LEGO NXT Mindstorm Frustrations
Posted October 5, 2011on:
My two robotics classes have been working on an obstacle course. I made it challenging, but it seems to be too challenging – not because the kids aren’t trying but because the robots do something a little different every time. I’m confused. I called LEGO Education support and they told me the motors are accurate to one degree per rotation.
I’m seeing errors much more than ten times that number. I can’t seem to find a way to solve the problem. We are using yellow RESET block, light green MOVE blocks, and orange rotational WAIT blocks. We have a spot carefully marked on the floor for the start and way points. Starting at the same spot may have the robot as much as an inch off within about 10 rotations. The total motor error should be about 0.17 inches. I can’t determine if it’s a problem in NXT-G or the motors.
I’ve searched the NXT books, blogs, web sites, and books, and I can’t find any references to the inaccuracy issues. Has anyone else seen these problems? How do I fix this?