Siemens SINUMERIK 840D sl Programming Manual page 606

Work preparation
3.7 Special motion commands
X, Y, Z:
xe, ye, ze :
a2, a3, a4, a5 :
PL :
Activating/deactivating polynomial interpolation
The polynomial interpolation is activated in the part program using the POLX G command.
The POLY G command together with G0, G1, G2, G3, ASPLINE, BSPLINE and CSPLINE
belong to the 1st group.
Axes, which are only programmed with name and end point (e.g. X10), are linearly moved. If all
axes of an NC block are programmed in this way, the control behaves the same as for G1.
The polynomial interpolation is implicitly deactivated again by programming another command
of the 1st G group G0, G1).
Polynomial coefficient
The PO value (PO[]=) or ...=PO(...) specifies all polynomial coefficients for an axis.
Several values are specified, separated by commas corresponding the degree of the
polynomial. Different degrees of polynomials are possible for various axes within one block.
POLYPATH subprogram
Using POLYPATH(...), the polynomial interpolation can be selectively released for certain axis
groups:
The axes that are not released are linearly moved.
Polynomial interpolation is enabled as standard for both axis groups.
Polynomial interpolation is deactivated for all axes by programming without the POLYPATH( )
parameter.
606
Only path axes and supplementary axes:
Only orientation axes:
(when moving with orientation transformation)
Axis identifier
Specification of end position for the particular axis;
value range as for path dimension
The coefficients a , a , a , and a
2 3 4
their value; value range as for path dimension. The
last coefficient in each case can be omitted if it
equals zero.
Length of the parameter interval where polynomials
are defined (definition range of the function f(p)).
The interval always starts at 0, p can assume val‐
ues from 0 to PL.
Theoretical value range for PL:
0.0001 ... 99 999.9999
Note:
The PL value applies to the block in which it is lo‐
cated. If no PL is programmed, then PL=1 is ap‐
plied.
POLYPATH("AXES")
POLYPATH("VECT")
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
are written with
5
NC programming