Hey, I’ve recently bought a K40 laser and tested it today. Sadly when I tried to test the laser there is just some crackling noise and arcs from the red wire “small white box” from the picture. I don’t see any water leaking into the tube so I assume the tube isn’t broken or anything. I’m kind of …

Ok, little update, I’ve contacted the supplier and they gave me a new PSU, it dind’t work then after some talking with the support I got a new tube and now everything works. I first replaced the PSU tried firing, nothing, then I replaced also the tube, tried firing it again and it worked seems to …

that white box is most likely a splice which was done poorly so you can probably fix this by doing a proper splice. High voltage likes to jump off any sharp points so if you google for how to splice laser tube wires you should see many ways which result in no ends of wires sticking out and probably…

[image] Alex2070: The ground wire is connected to the frame, the mA meter always stays on 0. An unloaded LPS will arc from almost any weak point even a splice and sometimes directly from the anode. The fact that you have 0 ma on your meter may mean that the cathode is not grounded or the tub…

Ok here’s a picture of my PSU and a video of the now suddenly nonexistent arcing, somehow it stooped. Hope it’ll give you more information. Video: -First click (machine powering on) -All the clicks after that (Pressing the laser test button) -You can hear some sizzling sound I guess it comes fr…

Caution: It looks like the cover may be off of the LPS? It’s not necessary to be inside the LPS at this time. This high voltage CAN KILL YOU so stay away from it!!! Video: I don’t see any plasma illuminated in the tube. There should be a purplish line of plasma down the inside of the tube when i…

Ok, one question at the time: Is it there and I cannot see it?? There’s no illumination. Is there coolant in that tube? If so what is it? Yes and i use distilled water. What about the answer to this question below? I followed the cathode wire and it goes from the laser tube to the current mete…

Ok seems that there is no HV power to your laser, the next step it to do this: [image] donkjr: Try this: Fire the laser with the test button down on the LPS. Does that fire the laser (plasma) and/or arc?

There’s no Arc and no glow (plasma) in the laser tube.

Is this when you press the test button down on the supply?

Yes, I’ve tried both test buttons and nothing worked.

Laser wire arcs to frame

Lasers

mcdanlj (Michael K Johnson) July 8, 2021, 10:27pm 3

K40 Intro at the top of every page here links into the Lasers > Getting Started with CO2 Lasers section, including this article with resources on splicing correctly: