Polynomial Interpolation (Poly, Polypath, Po, Pl) - Siemens SINUMERIK 840D sl Programming Manual

Special motion commands

4.5 Polynomial interpolation (POLY, POLYPATH, PO, PL)

Program code
N24053 X43.365 Z32.477
N24054 X43.556 Z32.449
N24055 X43.818 Z32.387
N24056 X44.076 Z32.300
...
COMPOF
G00 Z50
M30
References
Function Manual, Basic Functions; Continuous-Path Mode, Exact Stop, Look Ahead (B1),
Section: "NC block compression"
4.5 Polynomial interpolation (POLY, POLYPATH, PO, PL)
Function
It actually involves a polynomial interpolation (
main purpose is to act as an interface for programming externally generated spline curves
where the spline sections can be programmed directly.
This mode of interpolation relieves the NC of the task of calculating polynomial coefficients. It
can be optimally applied in cases where the coefficients are supplied directly by a CAD
system or post processor.
Syntax
3rd degree polynomial:
POLY PO[X]=(xe,a2,a3) PO[Y]=(ye,b2,b3) PO[Z]=(ze,c2,c3) PL=n
5th degree polynomial and new polynomial syntax:
POLY X=PO(xe,a2,a3,a4,a5) Y=PO(ye,b2,b3,b4,b5) Z=PO(ze,c2,c3,c4,c5)
PL=n
POLYPATH("AXES","VECT")
Note
The sum of the polynomial coefficients and axes programmed in an NC block must not
exceed the maximum permitted number of axes per block.
244
Comment
; Compressor function off.
) and not a spline interpolation type. Its
POLY
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
Job Planning