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.

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

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.

Change the following contents as needed:

  • Tools
  • Cutting parameters
  • Feed rates
  • Clearance height or safe position
  • Machine-specific positions (e.g., with M91)
  • Paths of program calls

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.

 
Tip

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 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 Approach functions (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

Number or numerical parameter

Entry: absolute or incremental

Optional syntax element

R

Radius

Number or numerical parameter

Optional syntax element

R0, RL, RR

Tool radius compensation

Tool radius compensation

Optional syntax element

F, FMAX, FZ, FU, FAUTO

Feed rate

Feed rate F

Number or numerical parameter

Optional syntax element

M

M function

Miscellaneous Functions

Number or numerical parameter

Optional syntax element

Note

Example APPR LCT

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.

Change the following contents as needed:

  • Tools
  • Cutting parameters
  • Feed rates
  • Clearance height or safe position
  • Machine-specific positions (e.g., with M91)
  • Paths of program calls

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.

 
Tip

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 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