down configuration
Spiked flipper and nose spike (real back of the envelope stuff)
Inspiration comes from those robots that achieved success without fancy weaponry, but by sheer brutal ramming power.
Watching Tornado smash Gemini against the arena barrier when we were reserves, I became convinced this was the way to go.
However being an agricultural fellow we have access to a range of nasty things to ram people with. The whole design of carrot 2 rotates around a large bale spike, focussing all the punch into one point instead of tornado's multiple points.
First step was to visit our local kart race track who gave me 4 wheels and tyres, thankyou Crawley indoor racing.
Then we managed to procure some more meaty speed controllers, a pair of 4QD NCC 60 24's which put out about 70 amps hot, and around 100 cold. What's worrying is that the guys we bought them from  (Rotracktor) are moving up to 300amp speedies! They generously donated a spare DCI board which means I don't have to salvage anything from Carrot 1, and with a bit of slimming down he should be up for the middleweight class for Wilson's day 2001.

Comments

Popular posts from this blog

Fake Plastic Trees...

So, for a bit of light relief I bought a few of Justin's LED Christmas tree kits. I think the original idea was to have a relatively easy kit to put together on Saturday workshops in the run up to Christmas, but they seem to have become quite popular with all manner of folk. Anyway, the kit is based around a couple of well made pcbs, a bag full of components, and the simple instruction that +ve is UP. It took about 10 mins to solder all the bits together, and with a huge amount of satisfaction over the end result. Justin and his Christmas tree kits can be found here: http://cyber-lane.com/ The Build Brighton Christmas workshops will be running each Saturday from 30th November to 21st December from 10am – 2pm. Entrance is completely free. Kits are priced between £2 and £5. #BuildBrighton can be found here: http://www.buildbrighton.com/blog/

robot rebuilds

For two years in a row I've missed out joining in with Ian Watts robot bash at the Uni. So I'm making sure I've got something running before it swings around again. So I welded a couple of new gearbox cages into the 4 wheel push bot, and dug out a set of Electronize speed controllers. I fitted the titanium plate that has been cluttering the basement for a decade and have been doing some testing with a set of LiON batteries that used to belong to a cordless strimmer, which fell apart from overuse. I've run it up and the battery doesn't really have enough life to power 4 motors, but is useful for testing. I've stuck some old NiMH units on a charge cycle to see if they have enough life for a bout or two. The only things I actually need to "buy" are a 2.4GHz radio set, as the old 40MHz stuff is against the rules these days, so I've ordered a Hobby King 4 channel set for £20 off ebay. Strangely yesterday Mentorn emailed a bunch of robot folk to

The weakness of machines

All of the robots I have built have failed in fights, and usually at the axles/wheels, it's like a running joke. So why should it be any different with this featherweight? Meathammer was designed back in 2005/06 when using 4 drill motors was a bit of a novelty... it was made more novel still by mounting the epicyclic gear cages directly to the chassis, which unfortunately sends all the drive shocks back through the gearbox. The original version ran for a number of fights at modelworld 2006? and even won some, especially the sumo, which favoured its very low profile. I've just rebuilt the gearboxes with all metal gears, and tested it, and it seems it should last for at least one fight… but as I put it in the car after testing, I noted one of the wheels had nearly fallen off. Mark that bolt for Lockthreading! All this got me thinking if I could make something less likely to lose a wheel, break a gearbox etc I have a huge pile of bits and bobs that were destined for heavie