Approach function APPR PLCT
Application
With the NC function APPR PLCT, 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 polar coordinates.
Related topics
- APPR LCT with Cartesian coordinates
Requirement
- Pole CC
You must define a pole CC before programming 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 PLCT PR+15 PA-90 R10 RL F300 | ; Tangentially approach the contour linearly and circularly |
To navigate to this function:
Insert NC function All functions Path contour APPR APPR PLCT
The NC function includes the following syntax elements:
Syntax element | Meaning |
---|---|
APPR PLCT | Syntax initiator for a linear and circular approach function tangential to the contour |
PR | Polar coordinate radius Entry: absolute or incremental Optional syntax element |
PA | Polar coordinate angle 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 PLCT
11 L X+10 Y+10 R0 F300 M3 | ; Approach PS with R0 |
12 CC X+50 Y+20 | ; Set the pole |
13 APPR PLCT PR+30 PA+180 R20 RL F300 | ; Approach PA with RL; PH to PA: R20 |
14 LP PR+30 PA+125 | ; Complete the first contour element |