Quote Originally Posted by silyavski View Post
Hi, some questions, if you can shed some light:

-what goggles you use for adjusting and looking at whats going on? i have been looking at Eagle Pair® 190-540nm OD4+, what exactly would i need to see when adjusting and working with the laser?

-Is this driver ok? I am considering it, cause its here in Europe
http://www.ebay.es/itm/161353680119?...84.m1423.l2649

-How to adjust the driver to 2.4A so it would not burn the diode, cause it can output up to 3A. i searched for this, but as am really not into electronics


- i am looking at the Nichia NDB7875, very roughly maybe equivalent to your 2 diodes. is it better to buy a double driver and in the future fix 2 of them and achieve ~5-6W. I mean is there any real benefit, for engraving in general and gray scale engraving?
Those laser safety glasses will be fine for adjusting and watching progress of the engraving. That is a good analog/TTL driver and I would recommend it. The driver should have instructions for setting the threshold and maximum output amps. That is what the potentiometers are for on the driver board. The Nichia NDB7875 is what we are using. The advantage of engraving greyscale is it gives you better shading results compared to pulsing the laser and creating allot of dots to get shades.