Siemens SINUMERIK 840D sl Programming Manual page 282

Special motion commands
4.5 Polynomial interpolation (POLY, POLYPATH, PO, PL)
PL
Activate/deactivate POLY
Polynomial interpolation belongs to G0, G1, G2, G3, A spline, B spline and C spline in the
first G group. If it is active, then it is not necessary to program the polynomial syntax: Axes
that are only programmed with their name and end point are linearly traversed to their end
point. If all axes are programmed in this way, the control behaves as for G1.
Polynomial interpolation is deactivated using another command of the G group (e.g. 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.
New polynomial syntax with PO: The previous syntax still remains valid.
Subprogram call POLYPATH
The polynomial interpolation can be selectively specified for the following axis groups using
POLYPATH:
● POLYPATH("AXES")
● POLYPATH("VECT")
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All path axes and supplementary axes.
Orientation transformation (for orientation transformation).
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
values 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 located. If no PL is programmed, then
PL=1 is applied.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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