qr code laser engraving,RFH 355nm laser is the best choice

customer reviews

I got one of these machines for glass Crafts.  So why buy this one? Quality and features. Unlike the cheaper ones, this machine clearly underwent a QC process prior to shipment. It arrived ready to use. The laser were adjusted well enough to use the machine right out of the box. And adjustment screws were retained with silicone to prevent movement in shipping.  

I was happily surprised with the extras that are included. You get the aiming uv laser, a strip of LEDs that illuminate the inside of the box, a powerful internal fan motor, temp sensors on the power supply and the tube, and venting of the electrical compartment. I thought I would have to add these myself. The only thing missing is an "open-door" shutoff switch for safety. You can easily add one of these with a microswitch and a two wire cable to the K+ - pins on the power supply. Finally, a word about safety. Since you can't see the beam, it does not trigger a blink reflex. The first you know of a problem is when your retina boils. Really. If you get one of these machines you MUST purchase a set of safety glasses. Wear them whenever the machine is powered on, whether the laser is active or not. Make sure the lenses you buy are marked with the proper wavelength and an "OD" number, representing factor of 10 reduction.  Overall I am very happy with this purchase.

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