Nc Block Compression (Compon, Compcurv, Compcad, Compof) - Siemens SINUMERIK 840D sl Programming Manual

Example: Spline group with three path axes
Program code
N10 G1 X10 Y20 Z30 A40 B50 F350
N11 SPLINEPATH(1,X,Y,Z)
N13 CSPLINE BAUTO EAUTO X20 Y30 Z40 A50 B60
N14 X30 Y40 Z50 A60 B70
...
N100 G1 X... Y...
4.4 NC block compression (COMPON, COMPCURV, COMPCAD,
COMPOF)
Function
CAD/CAM systems normally produce linear blocks, which meet the configured accuracy
specifications. In the case of complex contours, a large volume of data and short path
sections can result. The short path sections restrict the processing rate.
By using a compressor function, the contour, specified by using linear blocks, is approached
using polynomial blocks. This has the following advantages:
● Reduction of the number of required part program blocks for describing the workpiece
● Continuous block transitions
● Higher maximum path velocities
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1

4.4 NC block compression (COMPON, COMPCURV, COMPCAD, COMPOF)

contour
Special motion commands
Comment
; Spline group
; C spline
; Intermediate points
; Deselect spline
interpolation
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