View Single Post
  #2   Spotlight this post!  
Unread 04-01-2014, 17:55
Retired Starman Retired Starman is offline
Registered User
FRC #3573 (Ohms)
Team Role: Mentor
 
Join Date: Jan 2009
Rookie Year: 2003
Location: Stone Mountain, GA
Posts: 159
Retired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud ofRetired Starman has much to be proud of
Re: 2014 Field Build

We built an entirely different version for the Peachtree Regional Kick Off. Ray built a truss out of plywood, with solid plywood on all four edges, cutting out 8 in. holes along the top and bottom to reduce weight. These were built in 8 ft. sections. It looks good and appears strong enough for play.

I built the low goal our of 1 1/2 in. PVC pipe, being careful to keep the inside dimensions and ramp height the same as the regulation goal. I used PVC furniture fittings and it was quick and easy. I think it will be strong enough for real play in our off-season GRITS event. You can have all the furniture fittings you want in a couple of days ordered on;line. Just search for "PVC furniture fittings". Note that prices are all over the map, so choose your supplier wisely. I ordered enough to do four goals for $140.

We also made the high goal our of 1 1/2 in. PVC pipe. To get the curve, we heated sand in the oven to 400 degrees F and poured it in the pipe, capping the pipe with cool sand. Once the plastic softened, we pulled the pipe around a plywood form. This worked well, too.

As a practical matter, for team use, you can just put together a PVC pipe goal with the correct inside dimensions. You don't really need the curve on the end since a square end works just like the curved end as far as practice goes. Mount the PVC goal against a frame similar to what FIRST has in the plans and you are good to go. Be sure to mount it at the right height.

You can also make a truss out of PVC pipe. It won't be as strong as the real thing, or even a plywood truss, but will be good enough for practice. Design is left to the students!

Dr. Bob
Chairman's Award is not about building the robot, every team builds a robot.