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  • Pre-Match - Answers

    Official Answers to questions about what happens Pre-Match can be found here.

  • #2
    Originally posted by FTC10084
    Subject: Pre-Match Robot Initialization

    Assuming that we don't violate rule <G3> by delaying the start of the match, are either of the following legal?

    Question 1: Initializing the robot off, but next to, the field before placing the robot on the field.
    Question 2: Running a program on the robot off, but next to, the field prior to placing the robot on the field.

    Answer 1: To safely move the Robot from the queue to the Playing Field, the Robot main power (12VDC) must remain OFF until the Robot is placed Completely Inside the Playing Field. The Driver Station and Robot Controller Android devices should be powered on before the Robot arrives at the Playing Field.
    Answer 2: This action is allowed if the Robot main power (12VDC) remains OFF until the Robot is placed Completely Inside the Playing Field. Of course, the benefit of running a program on the Robot Controller is limited with the Robot main power (12VDC) turned OFF.

    Comment


    • #3
      Originally posted by FTC4634
      Subject: <G3> Pre-Match Robot Placement - Using the Playing Field Wall to calibrate sensors

      Question: Is it allowed to align the robot with the Playing Field Wall during Pre-Match Setup in order to calibrate sensors (such as a gyroscope)?

      Answer: Yes, provided that the Robot is completely In the Playing Field and the action doesn't unnecessarily delay the beginning of a Match.

      Comment


      • #4
        Originally posted by FTC4634
        Subject: Pre-Match Robot Setup - Robot Motion

        Question 1: Do robots need to be motionless prior to the start of the match?
        Question 2: For example, would a continuously sweeping servo while waiting for the start of the match be allowed? (Assuming that the robot stays within the size constraints, of course).

        Answer 1: Yes
        Answer 2: No

        Comment


        • #5
          Originally posted by FTC5501
          Subject: <G3> Pre-Match Robot Placement and <G5> RobotSetup/Alignment - Robot lifting itself during Pre-Match setup

          Question: During pre-match setup, are we allowed to sit our robot on the floor in our alliance's Landing Zone with the lifting device extended, initialize our program, which in turn would latch on to the lander and pull it up into the starting position? We would wait until the robot is completely in the field before turning it on and the process would not delay the start of the match. After initialization the robot would be latched and within the 18" sizing constraint. Thanks!

          Answer: Yes, provided that the Drive Team using this method:

          a) Makes an effort to be the first one on the Playing Field;
          b) Notifies field personnel and the other Drive Teams about what they are doing; and
          c) Has a Drive Team member as a safety lookout/guard as the Robot's init routine executes.

          Comment


          • #6
            Originally posted by FTC13259
            Subject: Pre-Match Robot Set-up - Contact with an opposing Alliance Robot

            Question: At the start of the match, may robots that are hanging- touch the opposing alliances robot underneath the Lander. I.e. it's quite possible that hanging robots will cross over the red blue dividing line. Assuming that there is no entanglement issues-- is this a valid starting situation.


            Answer: A Robot may not contact another Robot before the start of the Match.

            Comment


            • #7
              Originally posted by FTC12971
              Subject: Pre-Match Robot Set-up - Latched Robot "drifts down" before the start of the Match

              Question: If a robot is correctly latched to the lander - 4 or more inches off the floor, weight completely supported by bracket, no more than 18" tall at the time that the teams initialize autonomous, and then the robot drifts down during randomization and before the 3-2-1 autonomous start countdown, what is the consequence?

              Answer: If the Robot starts "drifting down" after a Referee notifies the Drive Teams that Robots are in a "hands-off" state, the Robot may play the Match, however it is not eligible to earn the Autonomous Landing Score.

              Rule <G4> is violated if the Robot is not able to remain within the 18-inch cube Robot starting volume constraint during the time before a Referee notifies the Drive Teams that Robots are in a "hands-off" state.

              Comment


              • #8
                Originally posted by FTC9819
                Subject: Robot and Drive Team starting locations

                Question 1: May Drive Teams select their robot's field starting position or is the starting location mandated by the match schedule?

                Question 2: May Drive Teams select where they stand in the Alliance Station?

                Thank you for clarifying!!!

                Answer 1: Drive Teams may select either of their Alliance specific starting locations for their Robots. Alliance Drive Teams should agree to their respective Robot starting locations before they approach the competition Playing Field to set up for a Match.

                Answer 2: No, rule <G3> states that "Drive Teams must stand Completely inside the Alliance Station at the location (Station one or Station two) specified by the Qualification Match schedule." Station one is the location closest to the audience. Drive Teams standing in the correct location help the Emcee, Game Announcer, and other field personnel perform their tasks.

                Comment


                • #9
                  Originally posted by FTC10131
                  Subject: Pre-Match Robot setup - Confirming that a Robot is legally Latched to the Lander

                  We noticed many matches this weekend where pre-match, robots were latched to the Lander and within an 18" cube for size, but because the Lander walls bent in and the robot leaned, the robot was not 4" off the ground at the start of Autonomous. In most cases, robots that Landed from this position were still given credit for the Landing achievement.

                  Question: Will refs do anything to measure the pre-match starting configuration of robots to see if Latched robots are starting 4" off the ground (like slide a 4" tall board under the robots)? How will refs ensure that the 4" rule is being met? Or will robots that are visibly at least a few inches off the ground pre-match and Land from that position be given credit for the Landing achievement?

                  Answer: Referees are expected to verify that Robots are legally setup to start a Match. This includes determining that a Robot satisfies one of the pre-match starting options described in Section 1.5.1 of the Game Manual Part 2. Robots that are less than 4-inches above the Playing Field Floor when a Match starts are not eligible to earn the Autonomous Landing Score.

                  Referees may use a custom measuring tool, tape measure, etc. to verify compliance with the 4-inch Robot elevation requirement.

                  Comment


                  • #10
                    Originally posted by FTC9849
                    Subject: Pre-Match Robot Setup - Latched Robot Encroaching Into the opposing Alliance's Landing Zone

                    Question: Our robot design has a lift mechanism and latch that places about half of our robot under the lander when we start autonomous. Part of our robot will go over the line separating the landing zones. According to Game Manual Part 2, section 1.5.1, if you start the match deployed, you must be outside of the opposing Alliance's Landing Zone. There is no similar restriction when you are latched. Would a robot design that encroaches on the opposing Alliance's Landing Zone while latched be legal and not breaking any game rules. Thanks for your help and all you do!

                    Answer: Thank you for alerting the GDC to this discrepancy. Robots that are Latched to the Lander must start Outside the opposing Alliance's Landing Zone.

                    Comment


                    • #11
                      Originally posted by FTC10131
                      Subject: Pre-Match Robot Setup - Motionless Robot with power applied to a DC Motor

                      Question 1: Are robots allowed to provide power to a DC Motor and leave the motor in an unmoving, stalled state pre-match?

                      Question 2: Some landing/latching mechanism designs may not hold their position unless some power is applied to a DC Motor. We note that LinearOpModes can power motors before a match starts, and we wonder if there are any concerns regarding battery, motor, and heat-dissipation safety/health with leaving a motor powered and unmoving for an extended period of time prior to the start of a match.

                      Answer 1: Yes, provided that the Robot is motionless and no other rules are violated.

                      Answer 2: In general, stalling a DC Motor should be avoided due to the issues raised in the question.

                      Comment


                      • #12
                        Originally posted by FTC10131
                        Subject: Drive Team Location in the Alliance Station for the Elimination Matches

                        In the Pre-Match Answers Thread, Post #8, (https://ftcforum.usfirst.org/forum/t...8286#post68286), there was the following Q and A:

                        Question 2: May Drive Teams select where they stand in the Alliance Station?

                        Answer 2: No, rule <G3> states that "Drive Teams must stand Completely inside the Alliance Station at the location (Station one or Station two) specified by the Qualification Match schedule." Station one is the location closest to the audience. Drive Teams standing in the correct location help the Emcee, Game Announcer, and other field personnel perform their tasks.

                        As noted in the answer, the Alliance Station is specified by the Qualification Match Schedule.

                        Question 1: For Elimination Round matches, may teams select their preferred Alliance Station as these are not specified by the Qualification Match schedule?

                        Question 2: If teams may stand where they wish for the elimination round matches, would you reconsider the ruling in post #8 and allow teams to also stand where they wish for qualification matches as well? We respectfully submit that it does not present an undue burden for Emcees, Game Announcers, and other field personnel to have teams select their preferred driver station locations, as Emcees, Game Announcers, and other field personnel have historically performed their duties admirably in previous FTC games regardless of the driver station locations chosen by teams. [We know, this request is a long shot, but we thought we'd try anyway. ]

                        Thank you for your consideration.


                        Answer 1: For Elimination Matches, Alliance Partner Teams may jointly decide where each Drive Team stands in their Alliance Station (Station 1 or Station 2).

                        Answer 2: No, the requirement for where a Drive Team stands in the Alliance Station for Qualification Matches has been in the Game Manual for many seasons. There are no unique conditions in Rover Ruckus that justify changing this requirement.

                        Comment

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