I so want to fight it :D
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I so want to fight it :D
Damn, that's crap :shock:
Barely looks like solid steel at the point where's it's broken; looks more like some sort of cheap composite. Hope it didn't rob you of too much cash.
But before that happened it was looking strong. May only weigh 2kg but with the power behind it, that's enough. Best of luck getting a new one sorted.
PJ- Yeah solid material... pretty lame how it sheered like that.
Clive- you'll get your chance to get beaten like everyone else lol :rofl:
Jamie... yeah seemed ok... ill be speeding it up to 11000RPM instead of 7800rpm i think for version 2.... also think ill make the teeth slightly more serated for a better bite... just doing the cad now :)
looks like a shear that you would expect from a stress concentration on a very hard metal. The metal is probably the grade of tool steel you were after. Had their been a larger radius to the shaft it may not have broken although it's a good demonstration as to why the hardest material isn't always the best.
not a lot of load for 17mm tool steel... also its hard to machine a radius when your turnin a square bar round.
As we were saying it's pretty certain it's not a nice new peice of D2 that dave got sent as it should have been.
It almost looks very work hardened as if its a cheap tool steel thats been cut off the end of a used press tool or something thats done a few hundred thousand cycles lol. D2 is an excellent material - that beater isnt.
Maybe we're looking at this the wrong way, and actually PloughBots steel shell is just super awesome!
Dennis has done his bit on the gearbox's... hopefully ill have them in the next day or two, then i can make new output shafts for the main drive, and get them mounted in the robot... then it wont be as borring as it was at kidderminster.
http://i685.photobucket.com/albums/v...0-21143537.jpg
http://i685.photobucket.com/albums/v...0-21125305.jpg
http://i685.photobucket.com/albums/v...0-21102547.jpg
she lives!
http://www.youtube.com/watch?v=HGXTzZckRUo
looking really good Dave, whats the gear ratio on the speed 900's?
Thanks :) 9:1 80mm wheel
Like :D
Awesome Dave! Looks like it has some serious power.
Good shout on the Speed 900 - custom gearbox front.
Speed 900s - reliable as hell :D
*awaits Dave successfully burning out both Speed 900s in a matter of minutes*
Hahaha, wait until the magnet is in.....
lol i actually carnt remember the last event i went to without blowing something up before kidderminster.... give me chance jamie :P
Coming along very nicely mate.
Hit me up a message on Facebook when your next online fella.
Jas
Not done an update in a while..
been working on 540 recently... going to aim to get it finnished before the end of January....then ill make a start on finaly fixing 360 up... got it out today to have a look, was covered in dust and looking pretty sorry for itself....going to change the gearing to the disc and upgrade it to 10s lipo.
picture of how they both stand at the moment in the nude;
http://i685.photobucket.com/albums/v...s/8502101a.jpg
sorted 540s gears out yet?
Haha, you're right. 360 is looking really sorry for itself.
How's things on the beater front? Managed to sort out a new one or is it a work in progress?
calum- yeah i changed the bearings for needle rollers and a bigger shaft and it seems ok so far...made up a spare set too lol
Jamie- yeah its getting there, did the hard bit today, need to spend another hour on a lathe and it'll be done :) same design as the old one, but the shaft side of it should be a bit stronger....might change the brushless motor for a higher KV version... i want to hit over 10,000rpm with it :proud:
hi, great robots, where abouts in brum are you? im in four oaks?
Sutton coldfield mate.
cool 8)
got mini gimp of tom, fitted brushless, changed the drive escs and rx etc and re-wired it all today;
http://i685.photobucket.com/albums/v...s/f6f757b9.jpg
http://i685.photobucket.com/albums/v...s/61e73afd.jpg
got a few grams left for teeth on the disc, few more if i take the magnets out.
When I saw the original pic of Mini gimp I thought it had a metal base, but that was for the kilobot I presume.
Banebots can go down to 3g each with the heatshrink off, and there is a lot more weight to be lost in that wiring and taking heatshrink off the lipo. Just some advice so you can get some good teeth in the weight.
how can you loose weight in the wiring? all the cables are as short as possible....
didnt want to take off heatshrink as carbon fibre is a conductor :)
what did you do with the servo boards?
chucked em in a box...
okay, let me know if you want rid of them
Shell can still loose some weight, Drill or pocket wheels like i have in the gimp. Cut motor shafts down. Flip battery so lead is at other side and shorten that wire.
Stick some titanium teeth on it.
yeah i might drill wheels out etc, was going to cut lipo wire down but didnt want to solder a joint half way down lead... ill do all that when i know how much over i am when its got teeth on... need to put a little weld on shell to hold the top bit on properly- just glued atm
All the tiny pocketed holes on the top could be drilled. Still be way strong enough.
When you say magnets, what are you using them for?
The magnets were put there because when we was building the robot it was made for show to drive up walls and upside down etc. also it effectively gives the robot more weight in the arena and helps keep the robot stable when spinning and hitting other robots.
I have enough parts to build another dribble bot spinner. might build one to sell.
whats the beater made from?
hardox 500
looks well nice, good job
whats left to do?
get it in weight :P , going to cut a section out the top and replace with titanium... then take a few MM of the tips of the beater because it hits the floor quite a bit :P lol