21-10-2008 10:07

RMS11

Re: pic: Team 190's new robot

haha, like the top. How fast does it go?

21-10-2008 10:45

Nuttyman54

Re: pic: Team 190's new robot

top speed is around 14-15fps. Not blisteringly fast, but good enough to get 9-10 laps a match

21-10-2008 10:47

Kyle Love

Re: pic: Team 190's new robot

Darn blue shells...

21-10-2008 11:01

mtaman02

Re: pic: Team 190's new robot

Hmm,

It looks alot smaller then 102's Orion... I wonder which of the 2 can do my laps


I'd like to see those 2 go at it for 2:20 .

21-10-2008 12:42

zachjo

Re: pic: Team 190's new robot

how much does that? weigh? dimensions?

21-10-2008 13:02

Nuttyman54

Re: pic: Team 190's new robot

Robot Specs:

Bare weight: 25 lbs

Operational weight (With battery and bumpers): 39 lbs

Dimensions (without bumpers): 14" x 22"

Drivetrain: RWD, 2 8" skyway wheels with roughtop, direct drive from toughboxes, 1 CIM per side. Front wheels are 5" custom omnis

Top Speed: 15fps

21-10-2008 17:39

gorrilla

Re: pic: Team 190's new robot

oh man mario kart brings back some memories


u should have put a yoshi doll on it

21-10-2008 18:39

Athleticgirl389

Re: pic: Team 190's new robot

Orion is 13x16

And I'd love to see those 2 bots go at it... gonna turn Orion into Yoshi haha

21-10-2008 20:46

Dave Morris

Re: pic: Team 190's new robot

Team 2016 would join in with 11 laps both at Chesapeak and in Atlanta. Came in second behind Orion at Centenial Park too........

22-10-2008 10:24

Kingofl337

Re: pic: Team 190's new robot

I just purchased an old N64 and Mario Cart 64 just about two weeks earlier. I almost fell over when I saw that at Bash. Considering how well it did, I would say it was true to form.

Oh, and you guys should install 2 more CIMs for River Rage.

22-10-2008 11:14

Joe Ross

Re: pic: Team 190's new robot

What happens when it hits the #1 seed?

22-10-2008 17:56

Francis-134

Re: pic: Team 190's new robot

We were thinking about adding two more CIM's, but right now we are basically traction limited as far as acceleration is concerned. Also, the gearing for the Toughbox makes is such that an extra CIM per side will only improve our acceleration slightly, and our top speed even less.

Since there were no seeds at Bash, we will have to see what happens at River Rage .

22-10-2008 18:03

gorrilla

Re: pic: Team 190's new robot

what do you mean skyway wheel with roughtop did you remove the grey rubber stuff and put tread on it?

22-10-2008 19:35

Francis-134

Re: pic: Team 190's new robot

Sort of. We added added a high-traction material to the edge of the wheel. Because there's practically no weight on the rear wheels and that the Skyway wheels have a very low coefficient of friction, we had some huge traction issues. While it was cool to have the robot do donuts and drifts all the time, it made it almost impossible to turn effectively.

To add the tread, we practiced with the robot until there was a flat edge on the top of the wheel (if you are doing this at home, I would do this with a lathe). We then drilled an 1/8 inch pilot hole through the tread and the wheel, then fastened it with a drywall screw into the wheel's rim. If you want to do this, insert screws on alternate sides of the wheel at about 30 degrees apart.

22-10-2008 19:42

gorrilla

Re: pic: Team 190's new robot

oh so you left the gray stuff on there and screwed the tread to the flat spot ok

how long did it take?


and is the rubber removable if you could just remove it all and get to the plastic rim you could rivet the tread to that right?

22-10-2008 19:56

Francis-134

Re: pic: Team 190's new robot

It took us about 1/2 hour to cut the tread and attach it to the wheels. If you have the tools or time, you certainly could remove the gray tread from the wheel before attaching the traction material. I would chuck it in a lathe and cut it away.

22-10-2008 20:13

EricH

Re: pic: Team 190's new robot

Back when 330 put tread on Skyways, we'd use a belt sander. Put the wheel on an axle (with bearings), then hold it at an angle to the sander's travel until it was the desired thickness/flatness. After a certain point, you'll hit black in spots--stop there, it's the plastic.

22-10-2008 20:19

gorrilla

Re: pic: Team 190's new robot

oh that works cause we dont have a lathe

so then will the ifi tread work or do i have to get a special tread

22-10-2008 20:21

EricH

Re: pic: Team 190's new robot

IFI should work. You could also get some conveyor belting from McMaster (roughtop, wedgetop, or nitrile).

22-10-2008 20:23

gorrilla

Re: pic: Team 190's new robot

awsome now i have something to do for a while and to clean up our wheels bin


and does anyone know why the andymark wheel is flat but the skyway is more rounded

22-10-2008 23:50

Francis-134

Re: pic: Team 190's new robot

The AM wheels are designed for maximum traction, while the Skyway wheels are designed for wheelchairs which need the ability to turn easily and provide stability in any sort of tipping situation.

Before anyone says it, I understand that surface area is not factored into traction, but in a real-world, the non-ideal scenario, the deformation of the carpet and wheel, as well as the peaks and valleys of the carpet make surface area very important for traction. Similarly, a wheel with a larger surface area will have a higher coefficient of friction than a wheel with a smaller surface area (assuming they are the same material)