3d engraving with DC tube lasers

[Doug Fisher]

You might enjoys watching Russ' recent two part video with his experiments trying to understand 3D engraving on a glass tube laser. He isn't teaching or saying he is always right but just letting people follow along as he experiments and learns.

https://www.youtube.com/watch?v=pzropA_AcL8

https://www.youtube.com/watch?v=6F32EjrQLDQ

I have seen better output from attempts at 3D engraving with glass tube lasers but Russ is always entertaining to watch.

[Dave Sheldrake]

It's the rise time of the tube from excitation to emission

DC takes time, RF is almost instantaneous , DC also suffers with Q Spike, the initial pulse from the trigger current fires a higher power blast for a fraction of time