Skipdiving Robotics

[daveimi]

lol don't worry I have a "dave second law of beetle spinner impacts" in that I don't think the energy transferred is actually that bad. I mean this in that although the mechanical calculations show a daft amount of energy upon contact with a disk or drum, the robot being hit isn't a fixed target. I mean this in that if you screwed 5mm plated steel to a wall and drove 720 into it it would put a nice big gouge in it. But then if you mount the same plate on another robot, a lot of the energy goes into throwing away the other robot. When you watch the beetle spinner fights there is clearly so much energy there, but upon contact with 1kg not being that planted the result ends up in glancing blows. The second law of beetle spinner impacts makes me feel a lot better about my ally angle When I bring my robot home in a binbag on the 1st March I will no doubt change my tune

[suvv]

im preparing for my first bot to explode on impact with any of the spinners

[suvv]

and also isnt the rule with spinners that they do as much damage to themselfs as to the target

[mrsam]

The forces they have to cope with are the same yes, obviously the opposing robot is being hit with something so will take more superficial damage. The first version of Lynx basically destroyed itself at half speed because it couldn't handle the forces it took during an impact, however it also had enough energy at half speed to get through g5 Ti.

[daveimi]

Struth I'm back to cacking myself again

[harry hills]

"Good point, looks like we do not stock the 4mm version which we will rectify on our next delivery which is likely to be 4 weeks time. Apologies for the confusion."

^about adaptors to save cluttering up the ranglebox thread

[daveimi]

Yeah that was the response I got lol. Hence pecking about fingertech adapters. The fingertech setups are so much nicer than the pololu stuff it's just a case of having the time to wait for spares. If Ellis could stock it and also some featherweight casters with nuts melted in I'd be his biggest customer lol. Also drill mounts and all that kind of stuff. Someone also needs to start selling removable links premade as well, I'd buy a ton of them.

[daveimi]

Well realised everyone was right and there was no way on gods earth I was going to get robot in weight. I decided to trim it right down and now the finished body is 800g. Also got motors and wheels etc. together so that was good. I have a scoop thing to go on the front. Am massively daunted by the other beetles and ummed and arred about calling it a day at the weekend. My girlfriend persuaded me to at least finish the body and running gear. She's right when she says it doesn't matter if you're amazing at something, if you're having a laugh keep having a go. So...to this end I've put a couple of pictures up. Tomorrow is going to be a case of cutting slots top and bottom for the wheels to poke through and putting the front wedgyprongthing on. Then in the afternoon put electrics in and cable it all.

[mrsam]

Your girlfriend is right you don't need to build a super incredible machine to have fun, it actually looks quite strong so you might be surprised. Cover the sides with something to protect to Alu angle and you'll be fine, some hdpe would absorb the hits from spinners well enough, got some 3 or 6mm stuff if you want me to bring it to the event.

[suvv]

looks good mate im hopefully gona get started on mine soon now that i have all the major components and my plastic has arrived look forward to meeting you in the arena

[daveimi]

Thank you for the offer of the hdpe but should be ok, if I get stuck will let you know And thanks for the nice comment suvv look forward to seeing yours too. Found some more ally bar in a bin at work so made a prongy thing. And used a cordless drill to make wheel holes top and bottom. It looks like a load of rubbish.

[suvv]

i made my first prototype out of cardbord mate and it looked like a 3 yr olds attempt at a bath or something no shame in something starting out looking sketchy with the reliability issues of past beetles i have been told about you stand as much a chance of winning as anyone else just remember that the first uk robot wars champ was a load of old road signs and an electric wheel chair

[daveimi]

Nearly there! Car is full of diesel and tools are ready to go. Batteries charged and just the link to go in

[mrsam]

Looking good, Lynx is almost done too just needs it's weapon bar , hopefully see you in the arena.

[daveimi]

You can leave the bar off if you like