Bouncing turns

[bob1million]

We just had our first practice with our bot running and when we try to turn it it bounces out of control. It is four wheel drive and we used the wheels that came with the kit.
Is there anyway to stop it from bouncing and make it turn smooth?

[dman9385]

Originally Posted by bob1million

We just had our first practice with our bot running and when we try to turn it it bounces out of control. It is four wheel drive and we used the wheels that came with the kit.
Is there anyway to stop it from bouncing and make it turn smooth?

I am currently working with 406 and we had the same problem. In order to fix that problem we found that replacing the front tires with some that have a smooth surface will give you a nice smooth turn.

[Kevin Watson]

Originally Posted by bob1million

We just had our first practice with our bot running and when we try to turn it it bounces out of control. It is four wheel drive and we used the wheels that came with the kit.
Is there anyway to stop it from bouncing and make it turn smooth?

Try increasing the tire pressure.

-Kevin

[Arefin Bari]

Originally Posted by Kevin Watson

Try increasing the tire pressure.

-Kevin

just like he pointed out.... get more pressure on your tire... about 35 psi.

[jacob_dilles]

there IS another option... shave down the wheels!! or mabye get some teflon and start wraping them...

[Kevin Karan]

Yea, we noticed this problem back in week 2 durring our first trial run, we fixed it by putting casters on pnumatic cylinders. On carpet we are always in caster mode but when we climb or we are on the platform we are on awd mode.

[Elgin Clock]

Originally Posted by jacob_dilles

there IS another option... shave down the wheels!! or mabye get some teflon and start wraping them...

You can't very well shave down pneumatic wheels now can you?

[Sachiel7]

Well, at the DC Scrimmage last Saturday, I saw quite alot of bots w/ this problem...
Luckily ours wasnt one...
But anyway, the 12" pneumatics wheels seem to be used ALOT this year. Mainly, I would assume to climb the platform from the side, which based on last weekends results, isnt going to work quite as well as people would hope...
We personally stick with our 8x2" wheels, spaced out 26" wide (roughly)
I'm not too sure how to eliminate the issue. If you're not planning on going up the platform, try to get some smaller wheels with a little less traction. Or, you could make 2 big omni wheels for the front or back 2 tires of your bot using a bunch of smaller omnis.
I would make sure your tire pressure is full though. That was an issue with a few of the 12" 4x4 bots...

[blindguyinanorg]

someone posted earlier that they painted the back wheels with poly somthing or another. the robot will rotate around the front wheels because the back ones slip.


also with the tire pressure deflate the front ones and inflate the back ones. you want it to rotate around one wheel set and slide the other.

we just stuck some casters on the back that come up when we are climbing the platform

[Elgin Clock]

Somoene actually suggested using a wax type substance like armor-all on the tires? Would that work, or be legal?

[blindguyinanorg]

Originally Posted by Elgin Clock

Somoene actually suggested using a wax type substance like armor-all on the tires? Would that work, or be legal?

yes, anything to reduce the friction

there is another post about this(by me) but it ended up in the pnuematics section sence i said pnuematic wheels HA!

http://www.chiefdelphi.com/forums/sh...ad.php?t=25061

[ChrisH]

The Schmoebots had this problem as well. They solved it by simply removing the tires on one end and running on the rims. There's a little bit of slip from the different diameters, but it doesn't seem to cause any problems.

[Greg Perkins]

Originally Posted by ChrisH

The Schmoebots had this problem as well. They solved it by simply removing the tires on one end and running on the rims. There's a little bit of slip from the different diameters, but it doesn't seem to cause any problems.

or make a wheel outa lexan or delrin

[Random Dude]

Originally Posted by Elgin Clock

Somoene actually suggested using a wax type substance like armor-all on the tires? Would that work, or be legal?

Hmm. Well, I would think wax could be a bad idea, since it could(would?) rub off easily onto the carpet, something which FIRST would not like.

However, what does work, is wrapping some sort of material around the tires...

[Collin Fultz]

we had this exact same problem last year. the cause was too much top weight and too much traction. we looked like we were convulsing while turning. we could never figure out how to stop it and just kind of lived with it. on the bright side...we never lost a pushing match. good luck!