please Help!
 

How much should (or has your) working chasis wieght? Please give me an idea of how we are doing.

about 36pounds for a complete metal frame of our robot

Well how much does your it weigh right now?

Ours (team 930) is estmating their working chasie to weigh about 75 pounds. We are hoping to knock it down to 70 building it.

That should get you thinking on what we are building as a chasie :-) I will not mention our design

Now what you definetion of chassis, is it just the square of material that the wheels are mounted on, or do you count add ons like arms and other appendages, I personaly define it as just the square of material the the motors are on, With that I say our "Chassis" weighs 10 pounds

we are at 60 pounds with a working drivetrain and battery. this scares me because this leave only 70 pounds for the rest of the robot. what do you think?

Depending on what you have in mind for your machine to do, you could be fine, or you could have problems....it all depends on what you want to do with the weight you have left...

Our lower deck of the frame is the maximum dimensions and consists of 6 pieces of extrusion, 8 corner gussets, and hardware and weighs 10.5 pounds. We will be adding a couple plates for mounting the gearboxes, a couple more for the arms, and 8 more short pieces of extrusion to stand off the plates that hold the arms. The 8 pillow blocks for the axles weigh maybe 4 pounds, then there's the 14 pound battery, all the sprockets and chains and bearings, wheels, axles, shaft collars, 4 drive motors, 2 window motors for the arms, and our suction device (which is going to be so cool you will faint when you see it in action) , and electronics.

And not to forget the rotating light. This is especially important to remember if you are going under the bar.

The bottom line is, you're robot is going to meet or exceed the 130 pound limit no matter what you do. I don't see any sense in weighing things like motors or electronics because they are going to weigh what they are going to weigh. Just try to keep the thing light from the start because that limit comes up A LOT faster than you might think.

Actually your on track. We are around the same weight area for our robot and we expect to be underweight.
36 pound frame
16 pound battery
16 pounds compressor
20 pounds completed gearbox assembly(with wheels)
10 pounds motors and nuts
That is 98 pounds with a an almost complete robot like you have it. Add a few extra pounds for control system and electronics and guess what you don't have to drill any holes in your robot. Of course our robot is a simple design and I'm estimating some of the objects weight on the heavy side

wow, the battery is 16 pounds? it doesn't feel that heavy when i pick it up though...weird

Our frame in total is 17.6 pounds....

I thought it was more around 13 pounds?

*Cough* Speed holes *Cough*

yeah, we weighed our battery the other day, i believe it was 13.2lbs

Our frame made of extruded aluminum and Lexan weight 30 lbs, motor mount, plate, and sprockets are 14.5lbs, THE BATTERY WEIGHS 14 LBS! Each track assemply will weigh in at 16-17 pounds, and with a sundry of other weight costs, we're hovering at 108 lbs.