12. COMPENSATION FUNCTION
When the beam is moved, the nozzle path can be shifted by the radius of
the nozzle (Fig.12.2 (a)).
To make an offset as large as the radius of the beam, CNC first creates an
offset vector with a length equal to the radius of the nozzle (start–up). The
offset vector is perpendicular to the nozzle path. The tail of the vector is
on the workpiece side and the head positions to the center of the beam.
If a linear interpolation or circular interpolation command is specified
after start–up, the nozzle path can be shifted by the length of the offset
vector during machining.
To return the nozzle to the start position at the end of machining, cancel
the cutter compensation mode.
Fig.12.2 (a) Outline of Cutter Compensation C