Plactions treads and rubbing alchohol

[lemiant]

I'm looking for some ways to add a little bit more traction to our robot on the bridge. We are currently using plaction wheels with rough top tread. I have ordered some wedge-top tread for use at worlds, because I think it might be stickier. Does anyone have experience comparing the two treads on polycarb. Also, in the past we have used rubbing alchohol on the treads to increase traction. Will that degrade the tread?

Thanks

- Alex

Overall, roughtop treads have better traction on carpet than wedgetop, but teams have found that wedgetop has better traction than roughtop on surfaces such as polycarb.

Please note that while I haven't thoroughly tested this, roughtop worked beautifully for us on the bridge at both regionals we went to, and we balanced the same, sometimes better, than the wedgetop tread users, so I think the difference is negligible.

Also note that wedgetop tread needs to be replaced much more often than roughtop tread.

I have no idea about the rubbing alcohol thing, but honestly the two treads are grippy enough. If you really want more grip, try blue nitrile tread. It can be found at McMaster. One of the grippiest things out there, and can go through seasons without loosing its effect.

[IndySam]

What size wheels are you using? If they are 6" just use the KOP wheels, they are great on the bridge and are a nice cheep solution.

[jyh947]

Originally Posted by IndySam

What size wheels are you using? If they are 6" just use the KOP wheels, they are great on the bridge and are a nice cheep solution.

Although our competition robot uses wedgetop treads, I second the 2012 KOP wheels. They have very high traction.

[Ether]

Originally Posted by SuperNerd256

HDPE (what's on the bridge)

Last I checked it was polycarbonate.

Have they changed it?

HDPE is much more slippery than polycarb.

Originally Posted by Ether

Last I checked it was polycarbonate.

Have they changed it?

HDPE is much more slippery than polycarb.

I may be wrong, but I remember hearing about HDPE being on the bridge.

[Andrew Schreiber]

Originally Posted by SuperNerd256

I may be wrong, but I remember hearing about HDPE being on the bridge.

I remember hearing that too but it is polycarb on the competition bridges.

[Gregor]

Originally Posted by SuperNerd256

If you really want more grip, try blue nitrile tread. It can be found at McMaster. One of the grippiest things out there, and can go through seasons without loosing its effect.

Can you link this? My abysmal searching skills have come up empty.

[MichaelBick]

Originally Posted by Gregor01

Can you link this? My abysmal searching skills have come up empty.

http://www.mcmaster.com/#rough-top-belts/=h7j13c

It's the abrasion resistant nitrile.

[lemiant]

Originally Posted by IndySam

What size wheels are you using? If they are 6" just use the KOP wheels, they are great on the bridge and are a nice cheep solution.

4" Plaction Wheels.

[Joe Ross]

The colored part, the "bridge deck" is HDPE. On top of that is clear polycarbonate, the "bridge surface".

[Hawiian Cadder]

If you want to add grip I would try to remove the effect of the molding draft from the plasticons. Bowing the tread out so that the MIDDLE of the wheel rather than the outer edges has the largest diameter will greatly increase grip.

[Peter Matteson]

Do some research on the materials. There is a very specific reason the the Buna-N-Rubber, Nitrile and Natural rubber most teams use does not work as well on the bridge polycarb.

[Anupam Goli]

For the teams that have used the Blue Nitrile tread, how do you cut the tread down to a width that's manageable? I see 3" ad the minimum width, and I'm pretty sure 3" will be too much for manageable turning.

Originally Posted by Wing

For the teams that have used the Blue Nitrile tread, how do you cut the tread down to a width that's manageable? I see 3" ad the minimum width, and I'm pretty sure 3" will be too much for manageable turning.

Scissors, a knife, sometimes a saw blade....just about anything cuts it. Just find the width you want, measure (twice), mark the area, and cut.