
PROGRAMMING
B–63504EN/01
14. COMPENSATION FUNCTION
231
Tool nose radius compensation is not performed for commands input
from the MDI.
However, when automatic operation using absolute commands is
temporarily stopped by the single block function, MDI operation is
performed, then automatic operation starts again, the tool path is as
follows :
In this case, the vectors at the start position of the next block are translated
and the other vectors are produced by the next two blocks. Therefore,
from next block but one, tool nose radius compensation is accurately
performed.
V
B2
V
B1
V
C1
’
V
C1
V
C2
V
B1
’
V
B2
’
P
B
P
A
P
B
’
P
C
P
D
Command
for MDI
When position P
A
, P
B
, and P
C
are programmed in an absolute command,
tool is stopped by the single block function after executing the block from
P
A
to P
B
and the tool is moved by MDI operation. Vectors V
B1
and V
B2
are translated to V
B1
’ and V
B2
’ and offset vectors are recalculated for the
vectors V
C1
and V
C2
between block P
B
–P
C
and P
C
–P
D
.
However, since vector V
B2
is not calculated again, compensation is
accurately performed from position P
C
.
14.3.7
Input Command from
MDI