Re: Weight Watching
 

With our robot we were only 4.8 lbs over and when we remove our steal pipes and replace with allumim we will go to .8 and when that is done we will just remove one cylinder to get to 120 lbs exacly .

this is the first year that i feel truely confident in out robot. with a passive popper, powerful launcher, and a good hearder. and ultra sonic hyrpid mode we will hopefully succede.

Team 1980
Team1980.org

Re: Weight Watching
 

We are about 1lb over, but we have plenty of 1/8 inch 6061 that we can swiss cheese. :)

Re: Weight Watching
 

We are about a pound under with a 16 inch section of bumper on still.

Re: Weight Watching
 

Ours went in the box at 90 lbs. This was the first year we didn't have to worry about weight.

Re: Weight Watching
 

i can understand how all these teams are overweight unless they are throwers....we used steel for just about everything and still made it in at 118 lbs. not that i would recommend that or anything....next year aluminum is the way to go. We didn't even swiss cheese anything.

Re: Weight Watching
 

It depends a lot on the number of motors and actuators you're using. We're tight on weight and everything structural on our robot is either thin plastic, thin wall aluminum tube, or thin aluminum plate. Part of the reason why we are so close to the weight limit is because we have about 40lbs of actuators and their associated gearboxes. Add sprockets, chain, tensioners, control electronics, mounts, and so on and you have a significant portion of the weight budget. Last year, we used smaller actuators (less power was needed) with less geardown paired to a much more complex superstructure than this year's and we were easily under weight.

Re: Weight Watching
 

We're a catapult, and we had to swiss cheese only a few pieces to make weight this year. And when I say "only a few," I mean it; we were maybe a pound over after making a few things more robust, and we always have places built in to take weight out if needed.

Re: Weight Watching
 

I believe our robot is just barely overweight, less thank half a pound. We'll switch out our bolts for aluminum bolts and we put a lighter chain on our arm, which should drop us to the legal limit :)

The funny part was the day before ship date we weighed the robot and it was 118.5lbs. Then I noticed that our 2 pound chain wasn't on the arm :ahh:

Re: Weight Watching
 

we managed to rig everything up with pulleys instead of pneumatics........it turned out to be just as stable and strong...and just as fast when we made a long lever arm......Plus it prolly saved weight. but our steel frame...not such a great idea....it was nice because we got it free but if we used pneumatics....we would've been WAYYYY over weight

Re: Weight Watching
 

We actually weighed in right on 120 lbs but we can lighten up a little bit

Re: Weight Watching
 

Lightning weighed in at around 110 before we put him in the crate.
Our bumpers weigh in at 14 lbs, 12 oz.
It was a miracle for the ÜberBots, because we're always waaaaay overweight. We didn't even need to cut holes in our robot!

Re: Weight Watching
 

Here is an interesting assignment for you. How many 1" diameter holes will you have to cheese in order for you to remove only one pound. May I suggest a stepped bit, we used one last year with great success.

PS We came in at 122 pounds with the bumpers attached and no back up battery. This is the first time in three years that we did not spend the last few days removing pounds and pounds. We had 1/16th in aluminum tubing last year. I was absolutely astounded by the number of 1" holes we had to cut to make a pound.