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Special Motion Commands

4.2 Spline interpolation (ASPLINE, BSPLINE, CSPLINE, BAUTO, BNAT, BTAN, EAUTO, ENAT, ETAN, PW,

SD, PL)

Job planning

240 Programming Manual, 07/2010, 6FC5398-2BP40-0BA0

In addition to the spline curve, resulting from the example program (ASPLINE), the following

diagram also contains the spline curves that would have been obtained when activating

either B or C spline interpolation (BSPLINE, CSPLINE):



 









$63/,1(

%63/,1(

&63/,1(

1

;

1)LUVWVXESURJUDPFDOO

6HFRQGVXE

SURJUDPFDOO

Further Information

Advantages of spline interpolation

By using spline interpolation, the following advantages can be obtained contrary to using

straight line blocks

G01:

● The number of part program blocks required to describe the contour are reduced

● Soft, curve characteristics that reduce the stress on the mechanical system at transitions

between part program blocks.

Siemens SINUMERIK 828D Programming Manual

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