Re: Under or over weight?
 

The battery doesn't weigh anything this year.

Re: Under or over weight?
 

Right, but I was just using it as an example. I checked it because I knew it weighed around 13 lbs.

In addition, the missing 7 or 8 pounds make a big difference in a center of gravity prediction that can be made if everything weighs right.

-Daniel

Re: Under or over weight?
 

wait.
is it ever possible to include everything we want
and still be underweight?

i hear them drills spinnin'.

our team's wishful thoughts are that we're underweight.

Re: Under or over weight?
 

Our robot is underweight right now but I want to see what the weight is in inventor. How do you see the weight in inventor? :confused:

David :D

Re: Under or over weight?
 

Right click the name of the assembly or part that you want to weigh, click on physical, then click update.

-Daniel

Re: Under or over weight?
 

Well lets put it this way ...... we are goin to be putting 25 pounds of couter weights on our robot and we will still have 10 pounds left over so we are WAY UNDERWEIGHT!!!!!!!!!!

Re: Under or over weight?
 

In the end, ours will weight 119.9 lbs. As of right now, our teacher thinks we are overweight and parts will get taken off and functionality will be reduced. I think we are right about there. One thing that worried me is that one "joint" section of our arm is 13 lbs, and we have two of those and that does not include the arm "segments" :ahh:

Does anyone have estimates on how much all the electronics and wiring will weigh?

Re: Under or over weight?
 

Very nice, now i can confirm that we are underweight from all point of view. :D

Re: Under or over weight?
 

People can't put everything on a robot and excpect it to be under 120 lb.
I think a lot of teams' "underweight-ittude" is due to better planning, and experience.
My team is currently underwieght...we are close but still good.
Hoo-ray for plannig :p

Re: Under or over weight?
 

We weighed our electronics box saturday (we don't have lexan for a mounting board yet) and i beleive it came out to arouind 5-6 pounds (just the standard stuff in the box). But I'd have to double check this week at one of the meetings...

*makes mental note to get a copy of paper listing weighs to put into an excel spreadsheet*

Re: Under or over weight?
 

So, far, our Drive/Chassis and what we have of our arm assmebly is weighing in around 63 lbs. I expect to add another 15-20. We will probably reserve the rest for counterweight.

So, um...We'll be under. :D

Re: Under or over weight?
 

Right now we're estimating our robot to be about 100 pounds.

Re: Under or over weight?
 

So far our robot is over weight for about 10 pounds. But we probably will solve the problem by drilling holes to reduce the weight of the robot.

Re: Under or over weight?
 

That's approximately 4200 holes with a 0.5" diameter, assuming the material is 1/8" thick. Better get busy, and I'd get a few extra bits as well.

A better option is to take a close look at your robot and figure out where you have large areas of material you don't need or where you can use thinner material. A spreadsheet listing all of the weights of the parts can be very helpful here. It can identify the "heavy hitters" so you know where to start looking early.

Re: Under or over weight?
 

Last year at the end of week 4, 1114 weighed in CONSIDERABLY overweight. It was a major setback to say the least.

Bosch extruded aluminum frame, bye bye
hello 1 x 1 x 1/16 square tubing

gearboxes- 1/4" plate was milled out to 1/16 where possible. Drive shafts drilled out down the center. Gears, drilled out. Aluminum hubs made for larger ones. Steel shaft collars replaced with custom made aluminum ones.

Arm - see my signature. Also double chains on shoulder pivot, reduced to one.

turret for arm- it was nice knowing you

ball herding arms- you never had a chance

This year, everything was built ALAP (as light as possible) the first time. Spending even a couple days lightening cuts into invaluable practise time, which can be the difference between a regional championship and a quarter finalist.