Mitsubishi Electric MELDAS C6 Programming Manual page 131

12. Tool Offset Functions
If the compensation vector obtained with point of intersection calculation is extremely large, a
perpendicular vector will be created in the block before G40.
(2) If the arc is 360° or more due to the details of I, J and K at G40 after the arc command, an
uncut section will occur.
Program path
Tool center path
Corner movement
When a multiple number of offset vectors are created at the joints between movement command
blocks, the tool will move in a straight line between those vectors.
This action is called corner movement.
When the vectors do not coincide, the tool moves in order to machine the corner although this
movement is part and parcel of the joint block. Consequently, operation in the single block mode
will execute the previous block + corner movement as a single block and the remaining joining
movement + following block will be executed as a single block in the following operation.
This movement and feedrate
fall under block N2.
(a,b)
G40
Tool center path
G41
Program path
(i,j)
(i,j)
r
N1
r
G42
G40
N2
Tool center path
123
12.3 Tool radius compensation
A
r
r
Hypothetical tool center path
r
Uncut section
N2
N1 (G42,G91) G01X200. ;
N2 G02 J150. ;
N3 G40 G1X150. Y-150. I-100. J100. ;
N3
N1
Program path
θ
r
r
Stop point with single block
Center of circular