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