Motor Used for Shooting

[roystur44]

Originally Posted by Ether

Reading between the lines, it sounds like you are not planning to control wheel speed, is that right?

Since the target is a hole in the wall and not a hoop. I think getting your shooter to have a fairly straight trajectory is needed. Let the motor rip and throw a fastball into the hole. It's all about aiming.


Roy

[CalTran]

Originally Posted by roystur44

Since the target is a hole in the wall and not a hoop. I think getting your shooter to have a fairly straight trajectory is needed. Let the motor rip and throw a fastball into the hole. It's all about aiming.


Roy

So what's your plan if your battery runs low, or (hopefully not) you forget to switch it between rounds? Pray that it still makes it?

[Ginger Power]

Originally Posted by CalTran

So what's your plan if your battery runs low, or (hopefully not) you forget to switch it between rounds? Pray that it still makes it?

"Letting the motor rip" could still mean controlling for voltage fluctuations. Just gear your shooter such that at 80%-85% speed you're still shooting much harder than you need to.

[billbo911]

We have have exceptional results with our prototype using a single RS 775-18 geared 2:1 driving a pair of 4" wheels. We run the motor anywhere between 8.5v and 10v.

Our intent is to run a pair of 775pro's geared 3:1 (60:19 to be exact) and (This is for you, Ether) Bang-Bang to control the rate of the wheel.
Our plan is to use a single retro reflective section and just measure the period to determine the rate the wheel is spinning. We may end up with two sections to preserve balance in the wheel.

[GeeTwo]

Originally Posted by roystur44

Since the target is a hole in the wall and not a hoop. I think getting your shooter to have a fairly straight trajectory is needed. Let the motor rip and throw a fastball into the hole. It's all about aiming.


Roy

Our target was to have the ball traveling nearly horizontally through the goal, to increase the goal's effective cross section. This isn't feasible with the bumpers over the outer works. We'll probably have two good ranges for shooting, one on the way down (at the outer works, when a defender is active) and one on the way up (near the batter, preferred if no defender present). This trajectory will also give us a rather high launch angle, which should be better to get over defending robots.