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Siemens SINUMERIK 840D Operator's Manual Page 216

Computerized numerical control system for machine tools.
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6
Program Operating Area
6.5 Free contour programming
Selecting a contour
element
Displaying additional
parameters
All
parameters
Alter-
native
Define pole
Continue
Accept
element
Tangent to preceding
element
Tangent to
prec. elem.
Make a dialog selection
Select
dialog
Select
Accept
dialog
dialog
6-216
Position the cursor on the desired contour element in the contour
chain, and select it with the "Input" key.
The parameters for the selected element will then be displayed.
The name of the element appears at the top of the parameterization
window.
Once the contour element can be displayed geometrically, it is
highlighted accordingly in the graphic display area, i.e. its color
changes from black to orange.
If your drawing contains further data (dimensions) for a contour
element, select softkey "All parameters" to extend the range of input
options for the element.
The softkey "Alternative" is displayed only in cases where the cursor
is positioned on an input field with several selectable settings.
If you wish to enter the contour elements Diagonal line and Circle/arc
in polar coordinates, you must first define a pole.
Press the "Continue" and "Pole" softkeys.
Pole
Enter the coordinates of the pole.
Press the "Accept element" softkey.
The pole is defined. You can now choose between "Cartesian" and
"Polar" in the input screen form for the Diagonal line and Circle/Arc
contour elements.
When entering data for a contour element you can program the
transition to the preceding element as a tangent.
Press the "Tangent to prec. elem." softkey.
The angle to the preceding element α2 is set to 0°. The "tangential"
selection appears in the parameter input field.
Some constellations of parameters can produce several different
contour characteristics. In such cases, you will be asked to select a
dialog. When you select the "Select dialog" softkey, the existing
selection options are listed in the graphic display area.
Select the appropriate dialog (black continuous line) with "Select
dialog" softkey and confirm by selecting "Accept dialog" softkey.
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
6
03.04
 Siemens AG, 2004. All rights reserved

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