Microwave sensors work fine through acrylic.... On Tue, Aug 27, 2024 at 8:55 AM Mac Doktor <[email protected]> wrote:
> > On Aug 27, 2024, at 2:37 AM, Adrian Godwin <[email protected]> wrote: > > You can only cut the acrylic with a laser cutter because the material is > somewhat opaque to the laser light. It absorbs it and is melted. If the > material were as clear to IR as it is to visible light, it would be very > hard to cut because the light would pass right through without giving up > any energy to the plastic. > > > I have one quibble with your highly informative posts. Acrylic doesn't > melt, it burns just like wood. There are other materials that you might > call "plastic" that *do* melt and are tricky to impossible to cut using > any wavelength. Many of them also give off toxic chemicals and can catch on > fire. > > Here are some lists of what you can and cannot burn: > > > https://makermade.com/blogs/resource-articles/laser-cutting-engraving-materials-list > > > https://www.troteclaser.com/en-us/learn-support/faqs/unsuitable-materials-laser-processing > > > Avoid PVC like the plague. The chlorine with damage not only your lungs > but also machine parts and the copper traces on the PC board. > > Titanium Dioxide melts. It's extremely white but absorbs the light > anyway—somehow. On ceramic bathroom tile it turns black and fuzes into the > glaze permanently. > > If you have a laser engraver and run the exhaust outside be sure to put > the business end up high. You don't want the neighbors to call the FD every > time you burn something. > > > Terry Bowman, KA4HJH > "The Mac Doctor" > > https://www.astarcloseup.com > > Edward R. Murrow: “Who owns the patent on this vaccine?” > Dr. Jonas Salk: “Well, the people, I would say. There is no patent. Could > you patent the sun?”—*See It Now*, 12 April 1955 > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/1DF5B2FD-E6F7-42C6-81C1-B1CB9AED84F1%40gmail.com > <https://groups.google.com/d/msgid/neonixie-l/1DF5B2FD-E6F7-42C6-81C1-B1CB9AED84F1%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHLWY8q3nUu9m%2BCv5qKBKBJZKeK9oqqyFOMMX-Ke1EJKzg%40mail.gmail.com.
