Specifying Contour Elements In Polar Coordinates, Closing The Contour - Siemens SINUMERIK 840D Operator's Manual

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03.04

6.5.6 Specifying contour elements in polar coordinates, closing the contour

Pole
Entering
polar coordinates
More
Pole
Close
contour
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
Function
When defining the coordinates of contour elements in previous
sections, positions were entered using the Cartesian coordinate
system. In HMI Advanced SW 6.2 or later, positions can be defined
using polar coordinates as an alternative.
When programming contour definitions, a pole can be defined at any
time before the polar coordinates are used. Programmed polar
coordinates later relate to this pole. The pole is modal and can be re-
specified at any time. It is always entered in absolute Cartesian
coordinates. The geometry processor converts values entered as
polar coordinates into Cartesian coordinates. Programming in polar
coordinates is only possible after a pole has been entered. The pole
input does not generate a code for the NC program.
The polar coordinates are valid in the level selected with G17 to G19.
The pole
is a contour element that can be edited, which itself does not
contribute to the contour. It can be entered when the starting point of
the contour is defined or anywhere within the contour. The pole
cannot be created before the starting point of the contour.
Polar coordinates
The softkey "More" in the basic plane of the contour programming
accesses the "Pole" screen form and the softkey "Close contour".
The pole can only be entered in absolute Cartesian coordinates. The
softkey "Pole" is also present in the starting point screen form. This
enables the pole to be entered at the start of a contour, so that the
first contour element can be entered in polar coordinates.
The contour is closed by a straight line between the last entered
contour point and the starting point.
Other information
If the straight line that was generated with close contour is linked to
the start element of the contour with a radius or chamfer, the radius or
chamfer must be specified explicitly as follows:
"Program" Operating Area
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