the poles holding the cylinder,

should have a protruding/retracting mechanism,

instead the wheels pushing it back and forth

as it cuts the tree.

 

why. the wheels should be directed so

it can easily maneuver itself away from the falling tree.

so positioned in an angle, *at the end stages of the cut.

 

laser sensors will easily detect the diameter of the tree

and software should be able to predict its fall...