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Definitely not competitive with an experienced operator on a real IBM 029 keypunch machine
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Somewhat to my surprise, the gritty nature of the bitmap source image didn’t cause a problem.
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I infer that the ERP fans weren’t entirely satisfactory, but that’s just a guess.
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I’m sure something different has come along in the last third of a century
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The top view shows the height map press nested inside the cutter blade
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It turns out that a PGM (“Portable Graymap”) file is almost exactly what we need
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Low res also speeds up the OpenSCAD processing
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Some doodling indicates that a simpler solution may suffice
The Smell of Molten Projects in the Morning 