G41/G42Instruction And I, J, K Designation - Adtech ADTECH9 Series Programming Manual

Corner motion
When the connection between motion instruction segments has several compensation vectors, the tool will
move on the linear direction of the vectors, and this motion is called as corner rotation.
If these vectors are inconsistent, to move the corner, the motion action is executed in subsegment; therefore, in
single segment mode, it will execute previous segment + corner motion of previous segment and keep
connection motion + the secondary segment executes the corner motion of the other half in following
operation.

2.3.3. G41/G42instruction and I, J, K designation

Function and purpose
If G41/G42 and I, J, K are specified in same segment, the compensation direction can be changed.
Format
G17 (XY plane)G41/G42 X_Y_I_J_;
G18 (ZX plane)G41/G42 X_Z_I_K_;
ADTECH9 Series CNC Programming Manual