MPCNC-inspired CoreXY laser engraver

About materials…

Here’s what I do to set up for cutting any material… here, corrugated cardboard.

First, I run the Ryan’s focus script and then lower Z back down to best focus on the top of the material… here about 16mm… and leave it there.

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Then I run a series of 10 lines… full-power, starting at 1000 mm/min feedrate, down to 100 mm/min.

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Flip the test piece and find where the earliest, cleanest through-cut occurs… here, 200 mm/min might work but 100 mm/min will insure through-cuts…

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Then cut the parts. These all look nice and fall out on their own. There’s a slight crown in this piece of cardboard that I usually can just ignore (focus is reasonably good over range of 6mm or so) if it’s not too severe or abrupt…

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– David

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