Got it. We will try running over the location to see if it's common to all mats and get back to you. Checking under the mat is a great idea. 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 Tue, Jan 5, 2021 at 10:59 AM Skip Morrow <[log in to unmask]> wrote: > It's the area in the "southern corridor", just west of the pullup bar. > THere's a tree printed on the mat right there. That's where our robot > shimmies to the side each time it passes over it. It feels smooth and like > the rest of the mat, but for some reason, just right there the robot can't > drive straight. I think I will try sanding the table under it. > > As for trying to fix it with programming, it isn't consistent enough to > try anything like that. > > Thanks for the ideas though! > > Coach Skip Morrow > > On Tue, Jan 5, 2021 at 10:24 AM Mark Nottingham <[log in to unmask]> > wrote: > >> 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.