Summary

The Legacy Post Warning indicates that the selected post processor was created using an older post processor format. This warning does not necessarily indicate that the post processor is defective or incompatible. Instead, it serves as a reminder that the post should be verified to ensure it continues to generate correct NC code.

Beginning with GibbsCAM v11, several changes were made to the posting system, including the transition from the legacy .PST post processor format to the newer .POST format.

Table of Contents

Before You Begin

Before dismissing the warning:

  • Verify that you are using the intended post processor for your machine.

  • Review the posted NC code before running a program on the machine.

  • If available, compare the output against a previously verified program.

Note: A legacy post processor may continue to function correctly. The warning simply indicates that the post was created using an older format.

Cause

Beginning with GibbsCAM v11, changes to the post processing system introduced a new .POST file format.

When GibbsCAM detects that a legacy .PST post processor is being used, it displays this warning to remind users that the post should be validated to ensure it still produces the expected NC output.

Procedure

Step 1 – Identify the Post Processor

Determine whether the selected post processor is a legacy .PST file or a newer .POST file.


Step 2 – Generate NC Code

Post the part as you normally would.

Review the generated NC code carefully before sending it to the machine.

Pay particular attention to:

  • Tool changes

  • Coordinate output

  • Rotary axis commands

  • Canned cycles

  • Safe moves

  • Program start and end sequences


Step 3 – Verify the Output

If possible:

  • Compare the posted output to a previously verified program.

  • Backplot or simulate the program.

  • Perform a safe prove-out on the machine before production.


Step 4 – Update the Post Processor (If Necessary)

If the posted output is incorrect or does not support newer GibbsCAM functionality, contact your post processor provider to have the post updated or converted to the current format.

Expected Result

The post processor has been verified to generate correct NC code. If necessary, an updated post processor has been obtained to fully support newer versions of GibbsCAM.

Additional Information

Why Does This Warning Appear?

Starting with GibbsCAM v11, the post processor architecture was updated, including the transition from the legacy .PST format to the newer .POST format.

Many legacy post processors continue to function correctly, but changes introduced in newer versions of GibbsCAM may affect how certain operations are output. The warning serves as a reminder to verify the generated NC code whenever an older post processor is used.

Common Issues

This warning commonly appears when:

  • Using a post processor originally created prior to GibbsCAM v11.

  • Upgrading to a newer version of GibbsCAM while continuing to use an older post.

  • Using custom post processors that have not been updated.

Best Practices

  • Always verify NC output after upgrading GibbsCAM.

  • Test legacy post processors before running production jobs.

  • Keep post processors updated to support new GibbsCAM functionality.

  • Retain a backup copy of proven post processors before making updates.

Troubleshooting

  • Problem: The Legacy Post Warning appears, but the posted code is correct.

Possible Cause

The post processor is using the older format but remains compatible.

Resolution

Continue using the post after verifying the NC output.


  • Problem: The posted output is incorrect.

Possible Cause

The legacy post processor does not support newer GibbsCAM functionality or requires modification.

Resolution

Have the post processor updated or converted by your post processor provider.


  • Problem: A newer machining feature is not output correctly.

Possible Cause

The legacy post processor was created before the feature was introduced.

Resolution

Request an updated post processor that supports the required functionality.

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Keywords

Legacy Post Warning, Legacy Post Processor, PST File, POST File, GibbsCAM v11, Post Processor, NC Code, Posting Warning, Custom Post, Post Compatibility