How Do You Cut Letters in ESPRIT or PEPS for Wire EDM?

After the text is converted into usable curves or engraving features, ESPRIT or PEPS can apply the appropriate CAM operation without separate alphabet software. The key decision is whether the job needs a wire-cut profile, an engraving path, or sinker-electrode geometry.

Machining-Method Decision

1. Identify the required physical result. For wire EDM, confirm that the letters can be represented as profiles through the workpiece. For sinker EDM, determine whether the geometry describes the finished cavity or the electrode used to produce it.
2. Inspect the required character style. Outline fonts create inner and outer boundaries; stroke-style lettering follows character centerlines. Do not move on until the selected style matches the intended cut.
3. Select the first workflow. In PEPS, start with Insert Text. In ESPRIT, start with Create/Engraving. Use CAD conversion and DXF export when the native result cannot be edited into machinable geometry.

Wire EDM removes material along a continuous wire path, so a visually correct font is not automatically a valid wire profile. Sinker EDM adds another transformation: the electrode geometry and cavity geometry have opposite material relationships. Confirm the machining method before editing characters, because this determines which loops must remain and which regions become scrap or electrode material.

PEPS Text-to-Profile Check

1. Open the dimensioning menu and select Insert Text.
2. Enter the required characters and choose the font.
3. Inspect the displayed text for character shape, spacing, and orientation. Treat this as a visual object until its geometry has been exposed.
4. Open the Layers/Figures menu and apply Figure Explode.
5. Select individual character elements. If the segments are selectable as geometry, use them to define the wire profile. If the text still behaves as one annotation object, repeat the explosion check before creating a toolpath.

Figure Explode is the conversion point in the PEPS workflow. The operation makes the character geometry available for profile selection; inserting text alone does not establish that the CAM system can treat every boundary as a cut contour.

After the explosion, check letters with enclosed regions, such as characters containing one or more internal loops. The inner loop and outer loop represent different material boundaries. Select them deliberately and verify their cutting order in the resulting operation. Also check for overlapping segments, small gaps, duplicate entities, and short fragments created by the font conversion. A contour that looks closed at normal display scale can still fail chain selection or produce an incomplete path.

ESPRIT Engraving-Feature Check

1. Open Create/Engraving.
2. Enter the required text.
3. Choose whether to output the text as one feature or as individual features for each character.
4. Inspect feature selection before adding the toolpath. Do not move on until the intended characters highlight as complete features.
5. Add the toolpath and review the generated path independently from the displayed text.

Use one feature when the complete text should be managed as a single machining group. Use individual character features when characters require separate selection, sequence control, repositioning, or local correction. Individual features also make fault isolation easier: if one character fails to generate, inspect that character without rebuilding the complete text block.

The presence of an engraving feature does not by itself decide whether a path is suitable for wire EDM or sinker EDM. Read the operation type and inspect how the path treats each boundary. For wire work, confirm that the selected feature becomes an executable profile with a valid start strategy. For sinker work, use the text geometry as design input and validate the electrode or cavity operation separately.

CAD-to-DXF Fallback Check

Use a CAD intermediate when the native text tool produces unacceptable outlines, limited editability, or geometry that cannot be chained reliably.

1. Create the text in the CAD program.
2. Apply Convert to Curves.
3. Edit the resulting curves. Remove unwanted geometry, close intended contours, and correct intersections or distortions before export.
4. Export the corrected geometry as DXF.
5. Import the file into the CAM program and confirm scale, orientation, character spacing, and loop closure.
6. Select every required contour and verify that no text entity remains dependent on the original CAD font.

Curve conversion removes the dependency on how the receiving CAM system interprets a font object. The DXF carries geometric entities instead of editable typography. This makes the result portable but moves responsibility for contour quality to the CAD cleanup stage.

If the imported letters appear at the wrong size, stop before creating toolpaths and compare a known dimension between CAD and CAM. If characters are mirrored or reversed, determine whether the error came from the drawing view, export orientation, electrode relationship, or CAM setup. Correct the geometry once; do not compensate with an unverified machine-side orientation change.

Contour and Toolpath Diagnostics

For wire EDM, review the start location and access to every independent contour. A closed internal profile requires a practical wire-entry strategy defined by the job setup. Very narrow strokes, sharp corners, or closely spaced boundaries may also be unsuitable for the selected process even when the CAM system accepts the curves. Compare the smallest geometric features with the machine, wire, setup, and required accuracy before releasing the program.

Resolving Workflow and Verification

1. Confirm whether the operation is wire profiling, engraving, or sinker-electrode work.
2. In PEPS, create the characters with Insert Text, apply Figure Explode, and verify that every required boundary is selectable geometry. In ESPRIT, create the text through Create/Engraving, choose one feature or individual character features, and add the appropriate toolpath.
3. If native geometry fails selection or needs substantial editing, create the text in CAD, apply Convert to Curves, clean the curves, and transfer them as DXF.
4. Check all characters for open chains, duplicates, intersections, and unintended fragments. Inspect inner and outer loops separately.
5. Generate the operation and compare the toolpath with the intended retained and removed material. Confirm scale and orientation against a known drawing dimension and the finished-part view.
6. Run the CAM simulation or path verification available in the installation. Review every character, entry location, contour sequence, and completed boundary before releasing machine code.

FAQ