Creating Contour Elements - Siemens SINUMERIK 840D sl Operating Manual

Programming technology functions
9.1 Programming contours
Polar starting point
Parameter Description
PL Machining plane
Cartesian:
X Starting point X (abs)
Y Starting point Y (abs)
Polar:
X Position pole (abs)
Y Position pole (abs)
Starting point
L1 Distance to pole, end point (abs)
ϕ1 Polar angle to the pole, end point (abs)
Additional com‐ The contour is finished in continuous-path mode (G64). As a result, contour transitions
mands such as corners, chamfers or radii may not be machined precisely.
If you wish to avoid this, then it is possible to use additional commands when program‐
ming.
Example:
For a contour, first program the X parallel straight line and then enter "G9" (non-modal
exact stop) for the additional command parameter. Then program the Y-parallel straight
line. The corner will be machined exactly, as the feedrate at the end of the X-parallel
straight line is briefly zero.
9.1.3

Creating contour elements

After you have created a new contour and specified the starting point, you can define the
individual elements that make up the contour.
The following contour elements are available for the definition of a contour:
● Straight vertical line
● Straight horizontal line
● Diagonal line
● Circle/arc
● Pole
202
1. Select the machining plane and press the "Pole" softkey.
2. Enter the pole position in Cartesian coordinates.
3. Enter the starting point for the contour in Polar coordinates.
4. Enter any additional commands in G-code format, as required.
5. Press the "Accept" softkey.
6. Enter the individual contour elements.
Unit
mm
mm
mm
Degrees
mm
Degrees
Operating Manual, 05/2017, A5E40869190
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