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#1
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Re: Weight? Estmate weight?
We've been planning on a 5foot frame, so 110 pound limit. Finished aluminum base weighs about 35-37 pounds with transmissions in. Add chain and wheels and we are at about 42lbs. This year we are making sure our arm team has enough to play with =P
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#2
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Re: Weight? Estmate weight?
We're looking at close to 60 lbs for chassis/drivetrain, not including electronics or pneumatics.....leaving the arm team and ramp team very little to play with on a 110 lb robot!
which is a good thing if you look at it from the CG perspective. |
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#3
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Re: Weight? Estmate weight?
We did a "full" CAD model this year for our robot, and according to the computer it weighs 94.4 pounds without electronics, chain, and fasteners. (hence the "full") But this is also coming from the computer that calculated our IFI wheels at 0.79 pounds each... so we'll see how it turns out. A word to the wise...when your doing your computer model... just keep in mind that fasteners can add a significant amount of weight.
A quick on CG though, you want to make sure you keep it lower than the distance between the center of your frame and the front or back drive wheels. This is usually somewhere around 10-15 inches depending on your wheel selection. If not...your robot may have some interesting driving characteristics... |
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#4
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Re: Weight? Estmate weight?
Well, right now our robot is only...maybe 10lbs?
---- Maybe we will gain more weight when we add more than just the wheels and control board. I expect us to not be light this year (as in every other year before). I dont see the point in a light robot. |
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#5
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Re: Weight? Estmate weight?
our chassis, electronics. air compressor, 4 victors, 4 spikes, all the proper wireing,
Full drving robot as seen here: www.mmrambotics.ca comes in at a smidge under 50 lbs without the battery. - Bochek |
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#6
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Re: Weight? Estmate weight?
Let me put it this way. I think putting me on the field would weigh less than the robot we're planning. Can we just ditch a battery or a motor?
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#7
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Re: Weight? Estmate weight?
We made a custom chassis this year, and when we weighed it, it came to about 42lbs with electronics.
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#8
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Re: Weight? Estmate weight?
We have an estimated weight of 98 pounds and I believe we're at 30-40... or something. That's just the chassis.
I think we're in pretty good shape. |
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#9
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Re: Weight? Estmate weight?
After finally inputing the correct weight of the CIMs and other motors into our model (Which caused a scare one night when I realized that the weight of the motors were ~3lbs total), we are at 103 lbs without ~4 lbs of chain. I feel much better about the robot's weight this year than last year, where we had to remove 10 lbs of weight on the Thursday of the competition. This should be the first year in my 4 years of FIRST where we add extra weight to the robot instead of frantically take it off.
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#10
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Re: Weight? Estmate weight?
We've weighed all of the stock parts, frame, and used inventor to estimate weight. We're planning on using the smaller heavier config and weight is gonna be close but I think we'll make it. There's always the hole saw
! But i agree i would much rather add lead weights than end up making swiss cheese out of our bot.![]() |
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