04-02-2009 20:57

Seat Ninja

Re: pic: 612 Teaser

Hmm...interesting and inventive. That has to be some really flexible belt. The KOP stuff is fiberglass reinforced and i don't think it would bend like that without breaking the reinforcement.

04-02-2009 21:03

EricH

Re: pic: 612 Teaser

How much clearance do you have between the belt and the ground? Looks like about 1/8".

Is that a swerve drive or just castered? (Or not a drive part at all?)

04-02-2009 21:30

unclewaldo

Re: pic: 612 Teaser

Hope you have NOT grooved the slick wheel surface to accept the belt and pulley which the picture seems to suggest... or is this not a robot drive wheel assembly?

Hopefully there is clearance as Eric points out?

As I read the rules, the SURFACE of a driving/propulsion robot wheel may NOT be modified as this changes the coefficient of friction of that driven wheel.

04-02-2009 21:34

kevin.li.rit

Re: pic: 612 Teaser

Quote:

Originally Posted by unclewaldo Hope you have NOT grooved the slick wheel surface to accept the belt which the picture seems to suggest... or is this not a robot drive wheel assembly? Hopefully there is a pulley sprocket on the back side that appears to be white like the plastic wheel rim? As I read the rules, the SURFACE of a driving/propulsion robot wheel may NOT be modified as this changes the coefficient of friction of that driven wheel.

04-02-2009 21:35

nahstobor

Re: pic: 612 Teaser

We only have front wheel steering on our robot. There will be a lazy susan which attaches this piece to the frame. Then we have a second motor controlling the steering. We'll be posting our finished frame in a couple days which will explain more about how this piece fits in.

For the belts we are using Neoprene belts which are fiberglass enforced. They have been doing the job for us for the past 3 years.

04-02-2009 21:36

nahstobor

Re: pic: 612 Teaser

Yes there is a separate pulley attached to the wheel. Because of the size of the pulley we are nearing about an 1/8th of an inch off the floor .

05-02-2009 06:27

Jimmy Nichols

Re: pic: 612 Teaser

It looks like a loose wrap off of the CIM, you may want to tighten the belt a little more to prevent slippage.

05-02-2009 09:14

JesseK

Re: pic: 612 Teaser

I always look forward to seeing Chantilly's next belt drive design. Looks good guys! Don't forget the retaining clip on the outside of the pulley on the CIM shaft.

It looks like you guys are as far along as we are, and aren't doing the typical FRC drive train either. Will we get to see you at the DC scrimmage?

05-02-2009 10:59

nahstobor

Re: pic: 612 Teaser

We will be attending the DC scrimmage during the afternoon session.

05-02-2009 11:04

MrForbes

Re: pic: 612 Teaser

Quote:

Originally Posted by Jimmy Nichols It looks like a loose wrap off of the CIM, you may want to tighten the belt a little more to prevent slippage.

05-02-2009 11:07

spc295

Re: pic: 612 Teaser

wont the belt grinding on the pulley create a lot of electrical noise and mess with your wheel sensors?

05-02-2009 11:15

Lil' Lavery

Re: pic: 612 Teaser

Quote:

Originally Posted by spc295 wont the belt grinding on the pulley create a lot of electrical noise and mess with your wheel sensors?