Programmable Contour Accuracy (Cprecon, Cprecof) - Siemens SINUMERIK 840D sl Programming Manual

Path traversing behavior

10.5 Programmable contour accuracy (CPRECON, CPRECOF)

Example
Program code
N10 FFWON
N20 G1 X... Y... F900 SOFT
10.5 Programmable contour accuracy (CPRECON, CPRECOF)
Function
The "Programmable contour accuracy" function reduces the path error on curved contours
through automatic adaptation of the velocity.
The contour accuracy to be maintained is specified depending on the configuration of the
machine (MD20470 $MC_MC_CPREC_WITH_FFW; see machine manufacturer
specifications) either via the setting data $SC_CONTPREC or via the programmed contour
tolerance CTOL. The smaller the value and the smaller the K
the greater the path feedrate is reduced on curved contours.
The "Programmable contour accuracy" function is activated or deactivated via the operations
CPRECON
Syntax
CPRECON
...
CPRECOF
Meaning
CPRECON
CPRECOF
464
and in the NC program.
CPRECOF
: G function call: Switch "Programmable contour accuracy" on
Effective:
: G function call: Switch "Programmable contour accuracy" off
Effective:
Modal
Modal
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
factor of the geometry axes,
V
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