How far are people shooting?

[Alan Anderson]

The first actual frisbee shots from the TechnoKats' frisbee shooter went about 20 feet into a mentor's hands. Consistently.

After tweaking some speeds and wheel placement, it'll regularly send frisbees the full length of the field, starting at about hip level and hitting the tarp behind the goals on a still-upward trajectory. Consistency suffers ever so slightly at that distance. I doubt that'll be the team's strategy during matches, but it's fun to see it working so well.

Whether it works that well on a driveable robot remains to be seen.

[dchartley]

We are going to go for the full court shot, probably at the larger target. Our Team developed a 3 wheel system using 2 wheels on the horizontal plane that are belted together and run direct drive off a single CIM and single wheel in the vertical plane that runs direct drive off another CIM. Top wheel is mounted slightly to left of center. Velocity is running over 30 fps and is flying flat and stable. Probably going to have to make some hefty guards for the fast spinning wheels in case of failure.

Doug

http://youtu.be/i4LRvcwTFEA

[DanielCH]

Originally Posted by Alan Anderson

The first actual frisbee shots from the TechnoKats' frisbee shooter went about 20 feet into a mentor's hands. Consistently.

After tweaking some speeds and wheel placement, it'll regularly send frisbees the full length of the field, starting at about hip level and hitting the tarp behind the goals on a still-upward trajectory. Consistency suffers ever so slightly at that distance. I doubt that'll be the team's strategy during matches, but it's fun to see it working so well.

Whether it works that well on a driveable robot remains to be seen.

If it's not confidential, would you mind explaining why that wouldn't be your primary strategy during a match?

45 shots into the 3 point goal, even at 75% accuracy, is over 100 points by my calculations -- you could single handedly outscore three top level climbers, even without points you could make in autonomous or climbing.

It seems quite ideal, assuming your motors can hold up against 45 shots in 120 seconds.

[MrForbes]

Originally Posted by DanielCH

45 shots into the 3 point goal

I think 45 frisbees won't physically fit into the 3 point goal?

[MichaelBick]

Originally Posted by DanielCH

If it's not confidential, would you mind explaining why that wouldn't be your primary strategy during a match?

45 shots into the 3 point goal, even at 75% accuracy, is over 100 points by my calculations -- you could single handedly outscore three top level climbers, even without points you could make in autonomous or climbing.

It seems quite ideal, assuming your motors can hold up against 45 shots in 120 seconds.

If somebody can do this while trying to shoot over an 84" tall robot 3 feet away I will be impressed. Remember it only takes 1 small pole in front of that shooter to mess up that strategy.

[JohnSchneider]

Originally Posted by MICHAELABICK

If somebody can do this while trying to shoot over an 84" tall robot 3 feet away I will be impressed. Remember it only takes 1 small pole in front of that shooter to mess up that strategy.

also to not that only 1/3 feeder slots is protected

Originally Posted by animenerdjohn

also to not that only 1/3 feeder slots is protected

I believe 2/3 are protected, and 1/3 (the one next to your opponent's 1pt goal) is unprotected.

[DanielCH]

Originally Posted by MrForbes

I think 45 frisbees won't physically fit into the 3 point goal?

How do you figure that? I'm not sure, but at this field drawing, page 69/146, it appears that the high goal has a bin that is 26 inches down, 54 inches across, and 22.5 inches deep below the gap for the goal.

That's 31,590^3 inches for Frisbee to fall into, and assuming a Frisbee is 11 inches long and wide, and 1.4 inches tall, one Frisbee is ~169^3 inches. 45*169^3=7,623^3 inches.

I could have easily made an error in my calculations, or interpretations of the field drawings, but it seems to me as if 45 Frisbees would fit into the high goal without much issue.

Originally Posted by MICHAELABICK

If somebody can do this while trying to shoot over an 84" tall robot 3 feet away I will be impressed. Remember it only takes 1 small pole in front of that shooter to mess up that strategy.

That's definitely something to take into consideration, and a strategy my team is considering employing as a backup tactic, but if you could either

1) Pop a few Frisbees off before a defender comes around, and then head off to your pyramid for protected shooting, or

2) In the event your opposing alliance has a combination of immobile/shooting only/climbing only robots, use this strategy.

We believe we will be making quick and accurate shots from around 36 feet away from the targets.

[DampRobot]

We are shooting into the goals. It isn't shooting far that counts. It's scoring points.

[MichaelBick]

Originally Posted by DanielCH

1) Pop a few Frisbees off before a defender comes around, and then head off to your pyramid for protected shooting, or

2) In the event your opposing alliance has a combination of immobile/shooting only/climbing only robots, use this strategy.

I'd be worried about 1 because the first thing I think most alliances will do will be to send a defender to block the best scorer on the opposing alliance. It may very well turn into a battle of drivetrains where the best shooter from each alliance immediately races to the feeder station and another robot from each alliance races to block them.

[Bochek]

Originally Posted by DonRotolo

No wheels? Care to elaborate? Sounds fascinating.

We are using a belt. Surface speed of about 200 km/h (120mph).

[MrForbes]

Originally Posted by DanielCH

How do you figure that? I'm not sure, but at this field drawing, page 69/146, it appears that the high goal has a bin that is 26 inches down, 54 inches across, and 22.5 inches deep below the gap for the goal.

That's 31,590^3 inches for Frisbee to fall into, and assuming a Frisbee is 11 inches long and wide, and 1.4 inches tall, one Frisbee is ~169^3 inches. 45*169^3=7,623^3 inches.

I could have easily made an error in my calculations, or interpretations of the field drawings, but it seems to me as if 45 Frisbees would fit into the high goal without much issue.

It looks like you're right, thanks.

This idea is looking better and better.

[JB987]

Originally Posted by MICHAELABICK

If somebody can do this while trying to shoot over an 84" tall robot 3 feet away I will be impressed. Remember it only takes 1 small pole in front of that shooter to mess up that strategy.

Even a cheap, very lightweight pvc pole or two fixed at 10-12" apart and 60" high can shut down a long shooter extremely well while still giving a bot full field access. Installed for inspection, the "apparatus" could be used (or not) depending on the opponents faced in each upcoming match. Any marginally offensive robot or defensive robot should at least consider the option.

[wireties]

Originally Posted by JB987

Even a cheap, very lightweight pvc pole or two fixed at 10-12" apart and 60" high can shut down a long shooter extremely well while still giving a bot full field access. Installed for inspection, the "apparatus" could be used (or not) depending on the opponents faced in each upcoming match. Any marginally offensive robot or defensive robot should at least consider the option.

great idea!

we can throw the discs almost 40' with a 1-wheeld shooter prototype but our 2-wheeled prototype (that uses motors we can use on the robot) sucks - so far