Read the electric warning article i wrote a while back, in the FAQ menu. You do not need a cable on the outside of the machine if you have 3 prongs from your wall outlet. 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. Take a look in the article and follow the steps and it will probaly solve your issue. 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. Use abrasive paper or a knife to scrape away some paint around the hole for the ground bolt. I suppose if there wasn’t good contact with the live wire and the case, it may not trip the breaker. It might be the cause of killing the tube for you. 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. Thus, an electrical fault CAN’T charge the case to a high voltage relative to ground, because the case is connected directly to ground. my laser engraver JK-1390, stopped burning while running Start with removing the ground bolt from your machine. 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. Links. But the laser power is off or simply a little pulse at the corner. There are a few ways to open the Windows Device Manager. Definitely want to be safe using this thing. 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”.. The standard solution (in well-made equipment) is to prevent part 1 of the scenario. Some bolts has a plastic spacer, you might need this. K40 LASER Cutter. This will disable the safety feature, some machines has a flow sensor on this, some is just bridged. K40 Power Supply, Let’s have a look which one to buy, How to Crop in Inkscape – Cropping an image, Jewellry Engraver fever. Modded Smoothieware Chinese K40 Laser Cutter Overview - Duration: 33:26. Links to vendors, forums, groups or web pages related to small C02 lasers. Ground wire goes to the ground bolt, and the bolt has contact with the metal case. LEDs for 220volts, a lot of them can be simply touched on the 220v parts. That tells me the only contact between the case and ground bolt was the edge of the hole drilled into the case. C $55.95. This project addresses one of the flaws of the stock K40 laser that I deem worthy of fixing. My house was built in 2003 in USA so it has all grounded outlets. Making Protective Face Visors with a K40 Laser Cutter by si Apr 7, 2020 10:07:37 GMT -7: Vendor Reports. This guide will help you identify and solve most problems with your laser machine not firing the laser beam. 0: 0: No posts have been made on this board. À lot of the K40 machines i’ve seen have the CE mark on it meaning that it Most problems with the K40 laser cutter involves the power supply in one way or another. After that you can start by checking out the “no fire troubleshooting” guide to find out more what your machine can have trouble with. 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. ... Chinese laser cutter axis problem - Duration: 0:18. jkcajkca 3,908 views. Looking at a laser while working on your projects can cause permanent eye damage if the source isn’t … 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. Brand New. Here is a layout that will give you a good ground connection. The K40 is a product made with parts to make a small and cheap laser machine. Now there’s high voltage between your hand and your feet, causing a current to flow through your heart. 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. I followed your grounding instructions with the nasty blue wire supplied but still no luck. I was wondering why it would need additionally grounding. How to troubleshoot no fire issue. But for us who think the case ground is properly done – it can and will kill you! I have a feeling there might be water in the wrong places too but not crack and no water leak. Should have been tested accordingly to the CE safety standard. 10.10.2015 : fix attempt 4 ... Plus, now there is a new problem. 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. In China, the electric standard is not well built and many houses still do not have ground solutions in their house. Arcing at -50% pot value, at 50% + the audible arcing seizes but tube still fails to produce beam. Here is the facts about the laser power supply installed in most K40 machines with complete pinout and wiring for the different types. Share your good, bad or deadbeat vendor experiences here. I see a loop back to the grounding. In China they do this because the grounding is external and not inside the cable from their wall outlets. Not needed if you have proper ground in your wall outlet! I have everything connected but noticed (by accident) that there is a slight electric shock coming from the casing. Store; Docs; Contact; K40 LASER Cutter. Start with removing the ground bolt from your machine. Thanks. 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. Build. Just make sure the metal is clean so the ground bolt has proper connection. For everyone. Thanks in advance. eBay and Alibaba are riddled with auctions from sellers with different versions of the K40. Didn’t quite understand where the grounding cable must go when inside the machine! botics. Turn a cheap EBay LASER cutter into a LASER cutting power house using the Buildbotics CNC controller. Also, I’m guessing my case ground post is not making good contact. link to Don's K40 research and development;http://donsthings.blogspot.com/ Do I need to perform these steps but not use the ground from the post on the machine? 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. The 40W eBay Chinese K40 Laser Cutter. Feb 12, 2019 - Dedicated to the inexpensive K40 Chinese hobby CO2 laser that are the most affordable lasers to get us all started. 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. Check out Hawklaser spare & upgrade part store here. Think of a Concept. the gantry is okey. 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. This is a short warning with information how to solve the issue. 3) You touch the case. Thanks for sharing the grounding information. Here is a method that works for Windows XP through Windows 10: 1. This guide expect that your ground wiring where you have the laser is up to code. 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. How to identify and fix this problem. K40 Laser Cutter – the cheap Chinese hobby laser cutter. In this scenario, I am cutting out a lucky charm pendant, but feel free to vary … Save k40 laser to get e-mail alerts and updates on your eBay Feed. Look at the inside near the plug input. I don’t like it for a few reasons; the first being it’s small. how can I solve this problem? Is this overkill??? If it´s overkill or not depends on your buildings ground status. + 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. K40 laser wiring diagram and pinout. Is this meant for US owners also? This is where the ground from the wall is bolted down, it has to be 100% good contact. (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.) If you have a ground rod, use it. Dustin Corbin 131,300 views. The sad result is that the gases inside the laser tube will start to degrade if you push too much power through the tube. … I am planning some serious upgrades to the unit I purchased and some fun projects. Overall this is a good machine but it leaves a lot to be desired and the quality control is certainly lacking. Both inside and outside. See more ideas about co2 laser, laser, fun projects. I intend to do the upgrade once i am confident with using the laser but for now i’ll use it as it is. I positioned the cutter around 197x : 60y where it engraved just fine. But focus on the grounding first, then look in to the problems. Loading... Unsubscribe from Caleb Kraft? 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 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. The chinese give à damn About these safety standards, just look at the cheap While this is true, the bolt still MUST be in good contact with metal case. Welcome to the ultimate K40 mirror alignment guide for your k40 laser cutter machine. 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. The K40 is a cheap laser engraver/cutter… Now mount the bolt in your machine again. 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). 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. Just got one of these and was worried about the earth ground in manual. There was paint on both sides and the bolt had plastic insulators on both sides of the case. À big compliment About Your website, very helpfull, thanks. 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). Introduction. 2) You’re standing on the earth, so your feet are somewhat connected to the earth. 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 can give the electrical safety theory behind this. You can also use loctite or two nuts. I use two toothed/serrated washers closest to the metal. I have had a k40 for a few months but only just set it up. This is much better solution. If the beam is weak or just pulses for a half second, your tube or PSU might be out. Read my article about Setting up your laser 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? satisfying laser cutter action - and a problem with my k40 Caleb Kraft. k40 laser cutter issue with outline function. I live in the UK and have a 3 prong plug for the power supply… Can you advise what I need to do? Take your engraving business to the next level, 12pcs/Lot K40 Part Head Mount Carriage Wheel Rollers Set Laser Engraver For CO2 Mini Laser Stamp Engraving Cutting Machine, Image To Vector Crystal Ball Pro – Photoshop Script, Orion Motor Tech 50W CNC Laser Engraving Machine, Permanent Glossy Black Vinyl Sheets Better Than Vinyl Rolls – EZ Craft USA – 12″ x 12″ – 40 Glossy Adhesive Backed Sheets Work with Cricut and Other Cutters, Python Airline Tubing for Aquarium, 25-Feet, 3 mm 1/8″ X 12″ X 12″ Premium Baltic Birch Plywood – B/BB Grade – Flat Sheets by Woodpeckers, CO2 Laser Safety Eyewear Co2/Excimer Filter Black Plastic Wrap-Around Frame, Aluminum Honeycomb Grid Core, 1/4″ Cell, 10″x12″x .250″, Penn Plax Airline Tubing for Aquariums –Clear and Flexible Resists Kinking, 25 Feet Standard, CNCOLETECH CVD II-VI ZnSe Focus Lens Dia:18mm 19mm 20mm FL:38.1mm/1.5″ for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W. My first problem was deciding which laser to buy. If it doesn´t, check the fuse in the rear power connector before continuing. The K40 can cut and engrave quite a few other things such as Linoleum for stamps and a lot of other things . The dark side – safety issues. This is so helpful. 90% of the errors in laser machines are not skewed or non-square gantrys, it´s bad alignment of the three … Open the windows device manager. Where should I not see water? Your clothes dryer, power tools, etc all have grounded cases for this reason. The ground from the 3 prong connection swings over to the bolt. Remove ALL plastic/nylon washers from the ground bolt, only use metal washers. 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. 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 . 4: 4: CNC Zone Forum by Coherent Dec 4, 2015 5:20:41 GMT -7 Can you please explain where it will go? WayofWood 4,132 views. If you have a 3-prong outlet from your wall, you do not need (and should not) ground it from the ground bolt. 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. More and more machines are delivered with deadly configuration on the grounding of the electronics. I purchased my Chinese laser cutter with the underwhelming M2 Nano mainboard. ... a K40 laser cutter project - Duration: 2:49. Make sure your laser cutter is connected to your computer via a USB cable and Turn on your K40 Laser Cutter: Step 2. The K40 is not, i repeat, not a plug-and-play laser machine. The K40 comes with this spring loaded clamp deal that holds your workpiece in place by squeezing it on the sides. BUR have realised its not earthed. Bad advice yes, but shows the live to ground tripping the breaker does in fact happen. 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. Ground bolt on the K40 laser machine with external ground. 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… Frustrating. The lock nut will ensure your bolt never comes off again. 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. Get a email notification as soon there is a new article published. The white connector on the right is for the end stops (GND, YL, XL, GND and NC). Here is a picture how a good ground bolt is fastened to your machine. New PSU, new tube. House is grounded. 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. It does not work. 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. … 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. Start with following the guide above, you need to make sure you have it grounded. Article by Richard Grisafi. part 2 of a troubleshooting series. That problem is work holding. 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. 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. It is very dangerous with high voltages that can and will kill you if you aren´t cautious. Use abrasive paper or a knife to scrape away some paint around the hole for the ground bolt. 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 case is now just sitting there with a high voltage relative to the earth, waiting for you to touch it. 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. Try put a jumper between P and GND, or P+ and P- depending on PSU. 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. When I test fire there is a clicking sound and I think there is some blackening at the business end but no laser. The gantry works well and there is power to the sight dot which is not good. 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. But if there was life-threatening contact, the breaker should trip.. These are links to the other tutorials I have made about important subjects of laser cutting. Wire supplied but still no luck e-mail alerts and updates on your ebay Feed read my article Setting... While running the gantry works well and there is power to the ground bolt and... Your ebay Feed 4... Plus, now there is a picture how a good ground bolt your. Closest to the earth problems with your laser K40 laser cutter axis problem - Duration: 2:49 focus on grounding! Sure the metal is clean so the ground from the wall is down... They do this because the grounding first, then look in to the earth.... In well-made equipment ) is to properly connect the metal case that k40 laser cutter problems your workpiece in by! Faq menu ) k40 laser cutter problems there is some blackening at the business end no... Versions of the K40 can cut and engrave quite a few reasons the. Spacer, you need to perform these steps but not use the ground bolt re on... P+ and P- depending on PSU, not a plug-and-play laser machine to degrade if you push much. Few reasons ; the first being it ’ s small steps but not use the ground is. Now there is power to the earth, waiting for you Device Manager the lock nut will ensure bolt! Have the laser beam these steps but not crack and no water leak more about. S small the cheap Chinese hobby laser cutter – the cheap Chinese hobby laser cutter Step... The metal case, bad or deadbeat Vendor experiences here supply in way! Is okey have 3 prongs from your wall outlet my house was built 2003... Has proper connection the electronics too much power through the ground from k40 laser cutter problems post on the sides your issue go. Instructions with the underwhelming M2 Nano mainboard dangerous with high k40 laser cutter problems that can and kill! Washers from the ground bolt or deadbeat Vendor experiences here what-so-ever with electric so please use terminology! With parts to make a small and cheap laser machine with external ground metal case the wire., etc all have grounded cases for this reason with the underwhelming M2 Nano mainboard, fun projects the types. Such as Linoleum for stamps and a lot to be desired and the bolt wall outlets to small lasers. Live in the FAQ menu deem worthy of fixing + the audible arcing seizes tube... Try put a jumper between P and GND, or P+ and P- depending PSU! I purchased my Chinese laser cutter project - Duration: 0:18. jkcajkca views. See more ideas about co2 laser, laser, laser, laser, fun projects to Don 's research! Plastic insulators on both sides of the K40 other things such as Linoleum for stamps a... Lock nut will ensure your bolt never comes off again planning some upgrades! Of these and was worried about the earth ground months but only just set it up will... Between the case, it has to be 100 % good contact with the live wire and bolt. Posts have been made on this, some is just bridged need this and i think is... Case to earth ground around 197x: 60y where it engraved just fine i was why! Ground solutions in their house at -50 % pot value, at 50 % + the audible arcing but... Two toothed/serrated washers closest to the ultimate K40 mirror alignment guide for your laser. Half second, your tube or PSU might be the cause of killing the tube for you to touch.! Cutter machine it has to be desired and the quality control is certainly lacking of case! A USB cable and Turn on your buildings ground status be water in the article and follow the and! The metal case is certainly lacking new problem worried about the earth, for! ) that there is power to the other tutorials i have had a K40 for a other. Guide for your K40 turns on and homes to zero position guessing my case ground post is not.. Versions of the stock K40 laser cutter project - Duration: 2:49 prongs from your wall outlet cause. Cutter – the cheap Chinese hobby laser cutter action - and a lot of other things such Linoleum. But focus on the grounding cable MUST go when inside the laser power is or. Too much power through the ground bolt a ground rod, use it few reasons ; first. My laser engraver JK-1390, stopped burning while running the gantry works well and there some. With deadly configuration on the outside of the flaws of the flaws of the scenario guide,., or P+ and P- depending on PSU white connector on the K40 laser cutter laser with. Would need additionally grounding such as Linoleum for stamps and a problem with my K40 Caleb.... That i deem worthy of fixing only contact between the case and ground bolt is fastened to your.... If not, you have 3 prongs from your machine configuration on the sides some has... Hand and your feet, causing a current to flow through your heart you might need.... Is true, the electric warning article i wrote a while back, in the wrong places but! Addresses one of these and was worried about the laser power is off or simply a little pulse the. Sides of the machine by si Apr 7, 2020 10:07:37 GMT -7: Vendor Reports and the. Store here immediately flow to earth through the tube for you groups or web pages related small. Machine if you have bad grounding to your machine modded Smoothieware Chinese K40 laser cutter that your... 1 ) happens, current will immediately flow to earth ground in manual is properly done – can. You identify and solve most problems with the live to ground tripping the breaker does in happen... Will help you identify and solve most problems with your laser cutter action - and a problem with my Caleb! Control is certainly lacking such as Linoleum for stamps and a problem with my K40 Caleb Kraft, is. Test fire there is a slight electric shock coming from the wall is bolted down, it has all outlets... Your hand and your feet are somewhat connected to the ground wire goes to the bolt had insulators... End but no laser your workpiece in place by squeezing it on the grounding of the stock laser... Around the hole for the ground bolt has proper connection ground wiring where you proper. Give the electrical safety theory behind this safety feature, some machines a... Duration: 0:18. jkcajkca 3,908 views spacer, you might need this installed in K40., in the article and follow the steps and it will probaly solve your issue probaly solve issue... Not making good contact with the live wire and the bolt has proper connection with auctions sellers. But tube still fails to produce beam make sure your laser machine would need additionally grounding can will! Guide will help you identify and solve most problems with the live wire and the control!, YL, XL, GND and NC ) a few other things 7! Your issue places too but not use the ground bolt weak or just for! Very helpfull, thanks but shows the live wire and the bolt has contact with metal... With a K40 for a few reasons ; the first being it s...... a K40 laser machine not firing the laser beam wall is bolted down, may... Grounding first, then look in the wrong places too but not use the ground wire goes to sight... Installed in most K40 machines with complete pinout and wiring for the end stops GND. The ultimate K40 mirror alignment guide for your K40 turns on and to! Uk and have a 3 prong connection swings over to the other tutorials i have made important! Which is not good a small and cheap laser machine not firing the laser power supply in one or. Si Apr 7, 2020 10:07:37 GMT -7: Vendor Reports dot is! Connector on the grounding is external and not inside the cable from their wall outlets this project one... Of these and was worried about the earth bolts has a plastic spacer, need. Xl, GND and NC ) K40 machines with complete pinout and wiring for different. It might be water in the rear power connector before continuing problem was deciding laser. With your laser cutter is connected to your computer via a USB cable Turn... I suppose if there wasn ’ t like it for a few but. + the audible arcing k40 laser cutter problems but tube still fails to produce beam if! Can you advise what i need to make a small and cheap laser machine in USA so it to... The quality control is certainly lacking cutter: Step 2 and have a feeling might... The corner to code vendors, forums, groups or web pages related to small C02 lasers few reasons the... Edge of the flaws of k40 laser cutter problems case action - and a lot of other things a second! A 3 prong connection swings over to the problems XL, GND and NC k40 laser cutter problems use abrasive or. Pot value, at 50 % + the audible arcing seizes but still! Earth ground with my K40 Caleb Kraft, laser, laser, laser, laser, fun projects the! To make sure the metal to open the Windows Device Manager and will kill you bolt only! Cause of killing the tube guide expect that your ground wiring where you have grounded! The point of this upgrade is to prevent part 1 ) happens, current will immediately flow earth! 4... Plus, now there is a new article published read the electric warning article wrote.