Go to Post everyone in FIRST has to do the cha cha slide at least once per season to get it out of their system. Now I can go back to doing it in the privacy of my own car (if you see a red Jeep in CT swerving back and forth don't worry, it's just me doing the slide...)! - KathieK [more]
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  #46   Spotlight this post!  
Unread 13-01-2017, 09:27
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Re: Gears on the floor?

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Originally Posted by Michael Hill View Post
But seriously, I'm more worried about getting called for herding when there's a stupid gear in the way.
This is my concern. Especially since it's looking like a lot of bumpers are going to be mounted super low this year.
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Unread 13-01-2017, 10:49
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Re: Gears on the floor?

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Originally Posted by mrnoble View Post
Having an intake for floor gears is the only way to get a 120 point autonomous. That's maybe a decent reason to pursue it. Maybe.
You want a solo 120 point auton? Not only is there another way, it's far easier.
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Unread 13-01-2017, 11:02
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Re: Gears on the floor?

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Originally Posted by TJP123 View Post
You want a solo 120 point auton? Not only is there another way, it's far easier.
Plus even if you wanted to accomplish it with gears, there's at least one previous Einstein robot that loves to ruin the "you can't do that unless you design for floor pickup" argument, including having successfully run non-preloaded autonomous routines (two ubertubes in 2011 by 1503).
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Unread 13-01-2017, 11:31
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Re: Gears on the floor?

There is a LOT of conjecture in this thread, and no one has provided photos or other evidence from experiments at the human feeder station. I won't provide ours, but rather, encourage teams to do MANY of their own with every game piece that can come out of the station. 2013 "kind of" applies, but there was only 1 type of game piece so it was easy to prevent. Same with 2015, unless your human players made huge mistakes.

Also, like usual, the team field drawings are missing a critical component that mimics the real field: the wall goes straight down from the feeder station. There is no recess. This is important for your experiments.

There will be a lot of miscommunication between a drive team and the human player that is 50 feet away, behind 1-2 airships, and also has 2 panes of semi-reflective plexiglass between them. Gears will fall on the ground.

If you want to be an all-around bot that mimics the Ri3D teams' gear intakes, then don't do the experiments and don't worry about gears on the ground. It is likely the (apparently exceedingly rare) great gear bots will form an alliance without you.
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Unread 13-01-2017, 12:49
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Re: Gears on the floor?

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Originally Posted by JesseK View Post
There will be a lot of miscommunication between a drive team and the human player that is 50 feet away, behind 1-2 airships, and also has 2 panes of semi-reflective plexiglass between them. Gears will fall on the ground.
That's true, but that's pretty well solved with a camera and driver practice.

The gear active intake as a whole really comes down to an individual team's strategy. Having an active gear intake + having a decent shooter/hopper system/climber with a potential ball intake on that makes the space allowable within the volume limits difficult. A Ri3D style gear intake is smaller than most active gear intakes and allows much more space on the robot if a team's plans are to do multiple objects.

Just things to think about when planning your own team's strategy.
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Unread 13-01-2017, 12:53
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Re: Gears on the floor?

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Originally Posted by TJP123 View Post
You want a solo 120 point auton? Not only is there another way, it's far easier.
What do you mean? Can you achieve that without a pick up system?
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Unread 13-01-2017, 13:07
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Re: Gears on the floor?

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Originally Posted by ARampantBrian View Post
That's true, but that's pretty well solved with a camera and driver practice.
Camera will be effectively used on ~10% of robots. Drive practice, maybe 20%.
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Unread 13-01-2017, 13:14
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Re: Gears on the floor?

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Originally Posted by ARampantBrian View Post
A Ri3D style gear intake is smaller than most active gear intakes and allows much more space on the robot if a team's plans are to do multiple objects.

Just things to think about when planning your own team's strategy.
2017 has had a weird start for me, so maybe I'm just seeing things differently. This year, above all other years, is not the year to do both primary scoring objectives for 99% of teams.

I can't understand why any team would risk not getting bonuses, or why they would presume that its ever a guarantee an average alliance of 3 gear bots can pull it off. Conditions on the field will be chaotic by mid-match.

Sure, active intake from the ground is optional. But the Ri3D intakes from the feeder are grossly inadequate for all but the earliest levels of play.
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Unread 13-01-2017, 13:17
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Re: Gears on the floor?

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Originally Posted by GuyM142 View Post
What do you mean? Can you achieve that without a pick up system?
One way I can think of is to find a way for partners to dump their gear into your very-forgiving non-ground pickup. Yet it would take getting your partners to play along with both a simple dumping mechanism and custom autonomous code.

Maybe there are more ways to do it. In any event it's a bit of inter-robot complexity for a net gain of 20 points.
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Unread 13-01-2017, 13:21
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Re: Gears on the floor?

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Originally Posted by GuyM142 View Post
What do you mean? Can you achieve that without a pick up system?
1 gear plus 60 fuel = 120 points and doesn't count on picking up two gears (one at a time) and delivering them with enough time for the pilot to do their job.

There might be five teams in the world that can accomplish this, but by my estimate that's about 5.03 times as many teams as can accomplish a 3-gear auton.
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Unread 13-01-2017, 13:25
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Re: Gears on the floor?

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Originally Posted by JesseK View Post
One way I can think of is to find a way for partners to dump their gear into your very-forgiving non-ground pickup. Yet it would take getting your partners to play along with both a simple dumping mechanism and custom autonomous code.

Maybe there are more ways to do it. In any event it's a bit of inter-robot complexity for a net gain of 20 points.
In that case why wouldn't you just have both the robots just place a gear on the lift themselves? 65 points X 2. Theoretically all three robots could do it.
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Unread 13-01-2017, 13:55
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Re: Gears on the floor?

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Originally Posted by GreyingJay View Post
In that case why wouldn't you just have both the robots just place a gear on the lift themselves? 65 points X 2. Theoretically all three robots could do it.
Multiple robots placing a gear on the peg in auton isn't easy. For dead reckoning, there is approximately +/- 0.75" of margin of error left/right after a robot drives. One team only has to drive 4 feet. The other two teams have to drive approximately 6-8 feet and also possibly turn.

You may say 'just use vision', but it is rarely that simple.

I predict that multiple gears in auton will be as rare as any tower-scoring autons were in 2016. In some regions of the country it will be more common than others - but compared to 2014 and prior autonomous routines it will be very rare.
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Unread 13-01-2017, 14:01
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Re: Gears on the floor?

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Originally Posted by JesseK View Post
Multiple robots placing a gear on the peg in auton isn't easy. For dead reckoning, there is approximately +/- 0.75" of margin of error left/right after a robot drives. One team only has to drive 4 feet. The other two teams have to drive approximately 6-8 feet and also possibly turn.

You may say 'just use vision', but it is rarely that simple.

I predict that multiple gears in auton will be as rare as any tower-scoring autons were in 2016. In some regions of the country it will be more common than others - but compared to 2014 and prior autonomous routines it will be very rare.
Yeah, I agree, but I think that would be far more likely than the "I'll place one gear and then you pass me another one and I'll place that one too" scenario that was described above.

It is a fun and clever thought experiment: set up your robot such that in auto it situates itself on the field adjacent to the airship and presents a peg to another robot that thinks it is placing its gear on the center peg.

The more productive goal will likely be: place the gear, run to a hopper, dump it, shoot high goals until time runs out.
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Unread 13-01-2017, 14:07
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Re: Gears on the floor?

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Originally Posted by GreyingJay View Post
Yeah, I agree, but I think that would be far more likely than the "I'll place one gear and then you pass me another one and I'll place that one too" scenario that was described above.

It is a fun and clever thought experiment: set up your robot such that in auto it situates itself on the field adjacent to the airship and presents a peg to another robot that thinks it is placing its gear on the center peg.

The more productive goal will likely be: place the gear, run to a hopper, dump it, shoot high goals until time runs out.
I get it. Was just thinking about how a team could 'solo' 120 auto gear points though. The peg->hopper->vomit-balls-and-pray route seems a little far-fetched because of how long the actions could take (including time of flight - you can't just line-drive into the high goal like prior years). If there were 1 partner that could place on a side lift, and a team had a method to sense gears on the ground, then a 2-bot/3-gear auton seems more plausible.
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Unread 13-01-2017, 14:09
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Re: Gears on the floor?

Here's my opinion on floor pickup for gears: At many events, there is going to be sub-par gear robots that are going to drop gears. Depending on how much this happens, you could easily loose a match to not being able to pick up dropped gears. If you are a robot focusing on gears, it's a safe assumption that you are trying to be one of the best gear robots at the event and probably want to seed high. To do this, you are going to need a floor intake to make sure you can score a consistent amount of gears and not rely on alliance partners if they malfunction or just can't handle the gears reliably.
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