Siemens SINUMERIK 840D sl Programming Manual page 249

X(p) and Y(p) are calculated as follows from the programmed values:
As a result of the programmed start points, end points, coefficient a
intermediate results are as follows:
If polynomial interpolation is active and a denominator polynomial is programmed with zeros
within the interval
have no effect on the motion of special axes.
Note
Tool radius compensation can be activated with
interpolation and can be applied in the same way as in linear or circular interpolation modes.
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
X(p) = (10 - 10 * p ) / (1 + p
2
Y(p) = 20 * p / (1 + p )
2
with 0 ≤ p ≤ 1
Numerator (X) = 10 + 0 * p - 10 * p
Numerator 0 + 20 * p + 0 * p
(Y) =
Denominator = 1 + p
2
, this is rejected and an alarm is output. Denominator polynomials
[0,PL]
4.5 Polynomial interpolation (POLY, POLYPATH, PO, PL)
)
2
2
2
,
G41 G42
Special motion commands
and PL=1, the
2
in conjunction with polynomial
249