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Unread 05-04-2016, 22:39
scca229 scca229 is offline
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AKA: Nate
FRC #0060
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Re: Ball bouncing out of the high Goal

Quote:
Originally Posted by lopsided98 View Post
We also ran into problems with balls bouncing out of the high goal, and for us it always happened the same way.

If we lined up just to the right of the center goal (the same thing would probably happen from the the left of the goal), the ball would hit the back corner and bounce out the right goal. I believed this happened three times in Boston, and it caused us to lose our first quarterfinal match when it bounced out during auto. This video shows what happened.
Just watching the auto shot that didn't stay in, I can see that your robot fires pretty hard. Does it also fire with a significant horizontal spin? The resolution of the video doesn't let me see if the boulder even touches the chains at all, or just hits the opposite inside of the tower and then runs along the back plastic and comes out. The chains are there to absorb some of the energy of the boulder and attempt to keep the boulder from coming in one side and bouncing out the other or coming into the center and bouncing off the back right out the center again.

My unscientific observation, after watching 314 Qual/Elim matches and ~100 practice matches field-side, is that a very hard shot causes the chains to not have time to move or absorb and actually act as a solid wall. More mass would actually cause that particular action to occur more than it does. They need to have some mass, or the boulder is going to blast right through them, but too much and they don't move at all.

That missed shot wasn't what solely lost the match. After auto, you spent 23 seconds hung up on an alliance partner and then fired two high goal shots off of the tower facade (with one low goal in between). The red alliance also missed an auto shot on high goal. Two blue robots rolled off the batter at the end. Red alliance "should" have had a capture if one bot hadn't gotten stuck on the moat. Red also fully depleted the tower but didn't breach the defenses, which I can't think I have seen first hand in any of the 3 events I've FTA'd. The score (individually and combined) for the match was a good deal lower than the 2nd match of the series. Both alliances had a cavalcade of errors to point to for how it was lost and won.
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