Aligning the lasers on a K40 Laser Cutter This is one of the most time consuming parts and most frustrating when you first get the machine. link to Don's K40 research and development;http://donsthings.blogspot.com/ See more ideas about co2 laser, laser, fun projects. Think of a Concept. My first problem was deciding which laser to buy. Now I have to find a way to tell my husband thAt I bought this machine…, Show him this website and he´ll probably be okay with it as a safe machine to use, and probably join you with the adventures making stuff with it . Check out Hawklaser spare & upgrade part store here. Here is the facts about the laser power supply installed in most K40 machines with complete pinout and wiring for the different types. How to troubleshoot no fire issue. This is so helpful. 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The amount of current flowing from the machine case to the earth through your heart depends on how well your feet are connected to the earth, but it might be enough to kill you. How to identify and fix this problem. Some bolts has a plastic spacer, you might need this. Build. You do not need a cable on the outside of the machine if you have 3 prongs from your wall outlet. ... Chinese laser cutter axis problem - Duration: 0:18. jkcajkca 3,908 views. 10.10.2015 : fix attempt 4 ... Plus, now there is a new problem. + Update your shipping location 7 S 0 P O N S O A R P A 7 E E D-1-1 U J-1 0 F J-1-1. I use two toothed/serrated washers closest to the metal. Get a email notification as soon there is a new article published. Thus, an electrical fault CAN’T charge the case to a high voltage relative to ground, because the case is connected directly to ground. I purchased my Chinese laser cutter with the underwhelming M2 Nano mainboard. It drove me absolutely bonkers when I first got my machine, and I’d guess that 90% of your problems will be caused by misaligned mirrors. Class 4 lasers require a complete enclosure that prevents even accidentally reflected laser light from escaping the enclosure, and also requires safety interlocks to stop the laser firing if the enclosure is opened. LINKS. Just got one of these and was worried about the earth ground in manual. Links. Remove ALL plastic/nylon washers from the ground bolt, only use metal washers. Can you please explain where it will go? The K40 style lasers all produce so much laser power that they’re in the most dangerous Class 4 category per the FDA’s rating scheme. 0: 0: No posts have been made on this board. K40 Power Supply, Let’s have a look which one to buy, How to Crop in Inkscape – Cropping an image, Jewellry Engraver fever. I intend to do the upgrade once i am confident with using the laser but for now i’ll use it as it is. So the machines are built by their standard, when we in EU or US or other parts of the world often have a good ground setup already in our homes since many years. New PSU, new tube. Do I need to perform these steps but not use the ground from the post on the machine? Just make sure the metal is clean so the ground bolt has proper connection. 4: 4: CNC Zone Forum by Coherent Dec 4, 2015 5:20:41 GMT -7 ... a K40 laser cutter project - Duration: 2:49. The dark side – safety issues. Thanks for sharing the grounding information. In a nutshell, the laser power supply that comes with a K40 laser cutter will push out roughly 30-35mA which will force more power through the tube than it is rated for. Use abrasive paper or a knife to scrape away some paint around the hole for the ground bolt. Here is a method that works for Windows XP through Windows 10: 1. BUR have realised its not earthed. If the beam is weak or just pulses for a half second, your tube or PSU might be out. Take a look in the article and follow the steps and it will probaly solve your issue. 2) You’re standing on the earth, so your feet are somewhat connected to the earth. On my K40 I confirmed that the red external ground plug is connected to the house wiring’s ground, but the metal case is NOT. When I test fire there is a clicking sound and I think there is some blackening at the business end but no laser. À lot of the K40 machines i’ve seen have the CE mark on it meaning that it Looking at a laser while working on your projects can cause permanent eye damage if the source isn’t … I positioned the cutter around 197x : 60y where it engraved just fine. LEDs for 220volts, a lot of them can be simply touched on the 220v parts. À big compliment About Your website, very helpfull, thanks. But, the bolt itself are often isolated from the machine case which is a big problem, first off for your safety, second for the current regulations and laws about machines with high voltage. Both inside and outside. I was wondering why it would need additionally grounding. The gantry works well and there is power to the sight dot which is not good. One (bad) trick I was shown by my previous employer was, if you’re installing a new outlet and don’t want to go and find what breaker it’s on, touch the live to the ground and it will trip the breaker, therefore making it “safe” to switch out the outlet. Open the windows device manager. Out of the box the K40 is a perfect tool to destroy your eyesight, kill you by an electric hock and burn down your house. If it doesn´t, check the fuse in the rear power connector before continuing. I see a loop back to the grounding. Make sure your laser cutter is connected to your computer via a USB cable and Turn on your K40 Laser Cutter: Step 2. Arcing at -50% pot value, at 50% + the audible arcing seizes but tube still fails to produce beam. Thanks in advance. Start with removing the ground bolt from your machine. Read my article about Setting up your laser But focus on the grounding first, then look in to the problems. Modded Smoothieware Chinese K40 Laser Cutter Overview - Duration: 33:26. There are a few ways to open the Windows Device Manager. Where should I not see water? Didn’t quite understand where the grounding cable must go when inside the machine! Now mount the bolt in your machine again. I am not knowledgeable what-so-ever with electric so please use easy terminology. In China, the electric standard is not well built and many houses still do not have ground solutions in their house. From my research, I found that the reason for grounding is that if a high voltage wire were to come in contact with the case, and it was grounded correctly, there would be a surge of current from the live wire, to the ground, which would trip the breaker. This guide will help you identify and solve most problems with your laser machine not firing the laser beam. 90% of the errors in laser machines are not skewed or non-square gantrys, it´s bad alignment of the three … In this scenario, I am cutting out a lucky charm pendant, but feel free to vary … Here is a picture how a good ground bolt is fastened to your machine. WayofWood 4,132 views. Is this meant for US owners also? Feb 12, 2019 - Dedicated to the inexpensive K40 Chinese hobby CO2 laser that are the most affordable lasers to get us all started. Store; Docs; Contact; K40 LASER Cutter. 40W K40 CO2 Laser Stamp Engraving Cutting Machine Laser Engraver Cutter USB ... K40 Laser Cutter Honeycomb Bed 320*220mm Co2 Laser 40W Engraver Machine Parts. But if there was life-threatening contact, the breaker should trip.. Most cheap chinese laser cutters have the ‘M2 Nano’ board installed, same for my machine: The above M2-Nano board picture shows on the bottom the two stepper motor cables plus the connection to the laser power supply (blue: LO (Laser Out), 5V, GND and 24V input. The K40 is not, i repeat, not a plug-and-play laser machine. Try put a jumper between P and GND, or P+ and P- depending on PSU. My house was built in 2003 in USA so it has all grounded outlets. (Another way to look at it: the grounding wire provides a much lower-resistance path to the earth than your body does, so 99.999% of the current flows through the grounding wire and not through you.) But if I read this right, you do NOT need to run a wire to an external earth ground if you have a three-prong outlet, like we have here in the US, correct? Is this overkill??? C $55.95. Make sure your K40 turns on and homes to zero position. Should have been tested accordingly to the CE safety standard. That tells me the only contact between the case and ground bolt was the edge of the hole drilled into the case. Fake CE markings, some call it “chinese export” and not the real Conformité Européenne, I have just installed a new K40 laser in my shed. I see sense in your theory, but I’m pretty sure that the breaker gets blown once the live touches the ground (and short circuits). If you have just bought a new K40 laser cutter or have replaced your mirrors, chances are that you are going to need to align your mirrors Although this demonstration is using a 50W ebay Chinese laser cutter, the principles are the same if you Which wood can the K40 cut? The problem is often the ground bolt in the back beeing isolated from the casing, this is where the ground from the wall outlet should have 100% contact with the metal. Laser safety glasses / goggles for K40 laser cutter These Goggles have been specifically designed for use with Co2 laser engraving machines, including the k40 laser cutter. House is grounded. I don’t like it for a few reasons; the first being it’s small. The K40 can cut and engrave quite a few other things such as Linoleum for stamps and a lot of other things . But for us who think the case ground is properly done – it can and will kill you! The K40 is a product made with parts to make a small and cheap laser machine. Turn a cheap EBay LASER cutter into a LASER cutting power house using the Buildbotics CNC controller. Loading... Unsubscribe from Caleb Kraft? I can give the electrical safety theory behind this. People are getting confused because it reads like if you live in the US or UK you don’t need to use the rear ground bolt. In China they do this because the grounding is external and not inside the cable from their wall outlets. The white connector on the right is for the end stops (GND, YL, XL, GND and NC). If not, you have bad grounding to your shed. Article by Richard Grisafi. I have one of the larger Redsail x700 clones and my electrician installed an exterior earth ground when I had him wire a dedicated 20a circuit for the unit. Bad advice yes, but shows the live to ground tripping the breaker does in fact happen. But the laser power is off or simply a little pulse at the corner. K40 Laser Cutter – the cheap Chinese hobby laser cutter. Share your good, bad or deadbeat vendor experiences here. The K40 comes with this spring loaded clamp deal that holds your workpiece in place by squeezing it on the sides. Look at the inside near the plug input. If it´s overkill or not depends on your buildings ground status. More and more machines are delivered with deadly configuration on the grounding of the electronics. Also, I’m guessing my case ground post is not making good contact. k40 laser cutter issue with outline function. the gantry is okey. I have a feeling there might be water in the wrong places too but not crack and no water leak. This is where the ground from the wall is bolted down, it has to be 100% good contact. my laser engraver JK-1390, stopped burning while running Dustin Corbin 131,300 views. how can I solve this problem? The internal electronic parts are grounded to the ground bolt in the rear of the machine, so is the ground line in the cable you plug to your wall outlet. Definitely want to be safe using this thing. Links to vendors, forums, groups or web pages related to small C02 lasers. This is a short warning with information how to solve the issue. Making Protective Face Visors with a K40 Laser Cutter by si Apr 7, 2020 10:07:37 GMT -7: Vendor Reports. Remove all plastic shit and remove paint and ground the machine case properly and it works great, no matter if you use the ground rod or a good wall outlet ground. Here’s the danger scenario that is prevented by this upgrade: 1) The machine gets some internal damage, such that a high-voltage wire starts touching its metal case (for example, the laser tube breaks and the high-voltage line of the laser supply touches the case). In other words, the ground wire forces the case to the same electrical potential as the earth (and you) so that touching the case won’t shock you. I followed your grounding instructions with the nasty blue wire supplied but still no luck. Now there’s high voltage between your hand and your feet, causing a current to flow through your heart. Ground bolt on the K40 laser machine with external ground. The 40W eBay Chinese K40 Laser Cutter. While this is true, the bolt still MUST be in good contact with metal case. You can also use loctite or two nuts. Most problems with the K40 laser cutter involves the power supply in one way or another. The K40 is a cheap laser engraver/cutter… If you have a ground rod, use it. 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