Approach function APPR LCT
Application
With the NC function APPR LCT, the control approaches the contour on a straight line, followed by a circular path tangential to the first contour element.
Coordinates of the first contour point are programmed with Cartesian coordinates.
Related topics
- APPR PLCT with polar coordinates
Description of function
This NC function encompasses the following steps:
- A straight line from the starting point PS to the auxiliary point PH
The straight line is tangential to the circular path.
The auxiliary point PH is determined based on the starting point PS, the radius R and the first contour point PA.
- A circular path in the working plane from the auxiliary point PH to the first contour point PA
The circular path is uniquely defined by the radius R.
If you program the Z coordinates in the approach function, then the tool approaches simultaneously in three axes from the starting point PS to the auxiliary point PH.
Input
11 APPR LCT X+20 Y+20 Z-10 R5 RR F300 | ; Approach the contour on a tangential circular path |
To navigate to this function:
Insert NC function All functions Path contour APPR APPR LCT
The NC function includes the following syntax elements:
Syntax element | Meaning |
---|---|
APPR LCT | Syntax initiator for a linear and circular approach function tangential to the contour |
X, Y, Z, A, B, C, U, V, W | Coordinates of the first contour point Fixed or variable number Entry: absolute or incremental Optional syntax element |
R | Radius as a fixed or variable number Optional syntax element |
R0, RL, RR | |
F, FMAX, FZ, FU, FAUTO | |
M |
Note
The Form column allows toggling between the syntaxes for Cartesian and polar coordinate input.
Example APPR LCT
11 L X+40 Y+10 R0 F300 M3 | ; Approach PS with R0 |
12 APPR LCT X+10 Y+20 Z-10 R10 RR F100 | ; Approach PA with RR; distance PH to PA: R10 |
13 L X+20 Y+35 | ; Complete the first contour element |