Siemens SINUMERIK 840D sl Programming Manual page 251

Examples
Example 1:
The following example shows a square with 20 mm side lengths and corners rounded-off
with G643. The maximum deviations from the precise contour are defined for each axis
using the axis-specific machine data MD33100 $MA_COMPRESS_POS_TOL[<n>].
Program code
N10 G1 X... Y... Z... F500
N20 G643
N30 XO Y0
N40 X20 Y0
N50 X20 Y20
N60 X0 Y20
N70 X0 Y0
N100 M30
Example 2:
The following example shows the difference between both types of motion control. Both
times the default setting FGROUP(X,Y,Z) is active.
Program code
N10 G1 X0 A0 F1000 SPATH
N20 POLY PO[X]=(10,10) A10
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
4.6 Settable path reference (SPATH, UPATH)
Comment
; Block-internal corner rounding with G643
; Edge length (mm) for the axes
Special motion commands
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