Siemens SINUMERIK 808D User Manual page 315

In contour programming, the contour calculator converts the Cartesian coordinates of the preceding end point using the
definitive pole into polar coordinates. This also applies if the preceding element has been given in polar coordinates, since
this could relate to another pole if a pole has been inserted in the meantime.
Po le change example
Po le:
End point:
L1abs = 10.0
N e w pole:
Xpole1 = 5.0
N e xt point:
L1inc = -2.0
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
Xpole = 0.0,
ϕabs = 30.0°
Ypole1 = 5.0
ϕinc = 45.0°
Ypole = 0.0,
Calculated Cart. Coordinates
Xabs = 8.6603
Calculated polar coord. Predecessor
L1abs = 3.6603
Absolute polar coordinates for current element
L1abs = 1.6603
Calculate Cartesian coordinates
Xabs = 1.1740
(Pole 0)
Yabs = 5.0
(Pole 1)
ϕabs = 0.0°
ϕabs = 45.0°
Yabs = 1.1740
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