Nightmare on Lexan

So I tried to mill some 1/4″ Lexan (Plexiglas) and had the feed rate a little too high. After running for a few seconds with chips flying all of a sudden the V-wheels and assembly of the Shapeoko started making these thumping noises.

Turns out that the Lexan chips that were thrown about were molten and landed on the Makerslide V’s and froze there, adding “speed bumps to the road”, as it were.

After carefully scraping off the Lexan chips with my fingernails, it runs like new.

Next: Add small vacuum hose on the spindle to prevent this in the future.

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