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Topics - alurpal

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General Discussion / Are the green glasses from Chinese kits safe?
« on: July 12, 2016, 07:18:48 AM »
Obviously, I am not shining the laser directly into my eyes, nor is the laser facing any direction but down.

But I know some lasers can cause damage just with reflections. I am using a 2500mw laser from gearbest.

From browsing the laser safety wikipedia page:, am I correct by assigning a class 3R to my laser?

Thanks guys!

General Discussion / UV 2500mw laser focal point size
« on: June 27, 2016, 08:13:19 AM »
Hi everyone,

I am waiting on the delivery of my 2500mw laser from gearbest and was wondering what is an achievable focused beam size. I'd like to engrave small, detailed images on wood and silicone if possible but am trying to understand my hard limitations. I assume the real trick is getting the engraved medium set up at the correct height to intersect the focal point? Does anyone know the beam width at the focal point for a cheap, Chinese UV laser?

BTW, I am planning to flash latest compatible grbl firmware to enable pwm with the jumper mod.

Thanks guys.

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