The most reliable way for the robot to perform tasks on the mat is to use sensor feedback, using color, light, touch and gyro sensors. It’s more complicated but a good combination of mechanical and programming solutions will give the most reliable solutions Sent from my iPhone > On Nov 10, 2019, at 10:03 AM, Skip Morrow <[log in to unmask]> wrote: > > > The most reliable and repeatable way to move from point to point is to use mechanics wherever you can. Wall following is a great example. This year wall following is difficult, but it is possible. > > Also, try looking for things on the mission model itself that lends itself to helping the robot. We like to make funnels for our attachments to help align the robot to a mission model. See the high-resolution photograph I have a attached :) > > Remember, the most reliable solution will almost always be a mechanical solution. Look for the very best possible mechanical solution and then start programming. > >> On Sat, Nov 9, 2019 at 10:13 PM Leyla Nazhand-Ali <[log in to unmask]> wrote: >> Good evening, >> >> As a rookie coach, I have a general question for the community: what is the most reliable and repeatable way to go from point A to point B using Ev3 (FLL robot)? >> >> I know there is a method to use actual motor rotation counts. I also know we can use a gyro sensor. Any advantages or disadvantages for each of these methods? >> >> We have two related problems: 1) our navigation program doesn’t behave similarly a few days later or on a different table. 2) a backup robot we built doesn’t run the same programs in a similar way to our original robot even on the same table and almost the same time. In other words, our solutions are not robust. >> >> I know this is a very broad question that probably touches upon various topics. However, I appreciate if the other coaches point me to good resources or share their wisdom with me. >> >> Thanks, >> Leyla >> >> -- >> Sent from my iPhone >> 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. > <RobotFunnel.png> -- 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.