Path Action
5.7 Contour accuracy, CPRECON, CPRECOF
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
5-23
Note: A minimum speed can be defined via the setting datum $SC_MINFEED which is not
fallen short of and the same value can also be written directly out from the part program via
the system variable $SC_CONTPREC.
On the basis of the value of the contour error $SC_CONTPREC and the servo gain factor
(speed / following error ratio) of the path axes concerned, the control calculates the
maximum path speed at which the contour error produced by the overtravel does not exceed
the minimum value stored in the setting data.
Example
N10 X0 Y0 G0
N20 CPRECON ;Activate contour accuracy
N30 F10000 G1 G64 X100 ;Machine contour at 10 m/min in continuous-path
mode
N40 G3 Y20 J10 ;Automatic feed limitation in circle block
N50 X0 ;Feed without limitation to 10 m/min
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