Siemens sinumerik 840d Programming Manual page 168

Special Motion Commands
5
5.4 Polynomial interpolation, POLY
840D 840D
NCU 571 NCU 572
NCU 573
An alarm is output if a denominator polynomial with
zeros is programmed within the interval [0,PL] when
polynomial interpolation is active. Denominator
polynomials have no effect on the motion of special
axes.
Additional notes
Tool radius compensation can be activated with
G41, G42 in conjunction with polynomial
interpolation and can be applied in the same way as
in linear or circular interpolation modes.
5-168
810D 840Di
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
04.00
5
 Siemens AG 2000. All rights reserved