The main changes are that a robot must be FULLY supported by a bridge to receieve the bonus points, and that robots cannot push/react against the top of the fender. It also defined the term ‘frame perimeter.’
The Robot must have a Frame Perimeter that is comprised of fixed, non-articulated structural elements of the Robot. The Frame Perimeter of a Robot is defined by the outer-most set of exterior vertices on the Robot that are within the Bumper Zone, which is between 2 and 10 in. from the floor. Minor protrusions no greater than ¼ in. such as bolt heads, fastener ends, and rivets are not considered part of the Frame Perimeter.
To determine the Frame Perimeter, wrap a piece of string around the Robot at the level described in [R02]. The string describes this polygon.
Note: to permit a simplified definition of the Frame Perimeter and encourage a tight, robust connection between the Bumpers and the Frame Perimeter, minor protrusions such as bolt heads, fastener ends, rivets, etc are excluded from the determination of the Frame Perimeter.
Honestly disappointed that the “G28, G44 and G45” interaction hasn’t been clarified yet, which tells me either that the interaction is intended (which I highly disagree with) or the GDC hasn’t noticed that the way the three rules interact is ambiguous. Hopefully when Q&A opens there will be a flood of questions about this.
When they say fully supported, does that mean the robot can only be in contact with the bridge, or are they saying that the robot can’t be hanging off the bridge (regardless of whether or not it’s only touching the bridge)?
In other words, am I still balanced if a bit of my robot is hanging off the bridge but still not touching anything else?
Hmm, I thought this clarification was to avoid robots from dropping down a support beam to the ground at one end of the bridge. I don’t think it would eliminate robot-on-robot designs, since the bridge is still supporting the weight of both robots.
Does the fixed frame perimeter eliminate the possibility of an Archimedes Screw type of ball collection where the ball would enter the system by driving over it? I cannot really decide, but a fixed frame perimeter with ground clearance of 2-10 inches seems to make that impossible now.