To Set Up the Coordinate System for Correct CL Output

In Creo NC, the NC Sequence coordinate system must have the Z-axis colinear with the turning axis; thus the turning cut is sketched in the ZX plane. If your post-processor requires XY input, set up separate Machine and NC Sequence coordinate systems, with the Machine coordinate system axes pointing in the desired directions for correct post-processing. In this case the system will output CL data in the XY coordinates without the transformation vector (i,j,k).

The following illustration shows setting coordinate systems for XY output:

1. NC Sequence coordinate system orientation

2. Machine coordinate system orientation

The Machine coordinate system can be created at any location and using any option, as long as its axes point in the appropriate directions. An easy way to create a Machine coordinate system by referencing the NC Sequence coordinate system is described below.

1. Orient the NC Sequence coordinate system so that the Z-axis is colinear with the turning axis and points away from the lathe headstock.

2. Create another coordinate system using the Offset option and select the NC Sequence coordinate system.

3. On the MOVE menu, click Rotate.

4. Click Y Axis and enter -90.

5. Click Z Axis and enter -90.

6. On the MOVE menu, click Done Move. The coordinate system is created.

If there is no translational offset, the NC Sequence coordinate system will not be visible after the Machine coordinate system is created. Use Sel By Menu for coordinate system selection. |