Does anyone know a way to control the direction of the finish pass

I am doing a 4 axis cut and it keeps starting the pass on the X - side as it moves back and forth in Y towards X+ thus it is vibrating like a diving board as it gets way out from the vice which is in X -

What would be best it is remove the last of the support material as the cutter moves towards to vice

I also have this problem when doing a a tilt cut in gem stone with diamond cutters it will randomly choose either to start Y+ and move towards Y- or Y-towardsY+ which is the way I need it .

I find it hard to imagine no one has had this issue with 5 axis cutting as everything is hanging way out all the time ,so I must be overlooking a way to do it .

Thanks