Process

A safe retraction geometry is defined as the geometry that would create an escape channel using the retract strategy set at the point of interruption. The end position of the retraction is always defined as the starting point of the “path erosion” geometry. The two figures below show an example of machining up to an interruption followed by retraction after the interruption. The plane strategy at the point of interruption in the example is set as the retract strategy.

If a CNC error occurs, the required data is saved automatically by the CNC. The save_retract_data control unit is provided in the event of a power failure or other cases where the user must save data for a future retraction. If the save process is triggered, it must be ensured that data is saved only after the CNC comes to a standstill.

Restrictions

• Retraction geometry does not consider whether the electrode was located in the equidistant section at the point of interruption. In this case, therefore, the retraction geometry does not have exactly the same transition as a retraction with the system escape channel before the point of interruption.
• The user must save the necessary parameters for the CNC cycle at the point of interruption himself and transfer the data to the CNC when the CNC cycle is called.
• The channel parameter P-CHAN-00865 must be set in order to save the data.
• This cycle requires the EDM-Plus license.