3v0 said:It is ambitious, especially on the cheap. Both help make the project interesting.
If there was a physics class I would be teaching it!I am more worried about repeatability then getting enough power out of an pneumatic system. If I have to I can put 100+ psi in a 20lb propane tank. One of the advantages of making the robot large. Balls weight about 600mg or 20 oz. For me style does not matter. Maybe it will to the basketball coach?
I may get some local help but the kids/school hit the locals up so frequently that I only plan to take was is offered without asking. The goal is to not spend a lot of anyone's money. It would be a lot faster to buy things like the H-Bridge and such we can make them for a lot less. Since we have not motors at this point thinking about the H-Bridge is getting ahead. It would be great to find an electric wheelchair. In the end we will use whatever can be made to work.
Monday we are scheduled to give a short presentation to the school board. Mostly the kids will talk about what they learned and demo their little Walter class robots. I may be able to talk to the board about the idea after the presentation.
A quick check of the web did not provide anything that was useful. One school started out to build a similar robot with a 6K budget, They ended up with one that launched T-shirts into the crowd. Did they wimp out? Do not know.
Have a look in your local junkyard at windshield wiper motors. Dirt cheap, lots of power and all geared down already. Since you're using lead-acids, they'd be a good possibility. Worth a look anyway.3v0 said:Since we have not motors at this point thinking about the H-Bridge is getting ahead. It would be great to find an electric wheelchair. In the end we will use whatever can be made to work.
Marks256 said:why not make something like this? Except re-engineer it to use basketballs instead. Also, it will have to shoot it in the air at the right angle and velocity.
**broken link removed**
EDIT:
Also, how do you get free lead acid batteries?
Let us now look specifically at a free throw. A free throw, just like any other shot, has the best chance of going in the more arc the shot has. When the ball comes straight down it makes the rim seem bigger than when a shot has more of a straight trajectory. Therefore, the most ideal shot would be one that comes nearly straight down into the basket; however, when shooting that type of shot it is nearly impossible to aim.
Krumlink said:The robotics team has used a launcher like this before with great results. It was on the 06 robot, and it could fire 20-45 balls per minute, and was configured so it could autonomously aim with the CMU camera.
This sounds like a possibility.Mike said:Try to get a look at a clay target launcher.
Krumlink said:Why not use a ball launcher that you make? Just have a top wheel and a bottom bike wheel or something and have the bottom one with a big motor on it. I can maybe get you some stuff, gotta ask robotic's team (motors, wheels, etc)
Gosh I see your point.Pommie said:That basket ball has gone from 600mg to 600Kg in less than half a day. A factor of just 1 million. I'm guessing it actually weighs 600 grams = 1 and a bit pounds.
Mike.
I meant to drive the robot. Obviously they're way too low geared to fire a ball.3v0 said:Futz: I love using old car parts but I do not think a wiper motor wold have the torque to toss the ball. It would work if it was used to spin up a flywheel.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?