Spline Group (Splinepath) - Siemens SINUMERIK 840D sl Programming Manual

Nc programming

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The function is activated via the channel-specific machine data:

MD20488 $MC_SPLINE_MODE (setting for spline interpolation).

Further information: Function Manual Basic Functions

Spline group (SPLINEPATH)

The axes to be interpolated in the spline group are selected using the SPLINEPATH command.

Up to eight path axes can be involved in a spline interpolation grouping.

If SPLINEPATH is not explicitly programmed, then the first three axes of the channel are

traversed as spline group.

The spline group is defined in a separate block:

SPLINEPATH(n,X,Y,Z,...)

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...

NC programming

Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

Command to define a spline group

=1 (fixed value)

Identifier of the path axes to be interpolated in the spline group

Work preparation

3.7 Special motion commands

; Spline group

; Intermediate points

; Deselect spline interpola-

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Sinumerik 840de sl