There is a 1600mW laser which is class 4 and 445nm in frequency. Try moving the module around 34mm from the surface of your workpiece. Turn the lens aperture ring as tightly closed as possible and jog the module up and down in 0.1mm steps once you are at 34mm in Z height above the workpiece. As you are jogging the laser module, the laser will illuminate but at low power. Wear your safety goggles when doing this… even the low power light can be harmful. You are aiming to get the beam to its minimum spread, which is around .5mm so think full stop/period on a printed page.
The laser beam should look like this when focussed…
Once focussed it is very capable of producing nice results.