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ajlapp
02-02-2003, 01:13 PM
As of Saturday afternoon the robot is 90%. The wiring pictured is half temporary half official, we still have work to do on our box stacking device, and plenty of armor plating to add.

Semi-official weight as pictured is about 75 pounds. There are about 20 more pounds of robot components to be added, the rest after that is for pretty stuff.

Specs:

2 wheel swerve
3 d.o.f. arm
box indexing device that creates stacks of 4 boxes

the robot has a ground speed of about 5.5 fps, fits nicely under the bar in about 1.5 to 2 seconds(total fold time), and has really surprising traction(mostly because the arm allows us to distribute the cg directly over our front wheels), the final development of this system should allow us to create stacks of 4 and then place them of stacks of up to 3.

http://www.chiefdelphi.com/forums/pictures.php?s=&action=single&picid=3573&direction=DESC&sort=date&perrow=3&trows=4&quiet=verbose

http://www.chiefdelphi.com/forums/pictures.php?s=&action=single&picid=3571&direction=DESC&sort=date&perrow=3&trows=4&quiet=verbose

http://www.chiefdelphi.com/forums/pictures.php?s=&action=single&picid=3570&direction=DESC&sort=date&perrow=3&trows=4&quiet=verbose

http://www.chiefdelphi.com/forums/pictures.php?s=&action=single&picid=3572&direction=DESC&sort=date&perrow=3&trows=4&quiet=verbose

Anthony Lapp
Lead Design
Team 221-->857 Superior Roboworks

sanddrag
02-02-2003, 01:20 PM
Very Nice! How many students, engineers, teachers, etc are on your team?

Also, Where does the rotating light go?

Ianworld
02-02-2003, 01:44 PM
Very very cool. Wish i'd thought of laying the boxes down backwards on our arm. i'll see if i can convince my team to alter the arm to do that... just might work :). Nice vector drive and omniwheels also. Reminds me of what our robot should look like, instead of being pieces. Sweet robot and good luck at the competitions.

ajlapp
02-02-2003, 02:32 PM
we are a college team run by college students. we have roughly 10 or 12 college mentors, about 15 high school students and one high school teacher, although his time is tight and he is unable to be really involved.

the team was officially started in 2000 by myself and three other friends of mine from high school. i was a member of team 221 as a senior in high school, the other guys were from team 27, we started the team as freshman here at tech.

Todd Derbyshire
02-02-2003, 05:04 PM
How do you pick up boxes? Do you have to pick them up by being right on top of them?

ajlapp
02-02-2003, 05:29 PM
the chain on the arm when finished has chain hooks which lift the boxes along the rails.........

some of this assembly is pictured, but not all of it. the arm can pick up boxes in any position, including parallel to the ground or completely perpendicular to it.

Duke 13370
02-02-2003, 06:20 PM
Quite impressive. I really need to see it in action to ever hope to comprehend what in the world it's doing. I assume you're going to at least one of the michigan regionals, so mabye i can see it there.
Very impressive.

GregT
02-02-2003, 06:30 PM
Hmm...

One thing is for sure, that robot is sexy.

My only dislike is the 2wd and crab+omni wheels. I would think you might have some problems going up the ramp, and will not be able to compete on the top of it...

Besides that it's great for it's intended purpose.

Greg

AJ Quick
02-02-2003, 10:42 PM
That is extremely amazing.

foursixnine
02-03-2003, 12:17 AM
Originally posted by GregT
Hmm...

One thing is for sure, that robot is sexy.

My only dislike is the 2wd and crab+omni wheels. I would think you might have some problems going up the ramp, and will not be able to compete on the top of it...

Besides that it's great for it's intended purpose.

Greg

My guess would be that they aren't going to try for the ramp. I don't know if you were around for 2000s game but Chiefdelphi had a similar strategy. While everyone was fighting over the bar they continued to manipulate the balls uninterrupted. It proved to be a good strategy, and that years robot is still a favorite of many, including myself. Based on 857s drive, limbo capabilities and large stacking arm, my guess would be they are going to try a similar strategy by manipulating the bins/stacks while the other bots are fighting over the ramp.

Nice looking robot guys.

Rob Colatutto
02-03-2003, 12:23 AM
it looks a little tipsy... did you do any tests pushing against the top of it? or put it up against your old bot, see if you get pushed over

Joe Johnson
02-03-2003, 01:02 PM
What to folks think about the bolts attaching the tread?

I think literal interpretation of the rules would not allow them.

Other thoughts?

Joe J.

Bill Gold
02-03-2003, 01:30 PM
Originally posted by Joe Johnson
What to folks think about the bolts attaching the tread?

I think literal interpretation of the rules would not allow them.

Other thoughts?

Joe J.
I agree Joe. I was under the impression that attatching tread in part, or completely in this fashion was against the rules.

Greg Perkins
02-03-2003, 02:17 PM
it looks pretty flimsy.

it doesnt have much of a solid framework. o well at least u guys did what u set out todo



bad

GregT
02-03-2003, 03:32 PM
Originally posted by foursixnine
My guess would be that they aren't going to try for the ramp. I don't know if you were around for 2000s game but Chiefdelphi had a similar strategy. While everyone was fighting over the bar they continued to manipulate the balls uninterrupted. It proved to be a good strategy, and that years robot is still a favorite of many, including myself. Based on 857s drive, limbo capabilities and large stacking arm, my guess would be they are going to try a similar strategy by manipulating the bins/stacks while the other bots are fighting over the ramp.

Nice looking robot guys.

It looks like a thief bot to me, and a thief bot would work best over the ramp.
Greg

ajlapp
02-03-2003, 04:05 PM
it looks a little tipsy... did you do any tests pushing against the top of it? or put it up against your old bot, see if you get pushed over

we have done a little testing........

because of the 3 d.o.f. of the arm assembly, radical changes in cg position can be made. The enitire assembly when folded down is just over 14 inches and we can navigate the ramp in that form, so we can be very tippy, or very not tippy when we want to be.

SuperJake
02-05-2003, 07:32 AM
Originally posted by Joe Johnson
What to folks think about the bolts attaching the tread?

I think literal interpretation of the rules would not allow them.

Other thoughts?

Joe J.

It is my opinion that the judges/refs/inspectors at each of the competition sites will interpret this rule differently. If the intention of the fastening device is to gain traction (say by backing the screws up a little so they stick out beyond the tread, or if washers or wire ties are perpendicular to the forward motion of the robot in order to 'dig-in' to the carpet), then they would make you change it.. without a doubt. But if you just need something that will fasten the tread to wheels, I think it will be okay as long as an effort is made to preserve the carpet.

Adam Krajewski
02-05-2003, 12:19 PM
Originally posted by Joe Johnson
What to folks think about the bolts attaching the tread?

I think literal interpretation of the rules would not allow them.

Other thoughts?

Joe J.
The "bolts" are actually smooth-faced dome-style pop (blind) rivets. Their function is solely to fasten the 'traction device' belt to the wheels. They are not traction devices and do not protrude through the belt to ever make contact with the carpet.

Rule M17
Robot wheels, tracks and other parts intended to provide traction on the playing field (“traction devices”) may be purchased or fabricated. In no case, will traction devices that damage the carpet or other playing surfaces be permitted. Traction devices may not have surface features such as metal or hard plastic studs, cleats or other attachments.
Whether you want to use the literal meaning of the rule (no metal surface features) or the spirit of the rule (no carpet damage), we believe our fasteners are completely legal. They are below the surface of the traction device itself, so they do not give the traction device metal surface features; nor do they cause any carpet damage, as they do not even come in contact with the carpet. This may be up for interpretation when it comes time for inspection, so we are prepared to make alterations if necessary to comply with an inspector's decision.

Adam

MikeDubreuil
02-05-2003, 12:52 PM
FIRST has declared in Team Update #10 that metal fasteners used to attach tread to wheels are permissible.

Bill Gold
02-05-2003, 02:09 PM
Originally posted by MikeDubreuil
FIRST has declared in Team Update #10 that metal fasteners used to attach tread to wheels are permissible.
I just looked through update #10 and couldn't find anything related to legalizing the use of metal fasteners to attatch traction materials to wheels. What page is it on? Maybe I'm just blind.

MikeDubreuil
02-05-2003, 03:30 PM
Thank you for calling me out on that... You are correct and I was in another world when I posted that.


FIRST clarified their position on Rule M17 on the following post to the FRC Forum by a person on our strategy team.

http://jive.ilearning.com/thread.jsp?forum=3&thread=1536&tstart=30&trange=15

Bill Gold
02-05-2003, 03:39 PM
Very cool. Thanks for bringing that question/answer from the FRC Forums to my attention. I missed it.

Gobiner
02-05-2003, 05:17 PM
What happens when your robot is smashed into at full speed? (It will probably happen to most robots at some point)

ajlapp
02-05-2003, 08:28 PM
What happens when your robot is smashed into at full speed? (It will probably happen to most robots at some point)

remember this is a picture of our robot as of last Saturday. with 1/3 of the build season left, the robot will grow in weight and robustness as skirting, and armor plating are added. our weight as picture was about 85 pounds.

several things in that pic are also quite temporary like the tube frame. if you have an opportunity to see the robot closer to ship it will most likely have a more substantial outer surface.

ajlapp
02-12-2003, 10:18 AM
the robot is shaping up nicely.