Linear superimpositioning of a circular path

Application

You can linearly superimpose a movement programmed in the working plane, thereby creating a spatial movement.

If, for example, you superimpose a circular path, you create a helix. A helix is a cylindrical spiral, such as a thread.

Description of function

You can linearly superimpose the following circular paths:

  • Circular contour C
  • Circular path C

  • Circular contour CR
  • Circular path CR

  • Circular contour CT
  • Circular path CT

  •  
    Tip

    The tangential transition of the circular path CT has an effect only in the axes of the circular plane and not additionally on the linear superimpositioning.

In order to superimpose a linear movement onto circular paths with Cartesian coordinates, additionally program the optional syntax element LIN. You can define a main axis, rotary axis or parallel axis (e.g., LIN_Z).

Notes

  • You can hide the LIN syntax element via the settings in the Program workspace.
  • Settings in the Program workspace

  • Alternatively, you can also superimpose linear movements with a third axis, thereby creating a ramp. A ramp allows you, for example, to plunge into the material with a tool that is not a center-cut tool.
  • Straight line L

Example

A program section repeat allows you to program a helix with the syntax element LIN.

This example shows an M8 thread with a depth of 10 mm.

The thread pitch is 1.25 mm. Thus, for a depth of 10 mm, eight thread grooves are required. An initial thread groove is also programmed as an approach path.

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 Z+1.25 FMAX

; Pre-position in the tool axis

12 L X+4 Y+0 RR F500

; Pre-position in the plane

13 CC X+0 Y+0

; Activate the pole

14 LBL 1

15 C X+4 Y+0 ILIN_Z-1.25 DR-

; Cut the first thread groove

16 LBL CALL 1 REP 8

; Mill the following eight thread grooves, REP 8 = Number of remaining machining operations

This solution directly uses the thread pitch as the incremental infeed depth per revolution.

REP shows the number of repetitions required for reaching the calculated ten infeed runs.

Subprograms and program section repeats with the label LBL