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Thread: Trackball Crossing the Line

  1. #1
    FRC1700 Guest

    Default Trackball Crossing the Line

    In rule <G10>, the manual states: Each TRACKBALL that has CROSSED its own FINISH LINE while not in contact with a ROBOT of the same ALLIANCE will earn 2 points. A TRACKBALL that has CROSSED its own FINISH LINE which contacts ROBOTS of both ALLIANCES while CROSSING will earn 2 points.
    Our team is confused as to whether or not this means our robot cannot be in contact with the trackball while it is crossing the finish line or if this means only one robot from an alliance may be touching the trackball as it crosses the finish line.

  2. #2
    FRC663 Guest

    Smile Trackball Crossing the Line

    Can you provide a clarification of rule G10, trackball crossing the finish line while not in contact with an alliance robot? Does this mean we must release the trackball before it breaks the plane of the finish line, and an alliance robot cannot touch it again until the trackball travels completely through the plane of the finish line? Or does the point at which the trackball touches the floor just need to be across the plane of the finish line?

    I would like clarification on what is the criteria of separation from the trackball and alliance robots in order to get credit for the 2 point trackball score?

  3. #3
    FRC753 Guest

    Smile Trackball Crossing the Line

    With regard to rule <G10>, does any contact between an alliance's ball and one of its robots while the ball has broken the plane of the finish line (i.e., within one diameter of the finish line) prevent the scoring of that trackball?

    Would the score count if the ball contacts (bounces, rolls off, brushes) a robot of the opposing alliance at anytime while it has broken the plane of the finish line?

  4. #4
    Join Date
    Jan 2006
    Posts
    2,777

    Default Re: Trackball Crossing the Line

    The intent of Rule <G10> is that no Robot (preferably from either Alliance) should be in contact with the Trackball while it crosses the Finish Line. If your Trackball contacts you, or one of your Alliance Partners, while crossing your Finish Line, the Trackball will not be awarded points. If your Trackball contacts an Opposing Robot, the Trackball will be awarded points.

    To be awarded points for having a Trackball cross the Finish Line, the Trackball must be completely free of contact by the Alliance Robot during the entire process of passing through the vertically projected plane of the Finish Line. In other words, from the point where the Trackball is just about to begin crossing the Finish Line, until it is completely past the Finish Line, the Robot must not touch the Trackball.

    There are no specific requirements for the separation between the Trackball and the Robot. However, to be counted, the separation must be clearly visible to the Referees that will be making the determination of contact/no-contact. Therefore, you will want to avoid any designs which partially or completely surround the Trackball during the process of crossing the Finish Line and may obscure the ability to view the Trackball.

    The provision of the second sentence in Rule <G10> is so that Robots from opposing Alliances do not get into pushing matches with Trackballs that are crossing the Finish Line (e.g. there is no advantage for an opponent to block a Trackball that is being pushed across the Finish Line).

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