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-   -   1706 Shooter Reveal (http://www.chiefdelphi.com/forums/showthread.php?t=143627)

carpedav000 11-02-2016 17:10

Re: 1706 Shooter Reveal
 
WOW, and we thought our spring shooter was ridiculous! :eek:

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 ::safety::

Ether 11-02-2016 18:09

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by carpedav000 (Post 1538754)
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 11-02-2016 19:14

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by Ryan Dognaux (Post 1538705)
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 11-02-2016 21:36

Re: 1706 Shooter Reveal
 
I can see it now - THE TOWER FIGHTS BACK.
The boulder flies into the high goal...and ricochets back out.

squad1706 11-02-2016 23:30

Re: 1706 Shooter Reveal
 
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 12-02-2016 00:05

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by Brandon Holley (Post 1538669)
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 12-02-2016 11:21

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by squad1706 (Post 1538937)
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 12-02-2016 11:42

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by MARS_James (Post 1539116)
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 12-02-2016 12:43

Re: 1706 Shooter Reveal
 
Can I borrow that? My school is having a dodge ball tournament tomorrow and my friend has dibs on our shooter.

MaGiC_PiKaChU 12-02-2016 14:51

Re: 1706 Shooter Reveal
 
We have a similar concept... but yours sounds like war machine when it shoots :eek:

jodge1706 12-02-2016 20:17

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by Ryan Dognaux (Post 1538705)
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 13-02-2016 21:19

Re: 1706 Shooter Reveal
 
Quote:

Originally Posted by RoboChair (Post 1538635)
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


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