Manufacturing And Production Technology
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in clockwise direction and absolute dimension
Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension

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Manufacturing And Production Technology
The lip angle is the angle

Between the face of the tool and a line tangent to the machined surface at the cutting point
None of the listed here
Between the tool face and the ground end surface of flank
Made by the face of the tool and the plane parallel to the base of the cutting tool

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