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1

A 360 degree turn takes: (width of robot/circumference of wheel) turns, neglecting track thickness, assuming the tracks are at sides if the robot. The length of track doesn't matter. Your robots non-slipping part of the track is traversing a circle of diameter=width of robot. The other parts of the track are sliding across the surface. A longer robot / ...


3

The math you're suggesting may work for going straight forward or backward where slipping is limited. For a turn, it will not come close. Even getting the center of rotation of the turning robot will be difficult. The tracks will have to slip. A tracked robot can not turn without those tracks slipping. Differences in friction will alter the turn. More ...


2

I think that it mean that the virtual machine running on the EV3 brick has encountered an unknown instruction. Perhaps your program has become corrupted or there is an block that is not configured correctly. I would copy and paste your blocks into a new program and see if it works. If it does not, start a new program from scratch or just copy a little bit ...



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