The control uses these functions to approach a contour on a straight line perpendicular to the first contour point. You use APPR LN to define the starting point of the contour with Cartesian coordinates, and APPR PLN for polar coordinates.
Application
Description of function

- The control approaches the contour as follows:
- On a straight line from the starting point PS to an auxiliary point PH
- On a straight line, perpendicularly from the auxiliary point PH to the first contour point PA
The auxiliary point PH is separated from the first contour point PA by the distance LEN.
Tip
If you program R0, the control stops the machining/simulation with an error message.
This behavior differs from the iTNC 530 control.
Programming APPR LN and APPR PLN
Tip
If you want to program this path shape with polar coordinates, then you must first define a pole CC.
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Example APPR LN
11 L X+40 Y+10 R0 FMAX M3 | ; Approach PS without radius compensation |
12 APPR LN X+10 Y+20 Z-10 LEN15 RR F100 | ; PA with radius compensation RR; distance PH to PA: LEN 15 |
13 L X+20 Y+35 | ; End point of first contour element |
14 L ... | ; Next contour element |