03-03-2008 01:15

AdamHeard

Re: pic: Team 1114 - Simbot SS

It was amazing at Midwest. So, I gotta ask....

What powers the launcher?

What powers drive? What speed? Is the robot underweight?

Also, can you explain the teaser?

03-03-2008 01:19

dtengineering

Re: pic: Team 1114 - Simbot SS

Those who haven't seen the video of this thing should check it out on the blue alliance.

1114 has done it again. Look out Einstein, here they come.

Jason

03-03-2008 01:20

Guy Davidson

Re: pic: Team 1114 - Simbot SS

As I commented in another thread, the best way I could ever see to describe your amazingly simple robot came to my from the quote bar:

"... simple things can amaze me." - Andy Baker

Since I'm a programmer, I'd love to add to Adam's questions (please? ):

How much feedback to you have to control the drive train? The arm/grabebr mechanism?

How do you control the Hybrid mode? What commands does the Robo-coach (if used, but I assume you do) give?

Thanks, and congratulations on building an incredible robot. I hope I / we can go to Atlanta this year, if just to stare at your (and others, of coutse) robot(s).

03-03-2008 01:23

=Martin=Taylor=

Re: pic: Team 1114 - Simbot SS

hmmm... It resembles 217 in no way watsoever.... I guess the rumors were rumors...

All the same. That things amazing.

03-03-2008 01:39

Martijn

Re: pic: Team 1114 - Simbot SS

wow.. so simple, yet so effective. just watched the finals on the blue alliance, and all i can say is wow..

03-03-2008 01:41

Eugene Fang

Re: pic: Team 1114 - Simbot SS

can anyone enlighten me on how their shooter works? all i can tell from the pics is that its very thin and pokey.

I watched some videos, and the pokey thing goes out very fast, and then retracts quite slowly. im assuming thats a characteristic exhibited by some sort of windup/retraction system with some sort of tensioning/launching system (if it were pure pneumatics, for example, it should have retracted just as fast)

03-03-2008 01:44

Arefin Bari

Re: pic: Team 1114 - Simbot SS

Me: Karthik, can I see the robot?
Karthik: NO.

Like others have asked, please elaborate on your shooting mechanism. If you can share close pictures of your mechanism, it would be much appreciated.

03-03-2008 02:19

waialua359

Re: pic: Team 1114 - Simbot SS

The names says it all. Simbot-"simple"
Its an understatement to say that any team probably could have built this thing/similar design had they seen this from day 1 of build season.
Their design and game approach is something worth studying. Write a book! It will make you folks rich......

03-03-2008 02:25

Eugene Fang

Re: pic: Team 1114 - Simbot SS

No Delete Option.

03-03-2008 03:19

Joe Ross

Re: pic: Team 1114 - Simbot SS

Not quite a full book, but you can read about them in http://www.amazon.com/FIRST-Robots-B...33924&sr= 8-2 and http://www.amazon.com/FIRST-Robots-H...990521-5305468

03-03-2008 04:12

waialua359

Re: pic: Team 1114 - Simbot SS

Joe,
Thanks for the amazon link. I just preordered a couple of books and its Much cheaper.

-Glenn

03-03-2008 09:09

AndyB

Re: pic: Team 1114 - Simbot SS

The shooter is wound up using surgical tubing. When the arm is pulled back, the surgical tubing is tensioned. If I remember right, I think they used a dog gear as a firing mechanism... but that may be someone else.

Worked very effectively though and their drivers were about as good as it gets).

03-03-2008 09:14

Brandon Holley

Re: pic: Team 1114 - Simbot SS

Karthik,

I would just like to say great job to you and your team. This robot definitely wow-ed me right off the bat. You guys really are a top notch team and I have the upmost respect for you guys. Good luck in the rest of your regionals, and i'll be pulling for you guys at championships to go all the way, you definitely deserve it.

Brando

03-03-2008 09:51

fredliu168

Re: pic: Team 1114 - Simbot SS

Is this the year simbots win Einstein?

I wouldn't be surprised.

03-03-2008 10:00

Tapoore

Re: pic: Team 1114 - Simbot SS

Me neither.

This is definitely my "why didn't I think of that" robot for this year.

Amazing.

03-03-2008 13:29

Dan Richardson

Re: pic: Team 1114 - Simbot SS

Watching this thing on the webcast two expressions came to mind.

"GENIOUS!"

and

"Wah wah wee wah"
-Borat ( RIP )

03-03-2008 16:25

nuggetsyl

Re: pic: Team 1114 - Simbot SS

How many over per round did they do?

03-03-2008 16:47

Jonathan Norris

Re: pic: Team 1114 - Simbot SS

I think I've seen them do 7 in one match (actually this match), my guess is that their average per match is closer to 4-5.

03-03-2008 20:51

Michael DiRamio

Re: pic: Team 1114 - Simbot SS

We have two encoders (one on each side, 64 ticks per revolution) and a gyro for feedback on the drive system and there is a 10-turn pot mounted on the arm. The information from the base is fed into a positional system we use to keep track of our location on the field and react appropriately.

The hybrid modes focus mainly on informing the robot what "lane" to be in on the straight-aways (for now!).

03-03-2008 21:50

Hunter

Re: pic: Team 1114 - Simbot SS

The drive is powered by a 4 CIMs in two AM Gen 1 shifters, with 4"x1" IFI wheels with wedgetop. High gear is approximately 15 fps and low is around 6 fps. The robot is still around 5.5 lbs under weight.

The launcher is powered outwards by several pieces of surgical tubing that can be seen going up the back side of the mast in the picture. The surgical tubing pulls the 3/4" anodized aluminum rod out through linear bearings when the winch is released. The winch is powered by a FP motor in a Dewalt with the backdrive pins left in to keep it retracted. The pulley with the cable on it is engaged and released with a dog similar to the AM shifter. The launcher is fixed to the mast so the angle is always the same and The claw is rotated with the other FP motor with the stock gearbox after a few modifications making it easy to interface with. The roller itself is run off the RS-550 motor and a gearbox made using the gears from the other FP gearbox. We also used lots of wood and a fishing pole on the robot.

04-03-2008 15:10

Kate00

Re: pic: Team 1114 - Simbot SS

Actually, they have – as a series of seminars. Specifically, this is their presentation on design and game approach. And it’s even free! Some of the presentations were given at a series of seminars last year in Toronto, and they have been presented at the Championship in the past. Hopefully they will return this year. I saw them in Toronto last year - they were very well done, and incredibly useful. The success of these seminars is not only shown in their team, but the teams they've mentored or are mentored by their alumni, such as 1503, 1680, 2056 and 2166, as well as many more Canadian teams who were at the series of seminars in Toronto and those who have seen them at the championships.

04-03-2008 16:41

AdamHeard

Re: pic: Team 1114 - Simbot SS

Wow, High Gear is only 15 fps?!?! I trust your words over my guesstimation any day, but it definitely *seemed* faster than 15fps. What is the reduction in sprockets to the IFI wheels?

Sorry, but you lead to more questions

Where are you using wood and fishing pole? From the picture the only fishing pole obviously visible is the flag holder (not saying I don't believe you, just curious how you used the rest).

04-03-2008 17:24

Hunter

Re: pic: Team 1114 - Simbot SS

The reduction out of the AM to the wheels is 1.25:1 (15:12). Probably just seems faster because of smooth drivers.

The fishing pole is the flag holder, its light, flexible, strong and won't break easily when entangled. The wood is used on both the gripper and main frame. In the gripper, blocks of wood were cut to fit tightly inside the 1"x2" tubes and hammered into the tubes the pivot points to provide reinforcement. This allows us to bolt the shafts on with a lot more strength and reinforce the bearing holes. In the main frame there are blocks of wood cut from 2x4s that fit between the main rails and the outside plates. The wood acts like aluminum standoffs but is far stronger for a similar weight and was attached easily with wood screws. The large size of the blocks of wood gives better stiffness under moment loads than smaller standoffs (very large moment of area) and at ~1/10 the density of aluminum doesn't weigh too much.

04-03-2008 17:34

AdamHeard

Re: pic: Team 1114 - Simbot SS

Hmmm, that is very interesting. What Kind of wood do you use? How does it compare to other materials used to reinforce tube?

04-03-2008 17:45

Hunter

Re: pic: Team 1114 - Simbot SS

White Cedar. We have also used expanding foam to reinforce other tubes on the robot when we wanted to stiffen the entire length and not a specific section. For reinforcing a specific area the wood works extremely well for its weight. The tighter it fits the better though so some of the blocks were hard to hammer into place. I've used lexan in the past for this function but the weight of it is unnecessary in most applications and the wood works fine. It provides a huge strength advantage over aluminum tubing alone.

04-03-2008 19:00

Travis Hoffman

Re: pic: Team 1114 - Simbot SS

How much wood would a Simbot chuck if a Simbot could chuck wood?

I 2nd the vote for using wood for reinforcement.

We've been pounding wood into our frames since 2003. It's used primarily in the base of our arm this year where the tilt shaft and drive sprocket attach to the arm.

It also lets you get away with using thinner wall tube material (1.5" square 1/16" wall tubing vs. 1/8", for instance), reinforcing with wood only the areas you need to bolt stuff to.

Anyone care to post a closeup of the firing mechanism? I neglected to take any closeup pics of the more notable bots at Midwest (sorry Pavan!).

05-03-2008 20:44

Karthik

Re: pic: Team 1114 - Simbot SS

No, that one is going to remain a mystery for a while.

05-03-2008 21:00

Beth Sweet

Re: pic: Team 1114 - Simbot SS

Or at least until Karthik can figure out how to get his head out of the box...

Seriously Simbots, beautiful machine, worked like a dream. Your bot made me think I was at a week 5 regional!

05-03-2008 22:13

mark johnson

Re: pic: Team 1114 - Simbot SS

Team 1114 and Karthik great design. your team thought out of the box on this one.who would think you could have a arm that can grab and manipulate the ball so well but be a launcher bot at the same time.Fun watching your victory at midwest. CONGRATS!

08-03-2008 13:21

rjmah

Re: pic: Team 1114 - Simbot SS

Another power-house Simbot. Congrats on Midwest.

Your hybrid looks so smooth to actually be getting lane changes signaled. We're on mechanums this year. We took off our encoders. Except for basic forward, mechanums are somewhat hard to compute the location.

See you at Waterloo.