UK Kilobots - 1.362kg (3 lbs) Combat Robots

[harry hills]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

yep

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Video of a spin test of Spinza:

http://www.youtube.com/watch?v=7iE6VN8MhZU

And a couple of photos of it assembled:



And the blade assembly:

[RogueTwoRobots]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Looking good guys, nothing like spinning up a weapon with a brushless motor to scare the brown stuff out of you!

Out of interest, what brushless motor are you using? There are so many available that could work in a BW that I don't really know what to go for, so a benchmark from another robot would be handy
Also, you still having problems with the torque of the MFA motors struggling to turn Spinza? I've ordered some of the 1000rpm gearmotors from eBay to replace the MFA motors in Paws* so it'll be interesting to see how they compare and whether they're powerful enough to be a good alternative for your drives (plus they're cheaper than the MFAs, just take a bit longer to arrive)

*I'm not changing mine due to performance, they're just easier to mount with the chassis design I have in mind

[Kenny]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Looks cool!!, how big is the robot??? looks twise the size of 180

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

@Jamie:
Thanks!
I never used brushless or Li-Po before, let alone both together! So was a rather scary moment. Currently on a 2.7:1 reduction and it doesn't spin all that freely (watch how short the spin down is) so I think I can get a little more out of it.
The motor is this:
http://robotbirds.com/catalog/product_i ... ts_id=4527

It's the most powerful they had in stock for that price and size.

The MFA's aren't great. I solved the problem a little by adjusting a mixing quirk of the Sabertooth, but it still struggles and I have to keep the electrical tape on the tyres. I think the odd wheel placement and fat tyres are the main problem, since straight line speed is pretty good, not as nippy as I'd liked though.
Let me know what the gear motors are like, if they're more powerful then I may look into changing.

@Kenny:
Cheers!
Its 520mm at the widest point and the blade is 320mm. Having not seen anyone else BW in reality I dunno how that stacks up.
It's right on the weight limit, and I think the last few nuts and bolts are going to tip me over.

Any news on the arena?

[mattsdragons]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

im thinking of using one of these for a BW FBS but im not too sure how i could do it

[Kenny]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

[quote=@Kenny:
Cheers!
Its 520mm at the widest point and the blade is 320mm. Having not seen anyone else BW in reality I dunno how that stacks up.
It's right on the weight limit, and I think the last few nuts and bolts are going to tip me over.

Any news on the arena?[/quote]

180 is only 230mm long inc the disc and is only 40mm tall, how tall off the ground is the blade?? also is they armour covering the parts?

the arena is in storage until me or tom have the time to finish it, we need to get the polycarb for it but considering the polycarb will be around 800-900 pounds its not for abit, also the arena isn't being built to put on shows its only for roboteers to have ago at building and destroying stuff in a safe environment and isn't being done for profit

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Spinza is 100mm tall and the blade sits about 10mm off the ground (its upside down in the tests, but runs in inverted).

Yeh there's a HDPE cover that sits over the top/bottom as armour.

the arena is in storage until me or tom have the time to finish it, we need to get the polycarb for it but considering the polycarb will be around 800-900 pounds its not for abit,

Be-jesus! That's a fair emount....

also the arena isn't being built to put on shows its only for roboteers to have ago at building and destroying stuff in a safe environment and isn't being done for profit

Sounds perfect. Will it be brought to events then?

[ewan]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Looks good, nice and original. True about the hugeness of it though! =p

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Haha, we seem to make a habit of making our robots too large.... I may have the shave some weight off somewhere, I think once all the nuts and bolts are in place it'll be 100g over.

How much does the disk on 180 weigh?

[Kenny]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

Yes it will be brought to events when its done,

disc on 180 weighs 650g and the chassis with everything also weighs 650g

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

650g!

My motors, esc's and battery weigh more than that! How on earth did you make a running robot with chassis and wiring for 650g!

[ewan]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

What's your chassis made of? Might want to use plastics for that size. Also the MFA's are pretty heavy if I remember correctly?

[mattsdragons]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

i know its a rule to not have a weapon but ive seen that you need to have the intent for damage so what about using those motors that PJ is using for his spinner for a full body hammer? how would that go down?

[PJ-27]

Re: UK Kilobots - 1.362kg (3 lbs) Combat Robots

My chassis is 1.9mm Ti, grade 4. Weighs around 250g I don't think I could do that any lighter given the shape and size.

The motors are 80g each which doesn't sound like much, but could do with being more powerful.

@Matt the Brushless I'm using has an impressive RPM but not much Torque so I don't think it would fair well for drive, plus bi-directional brushless ESC's are expensive.