1706 Shooter Reveal

[carpedav000]

WOW, and we thought our spring shooter was ridiculous!

We did the math as well and got a number closer to 200lbs @ 5" of compression, so with an extra 400lbs and inch of compression I can safely assume this thing shoots EXPONENTIALLY harder than ours! Good job

[Ether]

Originally Posted by carpedav000

We did the math as well and got a number closer to 200lbs @ 5" of compression, so with an extra 400lbs and inch of compression I can safely assume this thing shoots EXPONENTIALLY harder than ours!

If you're both using springs it's probably closer to linear (if you're talking about force) or a power function (if you're talking about energy).

[dwodrich]

Originally Posted by Ryan Dognaux

Like the power! We prototyped something similar for a linear puncher. Any ideas on how you'll get the ball into it intake-wise?

We don't have a cool cord system like yours, just rollers on top. Then we won't take the ball into the robot just hold it with the intake. Then we get the intake out of the way or we launch it through the goal.

[anishde]

I can see it now - THE TOWER FIGHTS BACK.
The boulder flies into the high goal...and ricochets back out.

[squad1706]

Ok, things to fix!

Most important, our shooter is actually more in the neighborhood of 200lbs of force. I had in my mind that the spring was a 750, when it was really a 375. So, not nearly as much power as in the video or as stated.

[philso]

Originally Posted by Brandon Holley

While in general I agree with your sentiment about safety - I do think the word 'overpowered' could be a bit of a leap if there goal was to fire the ball in as straight a line as possible. Maybe this is their goal...

-Brando

How straight does it need to be? At some point, one passes the point of diminishing returns. A mechanical failure in a mechanism with that much stored energy is not very funny.

[MARS_James]

Originally Posted by squad1706

Ok, things to fix!

Most important, our shooter is actually more in the neighborhood of 200lbs of force. I had in my mind that the spring was a 750, when it was really a 375. So, not nearly as much power as in the video or as stated.

Based on seeing the video, I have one piece of advice, make sure your autonomous coding and driver/shooter skills are on point. I bring this up because this robot can only ever accidentally shoot a volunteer once before a head ref is going to have the "if it ever happens again your robot will be considered unsafe" conversation

[squad1706]

Originally Posted by MARS_James

Based on seeing the video, I have one piece of advice, make sure your autonomous coding and driver/shooter skills are on point. I bring this up because this robot can only ever accidentally shoot a volunteer once before a head ref is going to have the "if it ever happens again your robot will be considered unsafe" conversation

Very true. What I meant in that statement that you quoted me in was sort of misleading. Yes, we are aware this is a design that has ALOT of power. We are also making sure that this device will be safe, accurate, and stable as well. We have never had this device launch in an unsafe way, and will continue to make sure it doesn't.

Thank you for your concerns though, as this is a design with many posibilities for malfunctions.

[Munchskull]

Can I borrow that? My school is having a dodge ball tournament tomorrow and my friend has dibs on our shooter.

[MaGiC_PiKaChU]

We have a similar concept... but yours sounds like war machine when it shoots

[jodge1706]

Originally Posted by Ryan Dognaux

Like the power! We prototyped something similar for a linear puncher. Any ideas on how you'll get the ball into it intake-wise?

We do, using rollers, it will suck the ball into the front of the shooter where the ball is housed. This rollers will actually move to get out of the way of the shooter whenever we don't need them anymore. So the intake will be attached to the arm that holds our shooter.

[IronicDeadBird]

Originally Posted by RoboChair

You might find the following historical articles of interest for researching more naming opportunities.

https://en.wikipedia.org/wiki/Catapult
https://en.wikipedia.org/wiki/Ballista
https://en.wikipedia.org/wiki/Petraria_Arcatinus (bow powered stone thrower)

Don't forget this!

https://en.wikipedia.org/wiki/Gastraphetes