pic: Wooden Thunder, Team 1294

[Rick TYler]

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[elknise]

I saw your robot at the practice competition in Bellevue. You had a nice looking bot and it seemed to drive and handle nicely. Great Job.

Unfortunatly for us, Issaquah, we found out our robot was 14 pounds heavy, but we still had fun.

Hope to see you at the Pacific Northwest Regional in Portland.

[Chris Fultz]

Nice job, 1294.

You are making great use of the materials you have.

Good luck -!

[JamesCH95]

Props to you! Wood is a material very dear to my heart, but this is the first year our team hasn't used it. Looks like a solid bot, good work.

[Alaina]

It's...so...beautiful!!!!
I love wooden robots! The most successful robot my team ever built was made of wood. But we haven't used wood for the past 2 years. I miss working with wood. =(

[george56]

NICE ROBOT! its very old-school to use wood. (not that tahts a bad thing ) looks pretty solid though.

Good Luck at the competitions!!

[Rick TYler]

If we had a fully-equipped machine shop we might have gone that route, but we work in a woodshop and don't have a lot of money for paying someone else to do welding and machining, so we had to choose between wood and bolting together stock aluminum bits. My hobby is woodworking and I built a couple of sample components to show the students that wood can be light, stiff and strong if you design around its strengths. (For example, an 8-foot 2x4 weighs around 10 pounds. For comparison, a piece of solid aluminum stock a little over 1" square would weigh around the same -- but it would bend a lot easier. Of course, you wouldn't use solid aluminum bar stock, but we didn't use 2x4s either.)

Our towers are I-beams with 4-inch webs glued into .25-inch-deep grooves in the 2-inch wide flanges. We used zero-void 1/2-inch Meranti plywood. The two towers are joined by glued-and-screwed plywood panels for stiffness, and, frankly, to give us a big flat surface to decorate on the front. Blocks of pine are glued into the I-beams wherever we wanted to attach braces or the bearings for the arm mechanism. The bearings are captured by holes drilled into the insides of the pine blocks.

The electrical systems are mounted on 1/2-inch construction plywood and the tetra-gripping system is mounted on 1/2-inch construction plywood reinforced in key places with a second layer glued into place. If we hadn't been in such a hurry, we would have used 12mm Baltic Birch plywood.

The robot was built undersized to allow us to attach a bumper system within the 28x38 inch limit. To make sure we stayed within the box, we milled 1.25 inch side bumpers out of fir. The robot was a little too close to 38 inches to use this on the front and back, so we substituted 4/4 red oak. The corners are reinforced with heavy steel strapping usually used as a construction brace.

By the way, in the photo above, the tetra is being held over the back of the 'bot. We score on the other side.

Just thought you might be interested in some of the details of our Old School technology...

[elknise]

Why did you make your robot smaller to accomodate bumbers? Acording to R30 in 5.3.4 The Robot, Bumpers may extend outside the normal robot starting dimensions (in the horizontal plane) up to 4.” per side.

[Rick TYler]

Originally Posted by elknise

Why did you make your robot smaller to accomodate bumpers? Acording to R30 in 5.3.4 The Robot, Bumpers may extend outside the normal robot starting dimensions (in the horizontal plane) up to 4.” per side.

My bad. "Bumpers" in FIRST land are allowed to extend past the maximum size, but they have to be soft and removable for weighing and measuring. We were somewhat concerned about 130+ pound robots moving at 15fps smashing into our nice aluminum side rails, so we gave up the "free" soft bumpers in exchange for solid support for the rails.

This paid off in the Bellevue trial event when one of our own teammates smashed into our side. There is a 1/4-inch chunk missing from the side beam, but no damage was done to anything else.

[elknise]

Yeah it was really rough there, robots got stuck in our arm twice and that little one without an arm was just all over the place.

[Gabe Salas Jr.]

Wow, nice craftsmanship. Did you guys experiment with different types of wood such as Mohagany or Red Wood before settling on a couple of specific types of wood for the overall robot design? Was there another reason for choosing wood for the robot design besides not having a machine shop readily available?