Autodesk HSM allows you protect individual operations from getting invalidated when changing the model. This is useful if you have operations that have already been run on the machine, and want to do rest machining from these operations while accommodating changes to the model.
To protect an operation, right-click the operation from the CAM Browser and select Protect from the pop-context menu. Likewise, you can select Protect once more to unprotect it. Once unprotected, the operation is automatically marked invalid and must be regenerated.
Protecting an operation
Once protected, operations are shown in the CAM Browser overlaid with a padlock icon.
The 2D Contour1 operation is protected as shown by the padlock icon
When the model is changed, all unprotected operations are invalidated as normal, while the protected operations remain unaffected and you can continue to use the toolpath as if it is up-to-date.
The toolpath for a protected operation after a change to the model