Siemens SINUMERIK 840D sl Programming Manual

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

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based