Special Motion Commands
5.5 Polynomial interpolation (POLY, POLYPATH)
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
5-21
The constant coefficient (a
0
) of the denominator polynomial is always assumed to be 1, the
specified end point is not dependent on G90/G91.
The result obtained from the above example is as follows:
X(p)=10(1)/(1+p2) and Y(p)=20p/(1+p2) where 0<=p<=1
As a result of the programmed start points, end points, coefficient a
2
and PL=1, the
intermediate values are as follows:
Numerator (X)=10+0*p–p2
Numerator (Y)=0+20*p+0*p2
Denominator = 1+2*p+1*p2
<

;
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.
Note
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.
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