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-   -   shot from the bridge (http://www.chiefdelphi.com/forums/showthread.php?t=104886)

akmess01 21-03-2012 07:30

shot from the bridge
 
During its second match on Saturday morning, FIRST Team 3824 balanced
on the Blue Alliance bridge, then hit a 3-point shot from the bridge! I was wondering if any other team had accomplished this at a regional yet.

Jared Russell 21-03-2012 07:36

Re: shot from the bridge
 
1218 has accomplished this as well. It sure is a crowd pleaser!

jvriezen 21-03-2012 08:03

Re: shot from the bridge
 
Quote:

Originally Posted by akmess01 (Post 1147190)
During its second match on Saturday morning, FIRST Team 3824 balanced
on the Blue Alliance bridge, then hit a 3-point shot from the bridge! I was wondering if any other team had accomplished this at a regional yet.

We didn't do that, but we did do a double shot, launching two balls from beyond half court scoring 3+1... check it out:

http://www.youtube.com/watch?v=i2KIVicKIOk

Taylor 21-03-2012 08:03

Re: shot from the bridge
 
I saw 1024 do this a couple times - once during hybrid mode!

Brian Ha 21-03-2012 08:28

Re: shot from the bridge
 
It was either 494 or 70 who did it week one during kettering. It was a qual match, it was pretty cool.

Dad1279 21-03-2012 11:25

Re: shot from the bridge
 
1279 did it once at NYC

Wayne TenBrink 21-03-2012 12:07

Re: shot from the bridge
 
1918 hit a one pointer while balanced on the co-op bridge at West Michigan. It bounced off one or two other baskets before deciding to go through. A crowd pleaser, but it didn't affect the outcome of the match.

JesseK 21-03-2012 13:30

Re: shot from the bridge
 
We kept trying to do it from the coop bridge, but we couldn't get the durn opponents to cooperate and balance. We're going to try again in DC & Champs.

Craig Roys 21-03-2012 13:32

Re: shot from the bridge
 
We hit a 3-pointer from the coopertition bridge and the announcer (who happens to be a mentor on our team) thought it came from a human player which almost got us a foul since it happened before 30 seconds. Luckily, one of the refs saw that it came from our robot and let the other refs know. We have a GoPro camera mounted in front of our shooter wheels for Bot-Cam footage - it's a fun one to watch. We tried it a couple of other times but with no success.

axel_grease 21-03-2012 16:05

Re: shot from the bridge
 
2557 made 2 2-point shots during match 65's end game in the Portland Autodesk Regional.

LeelandS 21-03-2012 16:31

Re: shot from the bridge
 
I have seen a few teams pull it off! I think I saw a couple Michigan teams hit it over the previous few weeks. I guess most of them have already commented on the thread.

I really thought (and I'm sure after Garrick sees this he'll tell me he told me so) that bridge shooting, or "ramp-camping" as I and a few members of my team affectionately dubbed it, would be a lot more common.

It just seemed to me that if a team designed for a quick balancing robot, and a long range shooter, they could have done something very effective. They'd be undefendable most of the time (while on the bridge and in the lane), be able to quickly collect balls from either side of the field, and be ready for end game whenever their partners (or opponents, I guess) were.

It just seemed to me like it would have been a great challenge to design for. My team assured me that it would simple by too difficult.

JesseK 21-03-2012 17:04

Re: shot from the bridge
 
Leeland it is difficult to do consistently without copious calibration. If shooter speed is held constant and launch angle is varied, then the margin of error is ~1.8 degrees. If launch angle is held constant and shooter speed varies, the launch exit velocity has a margin of error of an estimated 0.3 ft/s. This assumes left/right is aligned properly as well and doesn't apply to backboard shots. This also assumes that the ball(s) shot from the bridge matches 'squishiness' of the ball(s) used for calibration.

I think it's like human player baskets this year -- of the many attempts, a relative few will score points.

LeelandS 21-03-2012 17:10

Re: shot from the bridge
 
Quote:

Originally Posted by JesseK (Post 1147454)
Leeland it is difficult to do consistently without copious calibration. If shooter speed is held constant and launch angle is varied, then the margin of error is ~1.8 degrees. If launch angle is held constant and shooter speed varies, the launch exit velocity has a margin of error of an estimated 0.3 ft/s. This assumes left/right is aligned properly as well and doesn't apply to backboard shots. This also assumes that the ball(s) shot from the bridge matches 'squishiness' of the ball(s) used for calibration.

I think it's like human player baskets this year -- of the many attempts, a relative few will score points.

Oh, I definitely understand it would be a crazy thing to pull off. I'm just surprised I haven't seen more teams try to implement it.

jdunston94 21-03-2012 19:25

Re: shot from the bridge
 
what are the rules on having a go pro camera on the robot?

Craig Roys 23-03-2012 07:39

Re: shot from the bridge
 
Quote:

Originally Posted by jdunston94 (Post 1147516)
what are the rules on having a go pro camera on the robot?

It's considered decoration unless you try to actually connect it to your control system.


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