System Variables - Siemens SINUMERIK 828D Function Manual

W1: Tool offset
18.5 Tool radius compensation 2D (TRC)
Figure 18-20 Velocities in the SAR subblocks on retraction
18.5.4.4

System variables

Points P and P can be read in the WCS as system variables during approach.
3 4
$P_APR: Read P (start point) in WCS
3
$P_AEP: Read P (contour start point) in WCS
4
$P_APDV =1
=0
Changing the WCS between the SAR block and the read operation has no effect on the position values.
1474
If the content of $P_APR and $P_AEP is valid, i.e., if these contain the
position values belonging to the last SAR approach block programmed.
The positions of an older SAR approach block are read.
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions