Siemens sinumerik 840d Programming Manual page 156

Special Motion Commands
5
5.2 Spline interpolation
840D 840D
NCU 571 NCU 572
NCU 573
Example
C spline, zero curvature at start and end
N10 G1 X0 Y0 F300
N15 X10
N20 BNAT ENAT
N30 CSPLINE X20 Y10
N40 X30
N50 X40 Y5
N60 X50 Y15
N70 X55 Y7
N80 X60 Y20
N90 X65 Y20
N100 X70 Y0
N110 X80 Y10
N120 X90 Y0
N130 M30
5-156
FM-NC 810D 840Di
Y
50
40
30
20
10
10 20
C spline, at start and end
Zero curvature
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
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