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14 The Tool Compensation
86
Fig. 14.5-3
An auxiliary data is to be introduced
before embarking on the discussion of the
details of the compensation computation.
It is """, the angle at the corner of two
consecutive blocks viewing from the
workpiece side. The direction of "
depends on whether the tool goes around
the corner from the left or right side.
The control will select the strategy of
going around in the intersection points as
the function of angle ". If ">180°, i.e.,
the tool is working inside, the control will
compute a point of intersection between
the two interpolations. If "<180°, i.e., the tool is moving around the outside, it may add further
straight sections.