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Need to buy a DIY/High School grade laser cutter/engraver

How much laser power is needed for wood, acrylic (3 to 6mm thick), cutting and decorative engraving?

What parameters I need to take care in selecting suitable machines?

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  • $\begingroup$ I edited to clarify 3 to 6mm thickness for acrylic robot base plate cutting $\endgroup$ – EEd Aug 13 '14 at 12:46
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For such results the laser should have a power of 2-3Watts

You can have a look at different projects like this here at kickstarter: https://www.kickstarter.com/projects/1537608281/lazerblade-the-affordable-laser-cutter-engraver

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