Angle change clearance

It's the distance (A) which allows to anticipate the rotation of the tool. Rotation is so more progressive.

In the following samples,

The blue arrow defines the machining direction

The green arrows define the angle

The magenta arrows define the angle inside the clearance distance (A)

Sample 1 : Angle change clearance (A) =  0

Sample 2 : Angle change clearance (A) >  0

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