Siemens SINUMERIK 840D Operator's Manual page 287

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03.04
Ó Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
6.5 Free contour programming
Incremental polar coordinates relate to both the definitive pole and the
end point of the preceding element.
For an incremental input, the absolute distance to the pole is
calculated using the absolute distance of the end point for the
preceding element to the pole plus the length increment that was
entered.
The increment can be positive or negative.
The absolute angle is calculated accordingly using the absolute polar
angle of the preceding element plus the angular increment. Here it is
not necessary for the preceding element to have been entered as
polar.
The geometry processor of the contour programming always converts
the Cartesian coordinates of the previous end point into polar
coordinates using the definitive pole. This also applies if the preceding
element was entered as polar, and could relate to a different pole, if a
pole was set in the meantime.
"Program" Operating Area
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