pic: Team 980 Breakaway robot

[Chris is me]

Originally Posted by Ryan_Epperson

Food for thought...

http://forums.usfirst.org/showthread...ighlight=chain


I know the teams that I mentor saw it as no issue they were designing their robots as well... Looks like we are going to be ordering smaller gears and installing them on thursday!

Good luck!

Belt drive isn't metal so it doesn't break the rule cited above.

[Ryan_Epperson]

good to know...

I would think that Belts are going to have more traction than metal, but that's just me.

[Chris is me]

Originally Posted by Ryan_Epperson

good to know...

I would think that Belts are going to have more traction than metal, but that's just me.

They probably do (though less than roughtop). The rule doesn't limit traction, just metal as a traction aid (mainly due to carpet damage, etc).

[Ryan_Epperson]

Originally Posted by Chris is me

They probably do (though less than roughtop). The rule doesn't limit traction, just metal as a traction aid (mainly due to carpet damage, etc).

That's what it seemed like to me. The chain on the Robot only brushes the carpet and in the 20+ times that they floored it over the bump the wheels were the only thing that ended up being damaged, the carpet was perfectly fine. So this would leave me to want to think that they are on then... but we need to check it out on thursday on the practice field to be sure

[David Brinza]

Originally Posted by Ryan_Epperson

That's what it seemed like to me. The chain on the Robot only brushes the carpet and in the 20+ times that they floored it over the bump the wheels were the only thing that ended up being damaged, the carpet was perfectly fine. So this would leave me to want to think that they are on then... but we need to check it out on thursday on the practice field to be sure

The way <R08> reads,

ROBOT wheels, tracks, and other parts intended to provide traction on the carpet may be purchased or fabricated (“traction devices” include all parts of the ROBOT that are designed to transmit any propulsive and/or braking forces between the ROBOT and the FIELD). In no case will traction devices that damage the carpet or other playing surfaces be permitted. Traction devices shall not have surface features such as metal, sandpaper, hard plastic studs, cleats, or other attachments. <snip>

I doubt inspectors will allow a chain that contacts the field. Chains close enough to the circumference of the wheel as to contact the field on a bump will provide (however small) propulsive and/or braking forces to the robot. Chains are made of metal, hence they are prohibited as traction devices. I would also worry about lubricant in the chain transferring to the carpet, thus violating <R36>.

[Ryan_Epperson]

Originally Posted by David Brinza

The way <R08> reads,

ROBOT wheels, tracks, and other parts intended to provide traction on the carpet may be purchased or fabricated (“traction devices” include all parts of the ROBOT that are designed to transmit any propulsive and/or braking forces between the ROBOT and the FIELD). In no case will traction devices that damage the carpet or other playing surfaces be permitted. Traction devices shall not have surface features such as metal, sandpaper, hard plastic studs, cleats, or other attachments. <snip>

I doubt inspectors will allow a chain that contacts the field. Chains close enough to the circumference of the wheel as to contact the field on a bump will provide (however small) propulsive and/or braking forces to the robot. Chains are made of metal, hence they are prohibited as traction devices. I would also worry about lubricant in the chain transferring to the carpet, thus violating <R36>.

I agree. We are purchasing new gears as we speak and will be re-vamping the drive-terrain on thursday if it does in fact contact the carpet.

[Doug G]

We too tried the belt drive system this year and it initially tested out pretty well, but when we added weight and really pushed it hard, the belts stripped out fairly quick (not all were properly tensioned). Do not even try to run belts without proper tension!!!

[sdcantrell56]

we're running belts this year with 2 cims and 1 fp per side and have not had any problems with them at all. We of course have them tensioned but other than that set up has been super easy and theyre much cleaner than chain.