839A Worlds Robot Reveal - POWERPLAY
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Love the robot. What on earth is that music combo though 
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Congrats on the win at Worlds!
Well deserved!
Can you show more of the mechanism to make the discs fly?
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So, worlds are over, good job to 839A and all of Caution Tape. Our teams and I have been inspired from all the content shared over the years, canât thank you guys enough.
But I do have to ask, now that the reveal video for 839A has been released, how is that not a violation of G14? The tilting beam/ramp in the front clearly sits under the fence line by a lot and seems to go against what the blue box says for using the fence line for strategic reasons.
âHowever, strategies or mechanisms which rely solely on this type of interaction may receive additional scrutiny from Head Referees. Team should be prepared to demonstrate that these
mechanisms include design features which prevent them from crossing the Fence Line.â
The fence line is edge of the black line under the PVC pipe closest to the scoring zones. The way the kids designed their ramp, there is no way the ramp can break the edge of that line since the PVC pipe prevents the robot from moving any further forward. It is only a violation if robot breaks the fence line and passes into the 2 point. Their design is even back front the fence line with enough margin to avoid any question.
I hope that helps. Cheers.
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From this image, the robot is well across the fence line, looks to be just short of the 3d volume of the 2 point zone.
G14 states:
Contact with the Fence and / or Fence Line, including interaction with partially-crossed
Discs such as G or H in Figure 17, is expected in standard gameplay.
However, strategies or mechanisms which rely solely on this type of interaction may receive additional scrutiny from Head Referees.
Team should be prepared to demonstrate that these mechanisms include design features which prevent them from crossing the Fence Line.
This mechanism doesnât appear to work unless itâs under the fence line / bar, you can see the disks rubbing the end of the pvc pipe to keep them from going up to high
You need to separate the distinction between bar and fence line. YES the mechanism is under the bar but NO the mechanism doesnât pass the fence line. Robots only âbreakâ the fence line when they are over the 3D volume of the 2 pt zone. The kids mechanism never reaches the fence line let alone enter the 3D volume of the 2 pt zone. I hope that clears things up. The kids will likely explain more in-depth in a follow up video. Cheers.
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The first portion of G14:
Robots may only extend over the Fence Line and âbreak the planeâ of the 3-dimensional area of the 2-Point Goal Zone if they are contacting the Expansion Zone.
âAdditional scrutiny from Head Refereesâ doesnât mean itâs illegal to be under the bar, just that refs will look closely to make sure the robot isnât breaking the plane of the goal zone.
In this case the robot doesnât break the plane of the goal zone even when pushed up all the way against the bar, so thereâs no violation of G14.
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Fence Line - The black line on the Floor which runs immediately underneath and parallel to the Fence. The Fence Line borders the 2-Point Goal Zone, the Purple Contact Zones, and the purple VEX IQ parts bordering the Purple Contact Zones
Fence - The gray PVC pipe, and all supporting structures built out of VEX IQ parts, which spans the
entire width of the Field.
The bar, aka âFenceâ, sits over the Fence Line. The Fence Line is the whole width of the black stripe, not the edge that sits next to the 3d volume of 2 point zone.
Itâs the second line in that statement that i am looking at?
Team should be prepared to demonstrate that these mechanisms include design features which prevent them from crossing the Fence Line.
Not trying to go on a witch hunt here, just reading the rules
We will do a demostration about this in the follow up video. I really love the discussions.
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Here is Grant Cox explaining the mechanism.
I pretty sure you might be misinterpreting the rules. There is no way the mechanism can cross the fence line. Cheers.
the AND is crucial here⌠the robot can legally enter the âfence lineâ area and do all the scoring it wantsâŚ
it can NOT cross the 3D volume of the 2 pt zone unless in the expansion zone.
The note is basically a warning if you are over the black line/bar/fence/fence line, expect referees to give âextra scrutinyâ as they ensure that you do not cross in to the 3D volume of the 2pt zone which begins at the white edge of the square
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So maybe Iâve been interpreting the definition in the rule book the wrong way. The way it read, I took it as the fence line was the whole 1/2 inch black line, the volume of everything within it is the fence line. So is the right interpretation saying the fence line was the top of the line only next to the 3d volume of the 2pt zone?
Again, games in the past, but itâs reading between the lines to make sure we donât miss something like this in next yearâs game. For full volume, they put the red shaded borders around the supply zone and that makes things more clearer with a visual distinction versus interpretation. Guess that was what was missing from this yearâs manual. Thankfully full volume is less of a cluster than slapshot was.
The fence line is the whole black line, but being over the fence line is not prohibited by any rule - only reaching past the fence line into the 2pt goal zone is a violation of G14.
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