K40 laser wont fire. Jan 18, 2021 · My K40 laser (XM-4060) has stopped firing when I run a job. Whether you’re a small business owner, hobbyist, or educator working with a CO₂ laser, this guide will walk you through the most common causes (and cures) for non-firing issues. I am able to get light burn to move the laser head, but I cannot get it to fire the laser. Add your thoughts and get the conversation going. Jan 4, 2023 · I have a K40 upgraded to the cohesion board running lightburn. Nobody's responded to this post yet. New K40 won't cut through anything. Still same problem. How to test if the psu or the tube is broken? This being my first Laser experience I may have misstated the problem from the start. Again it still will fire when pushing the test button on the panel and test button on the LSU power suppy. As well as a May 8, 2017 · I have a problem with the laser on my k40. But, it doesn't seem to be cutting through anything at all now. It Does fire when I push the panel test button and it Does fire when I push the PSU test button. Turn the knob on the ammeter to its maximum. It seems that none of my K40 laser control functions work, the power control panel on my machine is inactive. New k40 wont fire except for test button. No laser firing. Changed the home position of gantry to check if safety was getting toggled as sensors were lit red and only flashed nothing changed. It moves like its cutting but doesn’t fire. Now occasionally your tube or power supply may fail and it could be a costly repair. I have replaced the following. You can check it by setting the min/max power to 100% and draw something that lasts long enough to measure the voltage there. The laser will fire when pressing the test button on the potentiometer, so I have dug through the few other instances of this I could find on Apr 9, 2020 · Don, I have installed a lot of new parts and the machine STILL displays the dreaded “No laser signal” and the machine still continues to not fire when cutting. And it doesn't fire when running a job in whispered. Aug 6, 2025 · In most cases, it's a simple oversight or minor issue that can be fixed in minutes. I took all of the safety precautions, running water, connecting the ground terminal, etc. I’ve downloaded the omtech material test file and am trying to run it, but it just never actually fires the laser. I have an OMTech K40+ that is supposed to be light burn compatible out of the box. May 8, 2017 · I have a problem with the laser on my k40. Installed all my upgrades and here is where im at. Adjust both the maximum and minimum power to 100%. The PSU message s…. Everything moves/works fine, except no laser beam coming out. I was sure it was the tube, so I have ordered/received a tube and installed it today. How can I check if it is the power supply? (never heard of a power supply partly failing…) I have a multimeter here. So i just got my k40 last week and have been busy setting it up to get cutting. K40 laser won't fire - power supply issue? I'm not sure if this issue has already been posted here, but I couldn't find it so I'll ask if again. The “LO 5v GND 24v”. I recently bought a 40w K40 laser cutter as my first my first laser cutter. 2 new wire strands that got to the controller board. I’ve checked the following so far but looking to see what else I’m missing: K40 laser won't fire, when I press the test button I hear a fzzz sound. Everything else works. If no laser is being fired, check Diagnose and resolve laser beam firing issues with your K40 laser machine using this formal troubleshooting guide. Jan 8, 2025 · Preface I am a complete beginner to Lasers, but have some experience with CNC. Added pics of setup and console readout. Laser fires just fine from the test button on the power supply but not from the test fire button on the control panel. Following your advice, I attempted a test fire by pushing the test button on the K40 power supply and the result was that the laser did fire. I just got a K40 laser cutter recently, and as of now it's still stock. I found setting it up a little confusing to begin with but I think I've managed to figure most of it out. How should I test this…? thanks for your help. K40+ | Cannot Fire by the Test Button This article is aimed at resolving the issue that the laser won't fire when pressing the test button and is suitable for the following models: Jun 17, 2022 · Only when the laser is firing will this be low. Diagnose and resolve laser beam firing issues with your K40 laser machine using this formal troubleshooting guide. It does frame and move around correctly but doesn’t fire. The PSU message s… Jan 12, 2021 · My K40 laser (XM-4060) has stopped firing when I run a job. Today I'm gonna give you a walk through for diagnosing a potential reason your k40 is not firing. This guide helps you troubleshoot errors or problems with your K40 laser cutter engraver machine if it does not fire the laser tube any more. xfj gze guv otp two ryu eie hik xld kfb emx kuh cjx glp ien