Delcam extends range of EDM equipment supported by Electrode software

Delcam Electrode's .Trode file contains all the information for each electrode project, including not only the electrode design but also the machining and inspection information, plus the set-up sheets for its manufacture and use. Scripts are the EDM equivalent of CAM programs for machine tools. They provide an automated process for the programming of the machine, instead of users having to program manually from a set-up sheet. This is much easier and quicker, especially when a number of electrodes are being used on the same component. In addition, the direct link removes the human error that is always be possible with manual programming. All the information in the .Trode file can be included in the script, including the electrode and workpiece geometry and materials; the burn locations, areas and depths; and the various under-sizes for the rougher, semi-finisher and finisher electrodes. The exact output is tailored to the particular equipment; for example, some machines don't accept the geometry, while others run a viewer program which can display the electrode and workpiece geometry, and simulate the sinking process. Using Delcam Electrode, the initial design stage of the process is facilitated by the direct modelling tools available within PowerShape. Users simply define the region where the electrode will be used, extract the shape needed to produce the required feature in the part, and then edit the design to provide clearance from the main surface of the tool and to blend it into the blank size needed to fix the electrode into its holder. Analysis tools are available to check that the draft angles and minimum radii used in the design will not cause downstream problems, while the ability to simulate the action of the electrode ensures that it will operate as expected. To speed the design process further, catalogues of blanks and holders are included from Erowa, Hirschman and System 3R. Users can add their own standard sizes to these databases. Once the design has been finalised, the necessary spark gaps can be specified to provide the machining offsets required in PowerMill to cut the roughing and finishing electrodes. Inspection points can also be added so that the measurement of the electrode in PowerInspect can be automated to a large extent. Then, set-up sheets for the electrode's manufacture and use can be produced automatically, either to a standard format or to a user-defined template. Companies that produce multiple electrodes of similar sizes from the same material can develop templates within PowerMill to machine them in a standard way. Burn, clearance and blank faces of the electrode are automatically colour-coded within PowerShape so that they can be recognised within PowerMill. The size of the material block and the spark gaps for the electrode family are also read from the .Trode file and applied to the toolpaths automatically. Once the templates have been created, generating the machining toolpaths becomes a fully-automated process. Specifying the inspection points within PowerShape means that the probe path in PowerInspect and the production of the inspection report can also be automated, including undertaking a best-fit analysis of the machined electrode. However, all of PowerInspect's flexibility is available if extra measurements are needed from any areas of the part that are causing concern. The results of the inspection are added to the .Trode file for quality control records. The automated generation of set-up sheets for both the machining and application of the electrodes ensures that all the data needed at each stage is readily available. A documentation pack, including the GA and detail sheets, can be issued as drawings, HTML files or Microsoft Excel spread sheets.