So Rule <SG 2> Says that Per <G 3> , at the beginning of a Match, each Robot must be smaller than a volume of 18” (457.2 mm) long by 18” (457.2 mm) wide by 18” (457.2 mm) tall. Once the Match begins, Robots may expand, but no horizontal dimension can exceed 36” (914.4 mm) at any point during the …

[image] VexTeamZ: In that case, then, the robot greatest that the robot could expand to is a circle with a diameter of 36 inches. Also tagging @kmmohn . That’s not what the rule says. Let’s take a look at the rule again: Once the Match begins, Robots may expand, but no horizontal dimension …

Your 36" diameter circlular concept is correct (but review the CAD sketch below). The referees will check expansion with a 2-point expansion checking tool: On-Field Robot Expansion Sizing Tool - VEX Robotics

Here’s a Sharpie-CAD sketch that shows how the referee will inspect. [IMG_20210602_153956665]

This is wrong, it’s actually a reuleaux shape, not a circle.

Just think like this: No two points on the robot may exceed 36 inches horizontally, as seen in the picture by @kmmohn . No need to make things complicated.

[image] anon4126930: No need to make things complicated. [image] Whoops.

[image] sazrocks: but if a ref takes their 36" sizing tool and measures the robot, it will still seem to be more than 2" under the limit. Right, in the end, this is what is important, and all that will be used to measure expansion. Furthermore, the inspector will look at the case that multip…

I think it’s important to be precise and not misleading, especially for rules like this. As @VexTeamZ showed, some teams may misinterpret the rule to be talking about a circle, and may design their robots in CAD accordingly, restricting the design of their robots more than is necessary. It is import…

how about if I expand two claws alternately, however each claw will not exceed 36inch. [方式1] [方式2]

That would work, but the referee will be watching very closely. I’d suggest some code and limit switches to prove at inspection that they both can’t extend at the same time.

So with the manual update specifying this rule, I just wanted to make sure that I understand everything properly. (I am sorry to revive this thread but I didn’t want to create a new one for my question). So, when the manual uses the “point-to-point” wording that means that as illustrated below the …

Clarification on <SG2>

VEX V5 Robotics Competition V5 Tipping Point (21/22)

VexTeamZ June 2, 2021, 8:01pm 6

Whoops.

Any overunder robot/strategy ideas