Siemens SINUMERIK 840D sl Programming Manual page 231

4.2 Spline interpolation (ASPLINE, BSPLINE, CSPLINE, BAUTO, BNAT, BTAN, EAUTO, ENAT, ETAN, PW, SD, PL)
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
EAUTO
Meaning
Spline interpolation type:
ASPLINE
BSPLINE
CSPLINE
Points along a curve and check points:
X... Y... Z...
A... B... C...
Point weight (only B spline):
PW
<n>
Spline degree (only B spline):
SD
Distance between nodes (only B spline):
PL
<value>
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
/ /
BNAT BTAN
/ /
ENAT ETAN
Command to activate A spline interpolation
Command to activate B spline interpolation
Command to activate C spline interpolation
The
ASPLINE
and belong to the group of motion commands.
Positions in Cartesian coordinates
Using the
programmed for every point along the curve.
"Point weight"
Range of values: 0 ≤ n ≤ 3
Increment:
Effect:
A third degree polygon is used as standard, However, a second
degree polygon can also be used by programming
The distances between nodes are suitably calculated internally. The
controller can also machine pre-defined node clearances that are
specified in the so-called parameter-interval-length using the
command.
Parameter interval length
Range of values: As for path dimension
, and
BSPLINE CSPLINE
command, a so-called "point weight" can be
PW
0.0001
n > 1 The checkpoint attracts the curve
more significantly.
n < 1 The checkpoint attracts the curve less
significantly.
Special motion commands
commands are modally effective
.
SD=2
PL
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