Pen Plotter Holographic Engraving

A maker with a pen plotter who wants to experiment with holographic engraving first imports an SVG design or simple 3D model, then selects the plastic sheet, metal film, or coated paper they have on hand. Before machining begins, the product asks the machine to draw a small calibration pattern. The user photographs it with their phone, and the system uses the image to measure pen pressure, material reflectivity, and mechanical positioning error.

Once calibrated, the design is split into multiple sets of fine engraving paths, each corresponding to a different viewing angle. The screen shows how to rotate the material, which pen to swap in, and what effect will appear when that pass is complete. Users can also drag a virtual light source to preview the design’s highlights, shadows, and parallax at different angles before deciding whether to begin the final run.

While the plotter works, the app sends paths one pass at a time rather than generating a long job that is difficult to inspect. If a pen skips or drifts during a pass, the user can upload a photo and recalculate from that pass instead of discarding the entire sheet. Once finished, the project is saved as a reproducible recipe containing the material settings, calibration results, and engraving paths.

An initial release need only support common desktop plotters, flat designs, and a small set of material templates. By breaking complex optical design into one calibration step and several visible passes, it lets makers produce their first angle-shifting piece in a single evening.