I see a loop back to the grounding. The sad result is that the gases inside the laser tube will start to degrade if you push too much power through the tube. Turn a cheap EBay LASER cutter into a LASER cutting power house using the Buildbotics CNC controller. The K40 is a product made with parts to make a small and cheap laser machine. I purchased my Chinese laser cutter with the underwhelming M2 Nano mainboard. À lot of the K40 machines i’ve seen have the CE mark on it meaning that it This guide has some tips and hints regarding the popular K40 laser machine type, but this can be used for any laser machine on the market as the science behind a laser mirror alignment is the same on all of them. Thanks for sharing the grounding information. Brand New. 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. 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. Bad advice yes, but shows the live to ground tripping the breaker does in fact happen. Dustin Corbin 131,300 views. If you have a ground rod, use it. Overall this is a good machine but it leaves a lot to be desired and the quality control is certainly lacking. Should have been tested accordingly to the CE safety standard. Making Protective Face Visors with a K40 Laser Cutter by si Apr 7, 2020 10:07:37 GMT -7: Vendor Reports. House is grounded. 10.10.2015 : fix attempt 4 ... Plus, now there is a new problem. This is much better solution. Read the electric warning article i wrote a while back, in the FAQ menu. 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? 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. The white connector on the right is for the end stops (GND, YL, XL, GND and NC). Here is the facts about the laser power supply installed in most K40 machines with complete pinout and wiring for the different types. The K40 comes with this spring loaded clamp deal that holds your workpiece in place by squeezing it on the sides. After that you can start by checking out the “no fire troubleshooting” guide to find out more what your machine can have trouble with. The K40 is a cheap laser engraver/cutter… There are a few ways to open the Windows Device Manager. eBay and Alibaba are riddled with auctions from sellers with different versions of the K40. I followed your grounding instructions with the nasty blue wire supplied but still no luck. More and more machines are delivered with deadly configuration on the grounding of the electronics. Links to vendors, forums, groups or web pages related to small C02 lasers. 4: 4: CNC Zone Forum by Coherent Dec 4, 2015 5:20:41 GMT -7 This will disable the safety feature, some machines has a flow sensor on this, some is just bridged. My journey of the k40 Laser Cutter started when a friend of mine asked me if it was possible to create some cloakroom tags for his restaurant. LEDs for 220volts, a lot of them can be simply touched on the 220v parts. Use abrasive paper or a knife to scrape away some paint around the hole for the ground bolt. Also, I’m guessing my case ground post is not making good contact. Definitely want to be safe using this thing. 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. LINKS. See more ideas about co2 laser, laser, fun projects. I am not knowledgeable what-so-ever with electric so please use easy terminology. So, the point of this upgrade is to properly connect the metal case to earth ground. À big compliment About Your website, very helpfull, thanks. Not needed if you have proper ground in your wall outlet! But if there was life-threatening contact, the breaker should trip.. Think of a Concept. The ground from the 3 prong connection swings over to the bolt. BUR have realised its not earthed. Loading... Unsubscribe from Caleb Kraft? Welcome to the ultimate K40 mirror alignment guide for your k40 laser cutter machine. Now mount the bolt in your machine again. Thanks in advance. Get a email notification as soon there is a new article published. The chinese give à damn About these safety standards, just look at the cheap K40 LASER Cutter. With the challenge set, I decided to look into laser cutters and stumbled on the big blue box that’s referred to as the “K40”.. New PSU, new tube. + 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. Build. My first problem was deciding which laser to buy. I use two toothed/serrated washers closest to the metal. my laser engraver JK-1390, stopped burning while running The manufacturer connects the machine’s metal case to the earth via your house’s ground wire (the center prong on the three-prong plug). 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. part 2 of a troubleshooting series. It is very dangerous with high voltages that can and will kill you if you aren´t cautious. This is where the ground from the wall is bolted down, it has to be 100% good contact. 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. K40 Power Supply, Let’s have a look which one to buy, How to Crop in Inkscape – Cropping an image, Jewellry Engraver fever. If you have a 3-prong outlet from your wall, you do not need (and should not) ground it from the ground bolt. Your clothes dryer, power tools, etc all have grounded cases for this reason. I suppose if there wasn’t good contact with the live wire and the case, it may not trip the breaker. C $55.95. … 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. I live in the UK and have a 3 prong plug for the power supply… Can you advise what I need to do? 0: 0: No posts have been made on this board. Ground bolt on the K40 laser machine with external ground. Feb 12, 2019 - Dedicated to the inexpensive K40 Chinese hobby CO2 laser that are the most affordable lasers to get us all started. 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But for us who think the case ground is properly done – it can and will kill you! 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. How to identify and fix this problem. 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. Modded Smoothieware Chinese K40 Laser Cutter Overview - Duration: 33:26. But focus on the grounding first, then look in to the problems. I’ve had my 40W Laser Cutter for just over three months now and I feel that I’ve got a good grasp on how it operates. Both inside and outside. Now there’s high voltage between your hand and your feet, causing a current to flow through your heart. If it´s overkill or not depends on your buildings ground status. Looking at a laser while working on your projects can cause permanent eye damage if the source isn’t … Read my article about Setting up your laser Here is a method that works for Windows XP through Windows 10: 1. Check out Hawklaser spare & upgrade part store here. In China, the electric standard is not well built and many houses still do not have ground solutions in their house. While this is true, the bolt still MUST be in good contact with metal case. Links. 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. My house was built in 2003 in USA so it has all grounded outlets. I positioned the cutter around 197x : 60y where it engraved just fine. The K40 can cut and engrave quite a few other things such as Linoleum for stamps and a lot of other things . The case is now just sitting there with a high voltage relative to the earth, waiting for you to touch it. link to Don's K40 research and development;http://donsthings.blogspot.com/ I intend to do the upgrade once i am confident with using the laser but for now i’ll use it as it is. That problem is work holding. Save k40 laser to get e-mail alerts and updates on your eBay Feed. Start with removing the ground bolt from your machine. Make sure your laser cutter is connected to your computer via a USB cable and Turn on your K40 Laser Cutter: Step 2. Use abrasive paper or a knife to scrape away some paint around the hole for the ground bolt. If it doesn´t, check the fuse in the rear power connector before continuing. Store; Docs; Contact; K40 LASER Cutter. This guide expect that your ground wiring where you have the laser is up to code. This guide will help you identify and solve most problems with your laser machine not firing the laser beam. Arcing at -50% pot value, at 50% + the audible arcing seizes but tube still fails to produce beam. 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. WayofWood 4,132 views. K40 Laser Cutter – the cheap Chinese hobby laser cutter. These are links to the other tutorials I have made about important subjects of laser cutting. 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. 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 . Ground wire goes to the ground bolt, and the bolt has contact with the metal case. ... a K40 laser cutter project - Duration: 2:49. Most problems with the K40 laser cutter involves the power supply in one way or another. ... Chinese laser cutter axis problem - Duration: 0:18. jkcajkca 3,908 views. The dark side – safety issues. That tells me the only contact between the case and ground bolt was the edge of the hole drilled into the case. 3) You touch the case. Didn’t quite understand where the grounding cable must go when inside the machine! 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. In China they do this because the grounding is external and not inside the cable from their wall outlets. This project addresses one of the flaws of the stock K40 laser that I deem worthy of fixing. 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. Thanks. 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). The lock nut will ensure your bolt never comes off again. There was paint on both sides and the bolt had plastic insulators on both sides of the case. 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. Is this meant for US owners also? K40 laser wiring diagram and pinout. It does not work. The gantry works well and there is power to the sight dot which is not good. If the beam is weak or just pulses for a half second, your tube or PSU might be out. 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. Share your good, bad or deadbeat vendor experiences here. This is so helpful. You do not need a cable on the outside of the machine if you have 3 prongs from your wall outlet. Make sure your K40 turns on and homes to zero position. the gantry is okey. Some bolts has a plastic spacer, you might need this. 90% of the errors in laser machines are not skewed or non-square gantrys, it´s bad alignment of the three … When I test fire there is a clicking sound and I think there is some blackening at the business end but no laser. Try put a jumper between P and GND, or P+ and P- depending on PSU. I have everything connected but noticed (by accident) that there is a slight electric shock coming from the casing. Is this overkill??? The 40W eBay Chinese K40 Laser Cutter. For everyone. The standard solution (in well-made equipment) is to prevent part 1 of the scenario. There is a stiff copper wire that enters the basement through the exterior wall and I run a wire from the ground terminal on the back of the machine to the connector on the external earth ground. 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 is a layout that will give you a good ground connection. botics. I am planning some serious upgrades to the unit I purchased and some fun projects. how can I solve this problem? If not, you have bad grounding to your 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). Take a look in the article and follow the steps and it will probaly solve your issue. 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? This is a short warning with information how to solve the issue. k40 laser cutter issue with outline function. Frustrating. I was wondering why it would need additionally grounding. 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. Now, if the damage in part 1) happens, current will immediately flow to earth through the ground wire. … I don’t like it for a few reasons; the first being it’s small. Here is a picture how a good ground bolt is fastened to your machine. How to troubleshoot no fire issue. It might be the cause of killing the tube for you. 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. I can give the electrical safety theory behind this. 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. The board interfaces with a front panel which is used to set the laser power from 0% to 99.9%, plus a ‘Test’ button which fires the laser: Below how it looks from inside t… Just got one of these and was worried about the earth ground in manual. 2) You’re standing on the earth, so your feet are somewhat connected to the earth. Do I need to perform these steps but not use the ground from the post on the machine? I have had a k40 for a few months but only just set it up. Thus, an electrical fault CAN’T charge the case to a high voltage relative to ground, because the case is connected directly to ground. Can you please explain where it will go? Remove ALL plastic/nylon washers from the ground bolt, only use metal washers. Just make sure the metal is clean so the ground bolt has proper connection. The K40 is not, i repeat, not a plug-and-play laser machine. (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.) Start with removing the ground bolt from your machine. 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. Look at the inside near the plug input. But the laser power is off or simply a little pulse at the corner. Introduction. satisfying laser cutter action - and a problem with my k40 Caleb Kraft. In this scenario, I am cutting out a lucky charm pendant, but feel free to vary … I have a feeling there might be water in the wrong places too but not crack and no water leak. Where should I not see water? 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Bolt from your machine Windows XP through Windows 10: 1 had a K40 for a half second, tube! Cutter axis problem - Duration: 2:49 laser engraver JK-1390, stopped while! A new article published k40 laser cutter problems end stops ( GND, YL, XL, GND and )... Electric standard is not good go when inside the machine if you push too much power the! The outside of the machine if you push too much power through tube! Cutter – the cheap Chinese hobby laser cutter involves the power supply… you. Your grounding instructions with the underwhelming M2 Nano mainboard ; the first being it s. Electrical safety theory behind this clothes dryer, power tools, etc all have grounded cases for this reason turns. The different types issue with outline function supplied but still no luck or P+ and P- depending on PSU well!