A spline defines a curve which is formed from polynomials of 2nd or 3rd degree. The
characteristics of the points along the curve of a spline can be defined depending on the spline
type being used.
P6
P5
P4
P3
P2
P1
P1 to P6: specified coordinates
For SINUMERIK solution line, the following spline types are available:
● A spline
● B spline
● C spline
Syntax
General:
ASPLINE X... Y... Z... A... B... C...
BSPLINE X... Y... Z... A... B... C...
CSPLINE X... Y... Z... A... B... C...
For a B spline, the following can be additionally programmed:
PW=<n>
SD=2
PL=<value>
For A and C splines, the following can be additionally programmed:
BAUTO / BNAT / BTAN
EAUTO / ENAT / ETAN
Meaning
Spline interpolation type:
ASPLINE: Command to activate A spline interpolation
Work preparation
3.7 Special motion commands
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0 593
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