I wonder if this spot is consistent on all mats. Sounds like a pothole. Could the color in that location be causing it? We have 3 teams at my school, 3 mats. We could try running over the same area to see. On the plus side, programming to adjust to this spot would work and since your competition rounds are done on your home mat, well you have home field advantage. Does your team feel comfortable sharing an image of the spot in question? Mark Nottingham 6th Grade Science Teacher First Lego League Robotics Coach- CCMS Team 31516 Carroll County Middle School Carroll County Public Schools (276)728-2382 [log in to unmask] On Mon, Jan 4, 2021 at 8:44 PM Skip Morrow <[log in to unmask]> wrote: > *CAUTION: *This email originated from outside of JMU. Do not click links > or open attachments unless you recognize the sender and know the content is > safe. > ------------------------------ > VA-DC Coaches. Hoping someone can help us. > > Our robot normally runs very straight. But lately we have been noticing a > couple of spots on the mat where our robot will almost always do a short > jog to the left of about one cm. The spots are very specific and the > sidestep happens with near 100% regularity. Everywhere else on the mat, the > robot drives perfectly. We have tried cleaning the wheels many times. The > mat seems clean, but there are some wear marks in the problem areas. It > sure doesn't feel greasy or slippery or tacky in those specific areas. I am > at a loss. I am hesitant to try cleaning the mat with anything, but I'd > like to hear if any of you guys have any ideas. > > To be clear, it is a very specific spot. We can program in a move tank > block, 10 revolutions, and aim the robot to pass over the spot. No matter > how far away we are at the start, it will shift at that same spot. > > Coach Skip Morrow > ------------------------------ > To UNSUBSCRIBE or CHANGE your settings, please visit > https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or > leave the list". > VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. > Visit https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to > subscribe. > -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.