With NC function APPR CT, the control approaches the contour on a circular path tangential to the first contour element.
Coordinates of the first contour point are programmed with Cartesian coordinates.
With NC function APPR CT, the control approaches the contour on a circular path tangential to the first contour element.
Coordinates of the first contour point are programmed with Cartesian coordinates.
The distance of the auxiliary point PH to the first contour point PA arises from the center angle CCA and the radius R.
The circular path is defined by the center angle CCA and the radius R.
The direction of rotation of the circular path depends on the active radius compensation and the algebraic sign of the radius R.
The table shows the relationship between tool radius compensation and the algebraic sign of the radius R and the direction or rotation:
Radius compensation | Algebraic sign of radius | Direction of rotation |
---|---|---|
RL | Positive | Counterclockwise |
RL | Negative | Clockwise |
RR | Positive | Clockwise |
RR | Negative | Counterclockwise |
If you change the algebraic sign of the radius R, then the position of the auxiliary point PH changes.
NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.
Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.
In addition, test the NC programs using the simulation before the actual program run.
With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.
11 APPR CT X+20 Y+20 CCA80 R+5 RR F300 | ; Approach the contour in a tangential circular path |
To navigate to this function:
Insert NC function All functions Path contour APPR APPR CT
The NC function includes the following syntax elements:
Syntax element | Meaning |
---|---|
APPR CT | Syntax initiator for a 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 |
CCA | Center angle as a 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 |
You can switch between the syntax for Cartesian and polar coordinate input in the Form column.
11 L X+40 Y+10 R0 F300 M3 | ; Approach PS with R0 |
12 APPR CT X+10 Y+20 Z-10 CCA180 R+10 RR F100 | ; Approach PA with CCA180 and RR; distance PH to PA: R+10 |
13 L X+20 Y+35 | ; Complete the first contour element |