In Need of Banebot Wheels

[Karthik]

Originally Posted by sportzkrazzy

The polyurethane material is definitely the way to go. We tested pretty much everything out there and that was the most durable, highest traction materiel we could find for manipulating both totes and rcs. The trick is keeping them clean. Wiping them down in between in match does the trick. The best thing about it is that you can get for any much any size intake roller you need maxing out at 4 inches. We just stretched it over a 4 inch andymark performance wheel because that's what we had laying around at the shop. It required no adhesives just relied on the friction between the materiel and the hub to hold it and it worked great. The only thing we did was machine it down drastically to save weight. 179 Used them as well at IRI and they 3d printed plastic hubs for them. Originally they tried to make them out of abs but the hubs where not holding up do to the loads and impacts however after they switched to pla they held up great. Maybe someone from 179 can provide a little more incite on printing methods ie infill, wall thickness,and print direction.

We used similar material on our shooter wheels in 2014. However we used strips instead of the tube. For hubs, we just used standard VEXpro 4" traction wheels, that way we could easily integrate them into our robot using the Versa hubs and hex shaft, without having to make any custom parts.

[llamadon]

Originally Posted by Karthik

We used similar material on our shooter wheels in 2014. However we used strips instead of the tube. For hubs, we just used standard VEXpro 4" traction wheels, that way we could easily integrate them into our robot using the Versa hubs and hex shaft, without having to make any custom parts.

We had thought about using the adhesive backed strips of the poly-urethane from McMaster that has been mentioned in this thread. Is this what 1114 used on their shooter wheels? Or were the strips attached by other methods? Such as rivets or bolts?

[Karthik]

Originally Posted by llamadon

We had thought about using the adhesive backed strips of the poly-urethane from McMaster that has been mentioned in this thread. Is this what 1114 used on their shooter wheels? Or were the strips attached by other methods? Such as rivets or bolts?

We did not use the adhesive backed versions; we riveted the material on instead.

[sportzkrazzy]

Originally Posted by Karthik

We did not use the adhesive backed versions; we riveted the material on instead.

We tried the adhesive backed versions on manipulators in the past but even after giving it plenty of time to cure it did not want to stay on while under load. We tried using a couple of fastening methods as well but it would usually end up tearing out when under load. This was using strips that where 1 inch wide and with a thickness of 3/8ths of an inch. How wide were your strips and how did you fasten them? How often? Any issues with it tearing out?

[AdamHeard]

Originally Posted by Karthik

We did not use the adhesive backed versions; we riveted the material on instead.

About what rpm were you spinning at?

[Kevin Leonard]

5254 used colsons for their collectors the entire year, and with the modifications made for IRI copying 1114's collector geometry, they were extremely effective at intaking totes at near any angle.

I'm a firm believer that most of the time the small improvements you make in material choice to solve problems might be better solved much of the time by a geometry change. Incrementally improving a middling design can be good, but often scrapping the middling design and taking a different approach can often be more effective.

[sportzkrazzy]

Originally Posted by Kevin Leonard

5254 used colsons for their collectors the entire year, and with the modifications made for IRI copying 1114's collector geometry, they were extremely effective at intaking totes at near any angle.

I'm a firm believer that most of the time the small improvements you make in material choice to solve problems might be better solved much of the time by a geometry change. Incrementally improving a middling design can be good, but often scrapping the middling design and taking a different approach can often be more effective.

1592 completely agrees. But material choices is the next thing down the line on a list of things that can improve the functionality and use life of subsystems on your robot.

[mlantry]

Originally Posted by Karthik

We did not use the adhesive backed versions; we riveted the material on instead.

Any chance you have the part number of the specific type of polyurethane strip you used.

[Knufire]

Originally Posted by mlantry

Any chance you have the part number of the specific type of polyurethane strip you used.

I believe it's on McMaster as Soborothane (or I'm getting confused with a different part of an 1114 robot)

[Karthik]

Originally Posted by mlantry

Any chance you have the part number of the specific type of polyurethane strip you used.

I do! P/N: 8834K511

http://www.mcmaster.com/#catalog/121/3586/=ya56jq