Re: FS: Sanwu Laser store - R/G/B handhelds x3 BE & Stainless steel "The Spiker" rele
People have asked me how to set up the 3X Beam Expander with a 3 element lens on the mighty NUBM44 diode.
The best burning spot I get is by setting the focus of the 3 element after you screw it into the little adaptor to about a half square, not a sharp line at about 15-20 feet and that will also become a square shaped spot at 80-100 feet, because the BE works on both axis you don't want to focus your 3 element to the sharp line or your spot will look like a line with a shaded box under it.
NOW if you get a NUBM05,06,07,08 that the GBall makes a half square box anywhere in the 10-20 foot range just use a 3 element lens barrel with the lenses and spacer removed, simply unscrew the ring from the back and dump everything out and use that to screw into the little adaptor and simply use a spacer or washers so that it screws into your 12mm diode module without crushing the GBall, this works well as the GBall is very efficient and makes a strong burner.
Screw the empty 3 element barrel into the adaptor so that the wide end faces out, it will countersink around the GBall giving you more threads but still use a couple of washers so you don't crush the GBall. You can see in the pic ( NUBM44 build ) I used a cutout paper washer made of black construction paper to get a good half square focus, it's a minor adjustment to get it right but well worth it. Note the paper is just 1 piece thick, I simply did not clean off the bits of extra that stick to my washers.
This is by far the best way I have found to use the Gball diodes with lens intact, of course some factory focus settings are better than others, but with the can window diodes such as the 44 stop at a tight line at 15-20 feet then back out a fraction of a turn to get a half square, it makes the hottest burning spot in my testing and makes focusing to a clean bar easier once the expander is installed, they are fantastic.
This is a nubm06 lighting a damp paper bag with cardboard inside using the factory GBall and a sanwu 3X.
