Mitsubishi Electric MELDAS C6 Programming Manual page 136

12. Tool Offset Functions
Precautions
(1) Issue the I, J type vector in a linear mode (G0, G1). If it is issued in an arc mode at the start of
compensation, program error (P151) will result.
An IJ designation in an arc mode functions as an arc center designation in the offset mode.
(2) When the I, J type vector has been designated, it is not deleted (avoidance of interference)
even if there is interference.
Consequently, overcutting may arise in such a case.
Y
N2
(3) The vectors differ for the G38 I _J_ (K_) command and the G41/G42 I_J_(K_) command.
Vector in IJ direction having an offset
amount size
Cut section
X
N4
N3
G38
(G41)
G38 G91 X100. I50. J50. ;
(Offset amount)
128
12.3 Tool radius compensation
N1 G28 X0Y0 ;
N2 G42 D1 F1000 ;
(I,J)
N3 G91 X100. ;
N4 G42 X100. Y100. I10. ;
N5 X100. Y-100. ;
N6 G40 ;
N7 M02 ;
N6
N5
G41 G91 X100. I50. J50. ;
(I J)
(Offset amount)
Vector perpendicular in IJ direction and
having an offset amount size
G41/G42
(G41)
(I J)