24-01-2009 23:34

Akash Rastogi

Re: pic: 816 as of 1-24-09

"Ur doing it backwerdz!!! O.O"

lol

Man that thing looks awesome. I love the simplicity in design. Very impressive that you guys got this out so quickly. hit me up if you need coding help.

Honestly, you guys are one of the few teams I can't wait to compete with this year. Make it an awesome season man. Way to rep the EWCP

P.S. This is a very nice belated birthday present. hehe

24-01-2009 23:39

smurfgirl

Re: pic: 816 as of 1-24-09

Neato! That looks like a solid design, and a good example of KISS. Its simplicity and color scheme make it aesthetically pleasing. All around awesome. I hope I'll be able to see it personally at some point. (:

25-01-2009 00:04

Danny McC

Re: pic: 816 as of 1-24-09

O you will. You will. On Einstein. Just you know throwing that out there. And yay for broken PVC pieces on the trailer.

25-01-2009 00:11

smurfgirl

Re: pic: 816 as of 1-24-09

That assumes I'm on Einstein again this year... which could happen, but I would be on the volunteer side this year. (I did sign up to volunteer at the Championship, but I have to make sure MIT can live without me for a few days first )

25-01-2009 00:13

R.C.

Re: pic: 816 as of 1-24-09

WOW dustin, you guys finished the CAD quick and the robot. Extremely cool looking, hope to see you at nationals.

25-01-2009 00:15

thefro526

Re: pic: 816 as of 1-24-09

I haven't touched the CAD Since I last showed you haha. I'm boycotting Inventor for a while.

25-01-2009 00:20

Chris Fultz

Re: pic: 816 as of 1-24-09

very cool.

can you describe how the functions work together, ball handling, etc

25-01-2009 00:27

thefro526

Re: pic: 816 as of 1-24-09

Sure,

The Front Roller Is A Banebot RS545 with a 20:1 Transmission that spins at about 600 rpm. This Sucks Balls into a hopper which is the blue area in the front.

The Black Roller at the bottom and the orange one in the middle are connected with a belt that acts as a conveyor system for the balls. This is powered by a fisher price motor with gearbox.

The Top Most Roller is powered by a Globe with about a 1:4 Ratio and it spins pretty quickly for being Globe Powered. This roller acts as a stop so that balls can be staged in the conveyor system or we can reverse it and it helps pop the balls out.

25-01-2009 00:38

Akash Rastogi

Re: pic: 816 as of 1-24-09

Might need to double take at the picture as a lot of the lexan backing is missing right now.

Just thought I'd add that in there...

25-01-2009 00:45

Danny McC

Re: pic: 816 as of 1-24-09

Your skill in pointing out the obvious has increased by one

25-01-2009 00:50

Akash Rastogi

Re: pic: 816 as of 1-24-09

Danny, just cuz you think you're cool doesn't mean its true.

25-01-2009 01:06

Michael Corsetto

Re: pic: 816 as of 1-24-09

Is the kinda "gut" area between the intake roller and conveyor belt system used for storage, or is it blocked off with lexan so the balls can't bunch up? How many balls can the system hold? How well does that front roller grab running at 600rpm? What sort of compression do you put on the balls for the front roller and conveyor system? Sorry about all the questions, looks like a pretty slick design, post video soon please

25-01-2009 01:38

dtengineering

Re: pic: 816 as of 1-24-09

I don't know if you've already got something planned, but have you thought about protecting the intake roller?

On impacting the corner of another robot, the contact may not be bumper-to-bumper, but rather the edge of the other robot (usually reinforced or supported) to the centre of your roller. Perhaps the roller is designed to take this kind of hit, but it would be a shame to see a nice looking robot like that out of commission due to a weak point.

Assuming the roller IS designed for a full-on impact, if the relative velocity of the two robots is at an angle, can the roller mounts take a sideways impact force?

Jason

25-01-2009 02:20

jason701802

Re: pic: 816 as of 1-24-09

I've never seen belting like that, what is it?

25-01-2009 02:45

Akash Rastogi

Re: pic: 816 as of 1-24-09

Its just wheel tread or conveyor belting. Cut into strips.

25-01-2009 02:56

Tristan Lall

Re: pic: 816 as of 1-24-09

It's a segmented V-belt. It's made from some sort of fabric laminate, and composed of individual links. You twist the tab 90° and insert it into the slot on the next link; then untwist. They lock together under tension.

I believe that Small Parts sells it...this ought to be it. (188 used it for a hybrid wheel-tread thing on the 1999 drivetrain.)

25-01-2009 03:00

Akash Rastogi

Re: pic: 816 as of 1-24-09

Really now? Doesn't look like anything more than wheel tread...

Huh. Never seen that before then...

25-01-2009 13:00

thefro526

Re: pic: 816 as of 1-24-09

Most of the front open area is used as a hopper of sorts some of it will be used for electronics mounting. If you look closely you can see 2 pieces of angle just kinda sitting there and thats where our electronics shelf mounts to. Theoretical capacity is between 15-20 balls depending on how they all settle in the system. The front roller grabs very well and can handle 2 balls at a time and both the conveyor System and front roller compress the ball about 1/2" give or take a bit depending on what you say a ball's diameter is (I say it's 9").

In theory the front roller should never be hit. It's about 8.5 inches off the ground at it's lowest point which is out of the bumper zone. If it did hit the structure of another robot I hope it'll break and then we just have to replace a piece of pvc. On Monday I'll look into making a guard for it so that it would be metal to robot contact before robot to roller.

Thats the exact belt I think. We've had it for years and I believe we got it from the HVAC Teacher at my school because they use it for belting on compressors.

25-01-2009 13:33

Danny McC

Re: pic: 816 as of 1-24-09

Nahhhh Kramers dad gave it to us. I remember he brought it in and I was like WTH is that?

25-01-2009 18:36

Akash Rastogi

Re: pic: 816 as of 1-24-09

Close up pic please.

25-01-2009 21:08

thefro526

Re: pic: 816 as of 1-24-09

Of the belting? I'll take one tomorrow.

26-01-2009 00:55

fordchrist675

Re: pic: 816 as of 1-24-09

The bot looks really killer. Out team is doing something similar.

I really like the design hope you do well

26-01-2009 22:03

thefro526

Re: pic: 816 as of 1-24-09

As It sits tonight....



Belting.....

27-01-2009 09:28

Greg Peshek

Re: pic: 816 as of 1-24-09

It looks like this V-Belt belting from McMaster: 6173K41. Not sure if that's the right width, or if that's the right stuff, but it looked familiar when I saw that picture and I remembered seeing it when looking at belts.

It may or may not be it for people looking for the same stuff.

-Greg P.

27-01-2009 12:19

Elgin Clock

Re: pic: 816 as of 1-24-09

Dan & Dustin, where are you guys competing this year?

Edit: Never mind, TBA says Philly again & NJ? Too bad you won't be in NYC with us.

Looks like another awesome bot by 816 this year after last year's cool bot as well!

27-01-2009 12:50

pgaston

Re: pic: 816 as of 1-24-09

Another request - that belting looks neat - what is it? where'd you get it?

27-01-2009 17:54

thefro526

Re: pic: 816 as of 1-24-09

We'll Be competing in Jersey, Philly and The Championship. It sucks that we won't get another opportunity to kick some butt with you guys. I might have to make the trip up to NYC to see you guys in action though.

We got it donated. There's a few links to it in the above posts.


In Robot News!

During School today I rigged the motors together to see how everything's going to work and it looks good. Our Capacity should exceed 20 and we can score 3 at at time with about a 90% success rate. It takes about 3-4 Seconds to offload 10 balls.

Might Have Video Tomorrow or Thursday But I can't promise anything until Friday-Saturday.

27-01-2009 20:44

5n1p3r

Re: pic: 816 as of 1-24-09

Woa how many belts are there?

27-01-2009 23:10

thefro526

Re: pic: 816 as of 1-24-09

Only 7 Actual Belts. But we have a bunch of little belt wrapped around the rollers to make them grippier.