New Robots

bitternboy · Post by **bitternboy** » Mon Feb 22, 2010 5:28 pm

Geared motors. 50:1 polulu HP

Team Terror · Post by **Team Terror** » Tue Feb 23, 2010 3:57 pm

What voltage are you running them on?
I run 4 50:1 HP Pololu motors on 3 cells(11.1/12.6 fully charged), and they are incredibly fast and powerful, even with small wheels

bitternboy · Post by **bitternboy** » Tue Feb 23, 2010 4:47 pm

I'm only running them on 2 cells at present. I'll probably uses 3 in the future though.

peterwaller · Post by **peterwaller** » Thu Mar 04, 2010 7:57 pm

After several unsuccessful attempts at a full body spinner I have opted for the slightly easier bar spinner where the blades are bent down so they are low enough to be effective. Here it is wedged up on a couple of bits of angle to hold it level for the photos. It success or failure will probably be down to how well I can balance the blade.
http://i109.photobucket.com/albums/n66/ ... MG0957.jpg
http://i109.photobucket.com/albums/n66/ ... MG0959.jpg
Still have to add some blades and some electronics.

alasdair · Post by **alasdair** » Thu Mar 04, 2010 8:01 pm

That looks really nice, and scary!
Ypuve done it again, peter!

One thing, i am using the same Brushless motors in my new spinner, TruANT and the robot looks a bit small in comparison to the motrs.

knightrous · Post by **knightrous** » Fri Mar 05, 2010 6:53 am

peterwaller wrote:After several unsuccessful attempts at a full body spinner I have opted for the slightly easier bar spinner where the blades are bent down so they are low enough to be effective.

Bend down over head bars have a nasty tendancy to cause the robot to flip itself on impact. http://media.madoverlord.com/Movies/tsn/E-2X4-YU812.mov is a good example

I use to have a featherweight with an angled bar spinner, use to flip as well (http://www.youtube.com/watch?v=51XDFJP47Go 2:15 tells the tale

)

peterwaller · Post by **peterwaller** » Fri Mar 05, 2010 8:24 am

Yes I know what you mean I have had the same troubles with FBS except when they flip they are effectively a fast spinning wheel which leaves the arena very quickly.

Cavecrusher · Post by **Cavecrusher** » Fri Mar 05, 2010 12:27 pm

peterwaller wrote:After several unsuccessful attempts at a full body spinner I have opted for the slightly easier bar spinner where the blades are bent down so they are low enough to be effective. Here it is wedged up on a couple of bits of angle to hold it level for the photos. It success or failure will probably be down to how well I can balance the blade.
http://i109.photobucket.com/albums/n66/ ... MG0957.jpg
http://i109.photobucket.com/albums/n66/ ... MG0959.jpg
Still have to add some blades and some electronics.

i say it won't, you remember the last incarnation of MBY? Just because the point of contact was below the center of rotating mass MBY would flip over when hit, very annoying.

One other problem is that a bar spinner doesn't have the nice gyro effect of a big disk, so not so stable.

alasdair · Post by **alasdair** » Sat Mar 06, 2010 9:08 am

He looks really great!

Are all four wheels powered?

peterwaller · Post by **peterwaller** » Sat Mar 06, 2010 5:34 pm

Just machined a new polycarb arm which is lighter so I can put more weight at the ends.
http://i109.photobucket.com/albums/n66/ ... MG0960.jpg
Might prove to be too flexible.