Adtech ADTECH9 Series Programming Manual page 59

Compensation value of compensation vector
The compensation value is determined by I, J specified segment compensation No. (or mode).
The compensation value of vector O equals to the value recorded on compensation No. mode D1 of N100
segment.
The compensation value of vector P equals to the value recorded on compensation No. mode D2 of N200
segment.
Other precautions
(1) If I, J vector is used, the compensation starts in linear mode (G00, G01). In arc mode, the program will
alarm. In compensation mode, the IJ instruction in arc mode is the arc center.
(2) After I, J vector is made, the vector won't disappear even there is interference (no interference avoidance).
Therefore, over cutting may occur sometimes.
ADTECH9 Series CNC Programming Manual