Siemens SINUMERIK 828D Programming Manual page 495

System variables
The G0 tolerance factor, effective in the part program or in the actual IPO block, can be read
using system variables.
● In synchronized actions or with preprocessing stop in the part program via system
● Without preprocessing stop in the part program via system variable:
If no value with
variables supply the value set using MD20560 $MC_G0_TOLERANCE_FACTOR.
If no rapid traverse (G0) is active in a block, then these system variables always supply a
value of 1.
Example
Program code
COMPCAD G645 G1 F10000
X... Y... Z...
X... Y... Z...
X... Y... Z...
G0 X... Y... Z...
G0 X... Y... Z...
CTOL=0.02
STOLF=4
G1 X... Y... Z...
X... Y... Z...
X... Y... Z...
G0 X... Y... Z...
X... Y... Z...
Job planning
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
variable:
$AC_STOLF
$P_STOLF
is programmed in the active part program, then these two system
STOLF
Active G0 tolerance factor
G0 tolerance factor, which was effective when processing the
actual main run block.
Programmed G0 tolerance factor
Comment
; Compressor function COMPCAD
; The machine and setting data apply here.
; Machine data $MC_G0_TOLERANCE_FACTOR (e.g. =3), is
effective here, i.e. a smoothing tolerance of
$MC_G0_TOLERANCE_FACTOR*$MA_COMPRESS_POS_TOL.
; A contour tolerance of 0.02mm is applied starting
from here.
; From here, a G0 tolerance factor of 4 applies, i.e. a
contour tolerance of 0.08mm.
Path traversing behavior
8.9 Tolerance for G0 motion (STOLF)
495