"It will be close."

:)

We are under 100 pounds!!!!!!!!

Right now we are at 122. We will probably add the extra eight pounds with a cooling system for our drill motors and a wire mesh on our box-killer arm so we don't get caught in the boxes again.

We guesstimated that the robot would be between 92 and 100 lbs about a week ago. We weighed everything yesterday and came up with 112. Today we changed the cover, altered some things, and came up to 120. Eh... I still want lead weights...

Umm...
 

I hope that was a joke because titanium is considered an "exotic material" and is not allowed on robots this year.

Robot Weight
 

We are actually underweight... 112 LBS. So, we added a couple things, since our "coach" wants us to be at exactly 130 LBS, nothing over, nothing under.

Re: Umm...
 

why do you think he posted the winking smiley? Jeez, some people here tak e everything waaaaaaaaaaaaaay to seriously.

As of tonight we are 128.6, mechanism(s) attached, nothing mechanical to add.

We have a method for weight reduction. We lost 5lbs before we finalized a design or put two pieces together. You'll just have to wait and see what we did. If you won't see us, I'll post autocad drawings on the 1st.

We are at 125, with a couple little things still to add (diamond plating for the front/rear, stickers, and some lexan for the top)...So we'll prolly end up around 128-130

At the weight limit and with everything working/everything on... it's very nice and incredibly satisfying to be able to have 5 days of driver practice with everything working.

we are around 120 i think...
It was nice that for once we didn't have to rid ourselves of 10-20 pounds of weight.

On Monday we came in at about 150-155 (:ahh:). I have come to hate 80/20, it is soo heavy, our team has come in very overweight every year we have used it.

Fortunatly right now we are replacing 80/20 with square tube which is about half the weight per length. The drivetrain also has some excessivly large plates with much potential for the bandsaw weight reduction plan. I think we'll make it...

last year we had to cut about eight pounds we used bosch extrusion and totally filled out the 30x36x60 space alotted. So we comenced to drill holes in everything from axles to under the robot and motor controllers.

This year however we were under and had to add 20 to 30 pounds of lead and solder weights on the lower front members. We used 2x2 and 1.5x1.5 box section, 1.5x1.5 angle and lots of sheet aluminum for mounts and things. even with all that weight we can still do wheelies if we try. We also welded almost everyhting up that we could which saved us about 10-15 pounds of nuts and bolts.

Tips for lightening up:
- All sold axles can be drilled out or replaced with 3/32" wall tubing. Believe you, me it's plenty strong enough.
-Instead of using plate and heavy sheet metal for mounts. Take thin aluminum sheet metal and just bend up the side to form a little box is really easy and EXTREMELY strong.
- any electornics that have four bolt holes only need to bolts on opposing corners.
- There is a 4x4 square section of prime area to be lost under the controller and at least a 2x2 area to be lost under each speed controller.
-If you first bolted up your frame see if you can get it welded it's well woth the weight savings and don't bother to fill in the bolt holes with weld if at some time during the competion your weld brakes or cracks just put the bolt back in. however in a good weld the parent material that you are welding should brake first not the weld.

good luck,

when we took our robotch to be weighed it was jumping between 130-131 (most large freight scales round to the nearest lb) but then we rememberd to take off the bungee cord holding our parts on.
then it came back to 130 and we cheered.

At one point we were over by as much as 21 lbs!!!!!!!!!! Luckily we were able to chop off about 19-20 lbs( though it really affects are capabililites) so we really only need to drill about a pound or 2 off at regionals. :ahh: