Under or over weight?

[Spikey]

We are currently at 111, we have some extra weight for an awesome shell, hopefully they can keep it under 120

[sanddrag]

Originally Posted by laditek

Well 50 1" holes that are 1/8" thick alluminum equals 1 lb
hope that trivia helps

You wish. Actually, that only comes to about half a pound.

Anyway, our frame currently weighs only 11 lbs. But each gearbox (there will be two) weighs approximately 14 lbs including motors. Each joint of the arm weighs about 12-13 lbs including motors. Then we have to add wheels which are 5.5 lbs for all of them, then axles, pillow blocks, sprockets, chains, electronics, pneumatic tanks, the actual pieces of the arm, something to mount the gearboxes on, some lexan for electronics and a battery mount.

I have no idea what we will end up at. I know we will be close, but I don't know if we'll be over or under.

Perhaps we should pile everything (I mean every thing that is going on the robot) in a big box, and head down to the local pet hospital to borrow their scale.

[Zippiot]

my team made a slight miscalculation...our robot complete without electronics weights 86 lbs...max is 120 without batt right?
should we put some weight son the bottom to bring down the center of gravity?

[M. Hicken]

At this point were about 85lbs. All of the physical stuff is done minus the camera. The other day i was putzing around the shop and found a piece of .75" thick high carbon steel laying around, The sheet is about 2'x3.5' and weights 50+. So were going to have a sponser cut it with the oxy torch, add 4 bolts, and bam, you now have a light weight robot with a steel belly pan, just incase i decide to take it off roading on my next jeep trip, if i hit any rocks, it wont matter ;->

[Collmandoman]

we have 2 competing arm designs, one will leave us with about 20-30 pounds to spare the other with about 60 -- Post pictures saturday =)

[Daniel Brim]

Well, we got blindsided yesterday and found out that our robot will be 10 pounds overweight when we finish . What we're gonna do is we are cutting a large truss pattern in two of our arm components, which saves around 4 pounds, and bore the heck out of the kitbot gearbox (2-3 pounds each probably). Beyond that, I don't know

[DCA Fan]

Originally Posted by DanielBCR

Well, we got blindsided yesterday and found out that our robot will be 10 pounds overweight when we finish . What we're gonna do is we are cutting a large truss pattern in two of our arm components, which saves around 4 pounds, and bore the heck out of the kitbot gearbox (2-3 pounds each probably). Beyond that, I don't know

Yeah, the good news is we actually have time to do this before ship. I remember in 2002 we found we were overweight while at SoCal which lead to the most frantic lightening of a robot I have ever seen. I'd rather not repeat that experience.

[Peter Matteson]

Did you know welding the kit bot frame save over a pound!

[Steve Yasick]

B.O.B. is just about done (maybe Saturday). 101# and change. What do you do when you are under weight? I feel like we should cut out circles and weld them to the frame......I guess we will wait until 4:30am on February 21st for that! ....Did I say B.O.B. is done?......wait lets add something!

I hope all is well for you during build season.

Steve Yasick

[Bentow]

We are seriously considering adding cinderblocks to one side to compensate for the torque and because we have soooo much weight to play with. We are already using diamond plate for our electronics mounting surface to add weight. 12ft @ 55degrees. THATS A LOT OF TORQUE.

Yea we love tipsy robots.

[Peter Matteson]

Originally Posted by Bentow

We are seriously considering adding cinderblocks to one side to compensate for the torque and because we have soooo much weight to play with.

I suggest steel. It's denser and easier to attach.

We ballasted/reinforced our robot with steel last year. We had plenty of weight to play with after removing the arm.

Pete

[Zippiot]

i found something yesterday that surprised me...instead of using 1/4 aluminum plate it is 1000 times easier to use 1 inch thick lexan, it is also just as strong and about the same weight (plus its see through!) if i had known this from the start many of our mounts would be lexan, which would actually drop us 10 lbs according to my math. right now without battery and without a few electronics (just the board and speed controls) we are 86 lbs, but we used large wheels and even though the bot is very stable (almost impossible to knock over as i have found out) we are going to add some steel weights to the bottom to bring down our center of gravity. maybe a spinning light display too

[justbobdanish]

wow...underweight....ours is probably 5-10 lbs overweight...we know its .5" too wide, but we are fixing that....

WE LOVE WEIGHT HOLES!!!!

[sciguy125]

It hasn't been weighed yet, but our chassis/drivetrain with motors is in the area of 35lb. I'm not sure how much everything else weighs though. We're sure that the robot will be under weight before it enters its first match though.

[Mohsin]

Hmmm..... our robot is at the border line right now, and yes we will end up drilling holes, me thinks that the swiss would make a lot of money if they started to sell swiss aluminium, as they sell swiss cheese