Siemens SINUMERIK 840D sl Programming Manual page 490

Path traversing behavior
10.11 Programmable contour/orientation tolerance (CTOL, OTOL, ATOL)
Example
Program code
COMPCAD G645 G1 F10000
X... Y... Z...
X... Y... Z...
X... Y... Z...
CTOL=0.02
X... Y... Z...
X... Y... Z...
X... Y... Z...
ASCALE X0.25 Y0.25 Z0.25
X... Y... Z...
X... Y... Z...
X... Y... Z...
CTOL=–1
X... Y... Z...
X... Y... Z...
X... Y... Z...
Further information
Read tolerance values
For more advanced applications or for diagnostics, the currently valid tolerances for the
compressor functions (COMPON, COMPCURV, COMPCAD), the smoothing types G642,
G643, G645, OST, and the orientation smoothing ORISON can be read via system variables
irrespective of how they might have come about.
● In synchronized actions or with preprocessing stop in the part program via system
490
variables:
$AC_CTOL
$AC_OTOL
Comment
; Activate COMPCAD compressor function.
; The machine and setting data is applied here.
; A contour tolerance of 0.02 mm is applied
starting from here.
; A contour tolerance of 0.005 mm is applied
starting from here.
; The machine and setting data is applied again
starting from here.
Contour tolerance effective when the current main run
record was preprocessed.
If no contour tolerance is effective,
the root from the sum of the squares of the tolerances
of the geometry axes.
Orientation tolerance effective when the current main
run record was preprocessed.
If no orientation tolerance is effective,
return the root from the sum of the squares of the
tolerances of the orientation axes during active
orientation transformation. Otherwise, it will return the
value "-1".
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
will return
$AC_CTOL
will
$AC_OTOL
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