How much does your robot weigh?
 

My team has weighed our robot minus a few very important subsystems, and we are alarmingly close to the weight limit. Naturally our next thought was how much does everyone else's robot weigh now? What are you all doing to remove weight? Thanks!

Re: How much does your robot weigh?
 

Holes. Lots and lots of holes. They don't weigh. :eek:

Re: How much does your robot weigh?
 

http://www.chiefdelphi.com/forums/sh...ad.php?t=98765

You can look through that thread and get some pretty good answers for both pre and post building.

Short answer? Swiss cheese the robot.

Re: How much does your robot weigh?
 

If you do swiss cheese it, watch out for how strong the areas will be after swiss cheesing them.
Also, think about getting rid of unnecessary components of your robot (you should think through this a lot).

Re: How much does your robot weigh?
 

I can't believe it but we're going to be....under the weight limit this year. :eek: Our robot is going to be anywhere from 90-100 pounds. This hasn't happened to 256 EVER! The scary thing is, though, once we're all underweight, we'll add more weight to get to 120 pounds, since that is our weight goal for this year (Gotta balance those bridges, you know.)

Re: How much does your robot weigh?
 

Well, for now, our robot weighs only about 65-75 lbs, and that's not even with our lift and shooter systems yet...We can't totally get a clear exact weight because our force plate isn't big enough to fit our robot.

However, we would like to make this robot as close to the weight limit as possible, compared to our rookie robot last year that weighed only about 98 lbs and costs less than $1100 minus the 2011 KOP parts.

Re: How much does your robot weigh?
 

roght now our robot weighs 15 pounds.

we have a few more "minor" additions before it is done.

Re: How much does your robot weigh?
 

We have put ours on a treadmill. It should shed those excessive pounds and be in shape to compete.:)

Re: How much does your robot weigh?
 

I hope that is withOUT the battery, otherwise you has a slight issue (The battery IS 15lbs...) XD

Re: How much does your robot weigh?
 

Our robot will weigh 119.999999999 lbs roughly

Re: How much does your robot weigh?
 

weird our batter doesnt weigh 15 lbs. :( no fair you get more power !!!!!

Re: How much does your robot weigh?
 

Well, 15ish lbs, give or take

Re: How much does your robot weigh?
 

Our chassis weighs 14 pounds, WITH the battery. :p

On a more serious note, 15/120 isn't much, but it's a pretty decent amount of the robot weight. It's like a whole apparatus. It seems like the battery can quickly change the center of gravity on a robot depending on where it is. Unfortunately, our center is hollowed out to take balls in, so it looks like we'll either have to find a new place for our battery, or put it on top of our shooter, which probably won't work very well.

Re: How much does your robot weigh?
 

Spoilers :eek:

Re: How much does your robot weigh?
 

(Read in a sarcastic, monotone voice)

Yes. 256 is going to have their battery mounted on the very top of their robot this year. :|

:D

Re: How much does your robot weigh?
 

We are at 70 lbs in cad.
And that is without electronics and pneumatic [no compressor].
We should be just about 110 fully loaded.

Re: How much does your robot weigh?
 

(Read in a sarcastic, monotone voice)

Yes, It's not like I bolded anything.

:ahh:

Re: How much does your robot weigh?
 

I know! I just knew that if I mentioned something totally different, than someone would catch onto it. :p

Re: How much does your robot weigh?
 

o.O i JUST DECIDED THE SAME THING 5 MINUTES AGO. WE AR HAVING ALL ELCTRONICS ON OUR SHOOTER TOWWER WITH THE BATTERY LOCATED DIRECTLY ABOVE THES SHOOTER!!!!!!1!!!1!!

Re: How much does your robot weigh?
 

I think someone needs less mountain dew and more sleep :p

Re: How much does your robot weigh?
 

BEST. THING. EVER! :D That saying just made my day!

Re: How much does your robot weigh?
 

That HAS to go in my signature!

On an unrelated note, I probably just described myself. Haven't gone on an all caps rage yet, but there's always time...

Re: How much does your robot weigh?
 

Thanks! :D

Re: How much does your robot weigh?
 

no really we don't want our "shooter" flying off the robot and we need the battery weight to hold it down.

Re: How much does your robot weigh?
 

The first iteration weighs approximately 120 pounds, without any weight reduction techniques. This is very strange for our team :p

CAD is a lifesaver.

Re: How much does your robot weigh?
 

Drive itself is 86 lb, with the electronics board, about 90 lb.

Re: How much does your robot weigh?
 

In CAD? 93 lbs + chain and fasteners (should bring it up to about 110).

In real life? About 20. (Yeah we're behind :P)

Re: How much does your robot weigh?
 

On the bright side, you may be the lightest robot at SVR! How easy will it be to balance the bridge with three robots when one of them weighs 1/6th of the maximum weight! :p

Re: How much does your robot weigh?
 

As of last night, with all major components mounted, approximately 107lbs.

BTW batteries weigh ~13lbs, weight adds up with 6awg wire on the battery though.

Re: How much does your robot weigh?
 

We are looking at around 70-80 completely finished with no reduction techniques. ;) and a note to everyone using autodesk- it does have CAD weight issues that can be as high as 20-30 lbs off. Solidworks is around 1-2 lbs off. But in autodesk try to manually enter each parts' weight for a better estimate

Re: How much does your robot weigh?
 

Our robot weighs 120.0 lbs. That's my story, and I'm sticking to it.

Re: How much does your robot weigh?
 

I remember one year our robot weighed 120.1 lbs. We were allowed to play because the scale was accurate to plus or minus .1 lbs.

Re: How much does your robot weigh?
 

With a taste of irony, our robot weighs 103 lbs. Honest to goodness truth. haha

Re: How much does your robot weigh?
 

As of last night our robot weighs 113.4 pounds, it still needs some wiring done though and a couple pieces of lexan put on, so its gonna be close.

Re: How much does your robot weigh?
 

Our weighs about 105 with all the necessaries on it. I guess we'll be able to put on 15 pounds of cool decorations on it this year :cool:

Re: How much does your robot weigh?
 

If the words "I can currently lift our robot with my pinkie finger" mean anything to you, Try to imagine our robot's weight. Still a work in progress, though... :D

Re: How much does your robot weigh?
 

For all of the teams at a weight of like 110-120 (like ours) I just imagine them at last min, saying "Oh no we never put the bridge mechanism on...

Luckly ours is sort of on. And on a side note, do you think the inspectors would declare a Van Door motor with just a pair of vise grips attached to it, safe? That was the first idea that popped into my mind when making that mechanism lol.

Re: How much does your robot weigh?
 

we're looking at 111 as of about an hour ago, looks like it will top out at 115-120

Re: How much does your robot weigh?
 

Is that 20-30 lbs over or under? Because we designed an overweight robot in CAD, and then gave up on trying to adjust the design and said, we'll just build it and then swiss cheese it. But it Autodesk overestimates by 20 pounds, then we have a hundred-ten pound robot.

Re: How much does your robot weigh?
 

we weighed our robot today and the drive with all the electronics and lexan we are at 51 lbs. we still have around 50 lbs. left to add

Re: How much does your robot weigh?
 

Lucky enough to get a peak at awesome?

Re: How much does your robot weigh?
 

Sounds more like serendipity than irony ;)

Maybe we should build a 95lb robot one year... :D

Re: How much does your robot weigh?
 

How are you guys weighing your robots, we were thinking of using a hanging scale because last year the force platforms from the physics labs were off by quite a bit

Re: How much does your robot weigh?
 

To get a "close enough" weight of the robot, use a simple bathroom scale. Set one end of the robot on the scale, the other on a block to keep the robot level - that'll give you "half" of your weight. spin the robot around, and now you have the other "half".

I put half in quotes, because it's not really half - if your center of gravity isn't in the middle of the robot, you'll see one end weight more than the other. This can be a great way to help discover and fix CoG issues.

Re: How much does your robot weigh?
 

Put a piece of plywood down on the bathroom scale instead, then either zero out this weight or note how much the plywood weighs. Then you could put the entire robot on the plywood and weigh the entire robot.

Re: How much does your robot weigh?
 

4 pounds to spare.

Re: How much does your robot weigh?
 

And then...what? Drill some holes in the plywood so you can see the scale?

Re: How much does your robot weigh?
 

120.3 pounds - we are looking at clever reduction strategies

Re: How much does your robot weigh?
 

107 lbs of Robot Love

Re: How much does your robot weigh?
 

Just fill your pneumatic wheels with helium. Thatll make your robot weigh way less.

Also we're always conservative with weight during build, and have just barely hit 100 the past two years. Its nice not to have to worry about that.

Re: How much does your robot weigh?
 

Those heavy-duty mecanum wheels and the 4-side intact were really heavy. We'll get under 120 w/o sacrificing any functionality.

Re: How much does your robot weigh?
 

That shooter of yours could probably take a few lightening holes.

We thought with the new frame wed be heavier...somehow we came up lighter.

Re: How much does your robot weigh?
 

Ours has yellow jacket-sized holes in it!! Could have more though...

Re: How much does your robot weigh?
 

Not enough.

Re: How much does your robot weigh?
 

Here is all 119.5 lbs of 706's "Mohawk" robot. All pink and black and beautiful.
http://s1121.photobucket.com/albums/...t=100_0013.mp4

Re: How much does your robot weigh?
 

Silly us didnt weigh it until jsut now and the weight was...
...
...
... 148 lbs :*(

Re: How much does your robot weigh?
 

::Yikes::

We are at 115 lbs

Re: How much does your robot weigh?
 

Le heart attack.

Your team is in our prayers.

256 is a nice and comfortable 119, which leaves us 5 pounds for LED lights!

I know we only have 1 pound left, but we have 5 pounds of LEDs in our room, and they're not going to waste!

Re: How much does your robot weigh?
 

Our robot was "pre-cheesed" this year. guess the 4000 3/16 holes, and the 1500 3/8 holes helped, because it weighs 109 lbs. extra weight will be added to improve our (currently) sub par bridge and bump manipulator.

Re: How much does your robot weigh?
 

Hopefully that included batteries and bumpers!

Re: How much does your robot weigh?
 

117.5 lbs after we threw a few large holes in our chassis.

Re: How much does your robot weigh?
 

sadly it did not :(

Here is what our robot pretty much looks like


We are struggling to see where the weight is coming from :/

Re: How much does your robot weigh?
 

Our robot has no shooter or loader and is already at 120

Re: How much does your robot weigh?
 

118.5 last we checked. It's going to be just under 120, probably 118-119.5 when we compete.

Re: How much does your robot weigh?
 

For teams that are having trouble making weight a few suggestions for next year ...

1 - Keep a spreadsheet with the weight of all components
2 - Update that spreadsheet EVERY day!
3 - Appoint a trustworthy team member to maintain the spreadsheet
4 - Every time you consider a new piece of your design try to estimate the weight. it is not hard to do, one can google the density of aluminum & steel and the weight of COTS parts are usually included on their web sites
5 - Get a good scale
6 - Take the time to minimize weight in every part of the robot as you go, not at the end.
7 - Shoot for 110 or so because wire, nuts, bolts and last minute safety features weigh more than you think.

HTH

Re: How much does your robot weigh?
 

Make detailed CAD models! Remember that the more accurate your CAD models are, the more accurate the weight they output will be. It will never be perfect, but it will give you a fairly good idea of your approximate weight.

Team 2658 is looking at a weight of 85 or 95lbs, depending on which shooter is used. Team 3749 is looking at something closer to 115lbs.

Re: How much does your robot weigh?
 

Our robot weighs about 110 pounds.

Re: How much does your robot weigh?
 

119.8 measured before bagging it up last night :D :ahh:

Re: How much does your robot weigh?
 

115-117 lbs. Strange because our robot is much smaller than last year's.

Re: How much does your robot weigh?
 

Ours weighs 119.4lbs, very very close to the limit but thankfully under.

Re: How much does your robot weigh?
 

119.4 pounds.... Cutting it too close... and we don't have sponsor stickers on there yet :(

Re: How much does your robot weigh?
 

101.3

Would it be a bragging point if you had to add weight? (Just wunderin, no offense to anyone nohow)

Re: How much does your robot weigh?
 

108 lbs, right now.
Adding maybe three or four pounds for our bridge-lowering-device, but that's it.

Re: How much does your robot weigh?
 

Final weigh in at 117.7 pounds.

Last year where we had to make Swiss cheese out of the lexan to get under weight.

Re: How much does your robot weigh?
 

121 pounds... But we have a lot of metal we can get rid of, so no worries there :)

Re: How much does your robot weigh?
 

115, our first robot less than 119.9 in 6 years!

Re: How much does your robot weigh?
 

109.7 pounds. Came as a shock to us because it looks and feels so much lighter.

Re: How much does your robot weigh?
 

115

Re: How much does your robot weigh?
 

118.95

Re: How much does your robot weigh?
 

~105-110, but we plan on adding weight to balance out our COG

Re: How much does your robot weigh?
 

If the scale at the competition has a tolerance of +-0.1 lbs, will a 120.1 pound robot pass inspection?

Yeah, we're right at the limit.

Re: How much does your robot weigh?
 

118.1 with the new Weight Watchers Robotic diet system :D

118 pounds on the dot.

Re: How much does your robot weigh?
 

FRC2168's 2012 unofficial weight 112.5lbs

Re: How much does your robot weigh?
 

118.3

Re: How much does your robot weigh?
 

117 at present, will definitely be 119.9 at regional

Re: How much does your robot weigh?
 

117.5 ish;)
Scale is just a bathroom scale, not sure how accurate that is, but hopefully close.

Re: How much does your robot weigh?
 

117lbs
but now we need to put under glow :cool:
(it was a goal for us last year)

Re: How much does your robot weigh?
 

Not sure. No weighing mechanism in high school. Guessimating < 120 lbs

Re: How much does your robot weigh?
 

118 LBS as bagged.

-Nick

Re: How much does your robot weigh?
 

At the 2008 CMP our robot weighed in at 120.1 - in a panic, we ripped off one of the decorative covers on the rear of our bot to come in at 119.9. The volunteer operating the scale was nice enough to tell us that we could put it back on as the scale had a .1 lb margin of error. I'm fairly sure this holds true at most/many/all events, but I'm not too sure.

As for 2012, we're barely at 100lbs, although we're still missing a few minor components. Competition weight on the bot should be 105-107lbs pre-ballast.

Re: How much does your robot weigh?
 

My team's robot is, to my absolute amzement, 110.240 lbs. (Yes, fancy scale). We're always overweight; this year, we didn't swiss cheese; we reinforced. It was amazing!

Re: How much does your robot weigh?
 

On a serious note, we are looking at 98 lbs in-bag and a ~16-lb withheld shooter, plus some minor bits and pieces, so it will probably be around 114 lbs. I don't know if we are planning to put a 6-lb weight on.

Re: How much does your robot weigh?
 

Good question...it was 110 before we added what we think was five pounds. We have a lighter appendage in the bag to fix it if there's a problem.

Re: How much does your robot weigh?
 

My team's robot wayed 128 pounds 4 days ago:eek: . We put it on a swiss cheese diet, and now it ways 119.7 pounds. We ordered plastic air tanks to replace our metal tanks which should save us 2 pounds.

Re: How much does your robot weigh?
 

Well, we guessed we'd come in around 100 lbs. Upon putting the Radiologist on our trusty bathroom scale, we were all stunned to see a weight of 115 lbs.

No worries. Still under weight, just surprising.

Took a few hours of sleep for a student to point out that no one had noticed that we had failed to remove the battery!

Looks like we'll be around 105 lbs. or so.

- Mr. Van
Coach, Robodox

Re: How much does your robot weigh?
 

122 lb, we are planning on swiss cheesing the giant half inch thick tensioner plate we have on the robot.

Re: How much does your robot weigh?
 

no it does not. at the Seattle competition they are very picky.. last year 120.1 pounds we took off .3 pounds of material(with 3 inspectors watching us) then weighed it again at 120.3 pounds. missed two matches...........................

Re: How much does your robot weigh?
 

When we weighed we were around 121-124.

Re: How much does your robot weigh?
 

2757 Was at 93 before we put it in the bag... I guess we are adding more things at our first regional! :O

- Andrew