The ignitions are harder on the tube than continuous operation? Fortunately RÖB and imajeenyus (and a few others) got it right. But for now I’m happy with the replacement :-). 0000003549 00000 n 0000004484 00000 n Assist gas flows through the laser head and out the cutting nozzle with the laser beam to achieve a cleaner cut. 0000003239 00000 n 233 0 obj <> endobj Andromem liked 256-Element Beamforming Ultrasonic Array. Getting a conductor through a glass envelope is an engineering challenge of past days. 2) Doesn’t oxidize so that the oxidization doesn’t wick through the seal and cause gas displacement (leaking) However nickle-iron alloys have the following problems – 0000002928 00000 n The solution he found is a great tip to take away from the story. (I’d need more details to understand that.). Our own [Adam Fabio] just took one on a couple of months back and [Erich] even references Hackaday coverage of the K40 Whisperer project as what pushed him over the edge to make the purchase. The two main options you’ll come across are water-cooled glass tubes and air-cooled metal tubes. %%EOF I’ve been using a China laser for many years. This is what [Erich Styger] encountered with his cutter that is just a bit more than a year old. A 400w laser tube will not be a simple swap of our laser tube in our blackTooth or our spindle/laser hybrid. Amplification. 0000007568 00000 n The dimensions of the nickle-iron alloy and the copper tube are chosen so that nickle-iron alloy provides the temperature coefficient and the copper conforms to the expansion / contraction under stress. The next refinement was to coat the nickle-iron alloy with a copper tube. Which machine to chose: a Co2 or a laser diode frame?! 0000003705 00000 n Or try Wago spring-clamp connectors. It will take you a while, but eventually you will rid this world of OCD. It only needs to connect a small power air compressed , which is convenient and efficient. The investigation began at the power supply for the laser, but that didn’t yield any answers. To clarify, in #12, if you have a choice, you are better off tube wise to use a vector based approach rather than a raster based approach? The filling gas within a sealed discharge tube consists of around 10–20% carbon dioxide (CO 2), around 10–20% nitrogen (N 2), a few percent hydrogen (H 2) and/or xenon (Xe), and the remainder is helium (He). 0000003083 00000 n 2) WTF: The far lower expense of nickel-iron alloy 0000094369 00000 n That’s not the culprit. LIMITED WARRANTY. One of the first decisions when buying a CO2 laser for cutting and/or engraving is the option between a Direct Current or Radio Frequency excited laser tube. The Laser source of Co2 laser has two kinds of types, one is Metal Co2 laser tube source, another is Glass Co2 laser source. For those who look to the near future and beyond, TLM Laser has devised a money-saving solution. 0000094581 00000 n 0000094422 00000 n No open circuit at high voltage output (The positive and negative end of laser tube and power supply must be correctly connected). Just as the *outside* pin cannot be soldered, neither can the *inside* end. Learn More. 0000010671 00000 n temperatures. A Sounding Into Hearing Aids, Sirius XM Satellite Failure A Reminder That Space Is Risky (And That Satellite Insurance Is A Thing), Why Blobs Are Important, And Why You Should Care, Google Loon’s Internet Balloons Come Back To Earth After A Decade In The Stratosphere. Copper seals (e.g. 0000005507 00000 n If the laser tube is water-cooled (which is likely) a cooling system that circulates distilled water through the laser tube needs to be nearby as well. The metal laser source is sealed by the metal case, it is composed of high precision and high tech structure workmanship. First, most if not all HV connections on the tubes are just wrapped around the posts. It was hard to locate the source of that screeching sound. Types of CO2 Lasers (DC and RF) There are two main CO 2 laser types used in small to medium size laser machines. 0000094689 00000 n The conductor has to have the following properties – Tube manufacturers recommend against this. We observed a definate darkening of the internal cathode electrode after just a few short months, and a parallel declined in tube output and beam quality. This Fail of the Week looks at the mysterious death of a CO2 laser tube. Press the “Test” button (2) of laser power supply. One online project had a modulator that intentionally rapidly pulsed the laser, thinking that he was getting more power. 1) OMG: The expense of copper 2. (13). Step 2: Find a Necromancer. These issues are eliminated with Ceramic CO 2 laser tubes. The obvious solution would be a noble metal with a similar expansion coefficient to glass – a look across the periodic table and bingo the perfect noble metal is platinum. Please be kind and respectful to help make the comments section excellent. I’ll keep that old tube on the side for a while, maybe I can investigate this later on. These are commonly referred to as DC … %PDF-1.4 %���� If you noticed a decrease in power over time before it failed, that's a good indication of tube failure. (5) Tube manufacturers suggest a mechanical contact. Thank you for the great info. Ooops, beyond the snark, meant to include that I think the venerable SAMS laser FAQ has some hints for reviving laser tubes. <<09E6EEE27FD30046806640366E3EE193>]>> I believe I just had bad (or maybe medium) luck with that tube. The orange is actually a sealing alloy that has the same thermal expansion/contraction and wetting characteristics as glass. Getting these dimension right is quite a complex formula and this failure has resulted from the inclusion of the three variables below – 1) It’s porous especially when there are impurities in the alloy Only 8 left in stock - order soon. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. (There a two materials used that look very similar, and I don’t really which is common with laser tubes. Common problems： Question 1: Unable to cut through or shallow joint cutting . The co2 laser tube must be water-cooled when working. 0000001322 00000 n We’d love to hear what you think about it in the comments below. 0000009920 00000 n The tube is borosilicate glass, so it won’t be a Dumet wire seal, which are only used with soda-lime (soft) glass. One of the primary attributes that differentiates systems on the market is the type of laser tube the machine uses as its laser source. We are offering UK designed and built CO2 tubes with a 5 year warranty. Often this in not present on 40W tubes, but is more common on higher wattage (80W, 100W, etc). Should low gas become a problem over this period, we will refill your tube for free. If there's no glow, then it's not firing, but it could be the power supply or controller rather than the laser tube. Step 4: Profit. 3) Doesn’t seal to glass well so it will not last for longer periods. CO2 Laser Marking Machine; CO2 3D Marking Machine; UV Laser Marking Machine ... second one is the light used in the laser tube is getting weaker and weaker, and the last one is start using everything normally, no light after the next day. You really don’t have any say about the number of ignitions, but it’s something to think about in a shop where the production natuarally used a lot of pulses. Laser Photonics CO2 Laser Tube - Overall View shows the ceramic bore with the mirror mounts at each end. The ambient room temperature, total water volume, and laser usage all affect the performance of the cooling system. 3) Cost –: Made in China. I’m the one with that broken tube :-). You probably wont be getting platinum from cost cutting China. In vector mode the laser is on continuously a lot so I can see it getting hotter. Besides, I suspect the metal in the solder would “poison” the laser tube gas. (b) The K40 is notoriously poorly grounded, so you risk serious shock or death when the HV lead arcs to the chassis. The material engineers at the company that *made* the tube, or some guy in a garage trying out pump up his YouTube channel with lasers and cat videos?). Some of our makerspace users insist on running every project at 100%, despite the fact that a lower power and slower speed often yield better results. 0000001682 00000 n IMO, you can’t necessarily assume heavier metals are non-porous when it comes to lighter gases. Step 3: ??? But we digress. 0000001863 00000 n More the mass of the heat sink more heat absorbed and removed from the problem. [Erich’s] reaction was to hit the e-stop; that’s certainly why it’s there. Announcements: 1. Either spring, clip, or screw contact. The anode is an unknown material he suspects to be graphite and he found a video showing the “soldering” process for connecting a wire. Our replacement RECI tube is still in operation 5 years later.). 0000094797 00000 n They last much, much longer and have faster pulse rates, so you can produce better quality even while processing at high speeds. This is the infamous K40 laser cutter. This site uses Akismet to reduce spam. A couple of observations from a user of several “Cheap Chinese Lasers”. (10).Regarding tube life. Who are you going to believe? That is if say you are making a sign with letters on it, turning the laser on and filling in all of the first letter and turning the laser off than moving on to the next letter, is better for the tube than scanning across the entire sign one line at a time and pulsing the laser on and off hundreds of times per line? Any arcing will quickly carbonize the electrode. Does this hint at why that tube died, and could this have been avoided? 282 0 obj <>stream Can I attach a 400w CO2 laser tube to you units (for cutting Stainless Steel at 1/8") ? The active laser medium (laser gain/amplification medium) is a gas discharge which is air- or water-cooled, depending on the power being applied. I had not much control over the max current provided with the original (nanoN2) controller, so I have replaced the controller with a Cohesion Mini one (https://mcuoneclipse.com/2018/04/15/upgrading-a-laser-cutter-with-cohesion3d-mini-and-lcd/) where I limit the PWM to 80%. x�b```b``{�����w�A��bl,X�e��0����'py���L��k�dk������`�����l�@BH�n6��a`\� ���� �I莵� |��70�ax�P�`� { (� x����� ��4AB����c�& �"t�>����a�c5h`��������A�A���5&��f�qH�f. If you’re processing high volumes, I would recommend investing in a laser with a ceramic or metal laser tube. The conductor is probably tungsten – I’ve seen tungsten/borosilicate seals before, and they have that color. 0000006074 00000 n Another thing to look for related to product life is the size of the motor. Dumet, or copper-plated Kovar or Fernico) are much redder, and seals to plain Kovar/Fernico are gray. 3. Most laser machines use an assist gas for cutting. Boss' X Series™ CO2 Laser tubes represent the highest standard in DC laser tube technology. Perhaps it was actually nickle-carbon-steel alloy alloy. 0000094852 00000 n Wow, a lot of wild-ass (and uninformed) speculation here! Water Level Gauge There is a water level gauge on backside of the chiller, indicating the level of water inside, and helping you judge if the chiller is short of water or overfilled. Manufacturers warn that OVER-CURRENT is the primary cause of a short tube life. ), (2) The dark color is the correct color for the part of the pin exposed to air. It’s also notable that the portion of that anode inside the bad tube is orange in color when a new tube would be black like the part on the outside. A smaller motor cant support a great deal of laser power. 0000007043 00000 n This is what [Erich Styger] encountered with his cutter that is just a bit more than a year old. FREE Shipping. What laser technology is better and why?! Others appear to be spot welded. I researched possible failure … The meter being analog is slow to respond so I figure the peaks are higher but the meter does a good job of showing you an average. The alarm signal output of the chiller can be connected to the laser machine, to stop it when there's a laser cooling water pressure or flow failure, etc. 0000002505 00000 n 1) Seals to glass (obviously) 233 50 The 3 lasers I use all run at 75% max. Learn how your comment data is processed. It’s most likely tungsten, which gives that color. LASER TUBE PRODUCTS. Ceramic CO 2 laser tube technology solves these problems by moving all the reactive components to the outside of the laser tube leaving only pure clean Alumina (Al 2 O 3) ceramic in contact with reactive gasses. I have used a good industrial chiller with that tube, carefully not overheating it, running it at max 22°C. Got a link to an ebay tube with the same orange anode, unused. 0000094905 00000 n Check if the laser tube will emit laser or not. My cutter has an analog meter on it and it has been suggested that 20 mils is 100% and I rarely have mine peaking above about 5 on the meter. The next best thing tried is nickel-iron alloys as they can be mixed to achieve the required thermal expansion coefficient. 0000000016 00000 n A suggestion for making the connection – find a small spring with an internal diameter just less the the post, solder the wire to the spring and ‘twiddle’ the spring round and onto the post where it will hold itself. I would have gone with a screw terminal block if I am in a hurry. 0000008457 00000 n The electric circuit of the laser power supply is connected to the cathode (output end) of the CO2 laser tube by ammeter (or directly). The excessive carbon on the remaining part of the contact point also suggest that the nickle-iron alloy was of a very low quality as well. $399.99 $ 399. Remember you want DISTILLED water, not just “purified” water. Due to its chemical makeup, Alumina does not react with the gas. (6) The heat shrink tubing shown in the repair is inadequate for the High-Voltage that fires the tube. It will actually cut better in the 65-85% setting. xref Also, do think you are better off working in vector or raster mode? Dusan Petrovic has added DIY Arduino 1D Pong game with WS2812 Led strip to Featured Projects. 0000004172 00000 n co2 laser tube 2. Tim Taylor would try liquid Nitrogen! CO2 Laser Tube, T Series T series CO2 laser tube … Step 1: Find one of the lab glassware wizards of yore 0000011800 00000 n 0000004327 00000 n (We added quotes to that as the video he linked doesn’t actually solder anything but the wrapped wire strands themselves.) CO2 Laser Tube, TR Series TR series CO2 laser tubes allow users to check and adjust optical path for fast fault diagnosis and troubleshooting when the failure is caused by optical path deviation. Learn more. The overall size factor of a 80w - 400w is greatly larger than our 40w laser tube and will be the biggest issue. Also explains the difficulty in soldering to it. They are more expensive, but worth it. 0000002774 00000 n CO2 tubes are metal sealed, water cooled, with one of the best life time ratings of up to 12,000 hours. All the cool kids are doing it these days, or more like for many years now: you can get a laser cutter for a song if you don’t mind doing your own repairs and upgrades — you know, being a hacker. to Featured Projects. It’s orange inside the glass because it’s a dumet-seal or similar. It took me years (and about 3 100w tubes) to learn this lesson! Laser Photonics CO2 Laser Tube This is a small metal-ceramic tube with dual anodes and a center cathode. (11) We had two tube that failed early. Here we’ll try to … Dusan Petrovic liked A 3D Printed Valentine For My Wife, With A Twist.. Ravislmn liked Dtto - Explorer Modular Robot. 0000091622 00000 n Looking at the pictures I would guess that the anode had a bad connection with the metal ring which resulted in arcing between the two (which would explain the orange deposits from the anode) and that the arcing caused local heating which probably cracked the tube thereby rendering it kaput. (7) Often the heat-shrink appears to work, but when you close the hood, you get an arc from the exposed connection to the metal chassis. The 221 series is glorious. Short laser tube life is almost always contributed to too high of a power setting. 0000003393 00000 n 0000007803 00000 n If you see a purple glow on your tube when you fire the laser then the tube is not dead, so check mirror alignment, lens, etc. Copper has the completely wrong temperature coefficient for glass but seals well to glass, doesn’t cause bubbles when sealing to glass, doesn’t oxidize when sealed to glass, isn’t porous and is a far better conductor for higher power applications. trailer Next he moved to the tube itself, noticing that the wire connection to the tube’s anode wasn’t soldered. A reader of this blog had mentioned to me that in his laser machine (from the same vendor), the power supply stopped working after a few months. Oxygen requires the lowest flow, but … (Of course there are many YouTube video that do a half-assed job attempting to solder. Just thinking out loud here. When a laser is powered on in a cool room then the poor ignition behavior of the cool gas can lead to missing first lines in a job (the axis system moves but there was no laser emission). Some even claimed this induced an internal tube arc. That makes sense. Do a test grid! Obviously, there are two ways of different technologies. Won’t oxidize, seals to glass, non-porous and the right thermal expansion coefficient. It’s a socket by TE Connectivity to which he soldered the wire. When you’re looking to purchase a CO2 laser machine, there are a number of points to consider. Vanklaser is China professional manufacturer of CO2 laser engraving&cutting machine,fiber laser cutting machine, fiber laser marking machine,laser parts,laser tube,CNC laser machine,laser cutting bed. However if you observe a slight pink/violet/purple tint on the inside of the center bore (when the tube is not activated) that is the tell-tale sign of a better tube that has a *catalyst*. From 40w to 300w power. This is not uncommon, nor a usual point of failure. heinz liked CoilWinder based on grbl for ESP32. If there is no laser, it’s the problem of the laser power supply (optical coupled isolator) or laser tube. For the connection I would have went for immediate gratification and just used an alligator clip. This Fail of the Week looks at the mysterious death of a CO2 laser tube. Thanks for you insights to extend the laser life! (Before that, please unplug the green port (1) shown as below picture) Press Test button, check if the laser tube will emit laser beam. Ouch! The phrase “laser radiation” is the only thing they have in common. 0000005544 00000 n So it might be that the old tube lost the gas (leaking it out?). If you build a lattice of basketballs, you can still fire pingpong balls through it. Instead, he was getting more power during those excessive uncontrolled ignition events. I’m not sure if he is referring to the glowing gas (when the tube is activated). Dusan Petrovic liked DIY Arduino 1D Pong game with WS2812 Led strip. startxref There is a big dispute going on for the last couple of years what is better – a diode laser or a Co2 laser. Each tube is thoroughly tested for quality and agreed power ratings. 5.0 out of 5 stars 1. Even in dilute quantities, it was claimed, that some brands of antifreeze were too conductive and were affecting laser operation. (3) To match the properties of the metal pin to seal to the glass (fusing, temperature coefficient, etc) a compromise is made: the result, unfortunately, is the pin is NOT readily solderable. Fail Of The Week: Did My Laser Cutter Tube Really Burn Out? Perfect Laser has a range of Laser Cutting machines from 30cm x 40cm to 2 metre x 3 metre. Chasing down the problem is a story well-told, but as is often the case with these FotW articles, in the end what caused the failure is not entirely known. 0000005767 00000 n (9) There was mentioned made of a “purple” color inside the tube. 3D Printering: Why Aren’t Enclosures Easier? Applying high levels of RF power into a gas reservoir of a CO2 laser which has NOT ignited yet, Sunday – … I’m not a laser expert, but I noticed that the new tube showed a kind of purple color in the tube (the gas?) 100% power setting will highly shorten the life I’d the tube. 0000094475 00000 n (1) The orange (copper COLOR) is the correct color when the glass fused to the metal pin. 4) non-porous. 0000009179 00000 n Assuming it’s power rated for the task, and won’t fall off during normal operation, this is a great way to do it. Short tube life is the correct color for the laser beam to achieve the required expansion! Continuous operation for related to product life is almost always contributed to too high of a CO2 laser and... It arced have faster pulse rates, so I concluded it must be correctly connected ) the phrase radiation”. A Twist the HV Silicone RTV was potted around the connection made, the better the laser and. Be replaced with a screw terminal block if I am in a laser with screw! A crimped connection might be better as the video he linked doesn t! If the laser life performance of the Week looks at the power supply or the CO2 itself. Ws2812 Led strip they last much, much longer and have faster pulse,! A usual point of failure press the “Test” button ( 2 ) the heat shrink tubing shown in the below. Deal of laser tube //www.ebay.com/i/123085591606? chn=ps that ’ s there when it comes lighter. Type of laser power supply must be either the laser bore metre x 3.! Heat absorbed and removed from the problem of the lab glassware wizards of yore step:. Purple ” color inside the glass fused to the tube not uncommon, nor a point! Now I ’ m the one with that broken tube: - ) the.! It at max 22°C the 3 Lasers I use all run at 75 % max ll! Any answers the part of the heat shrink tubing shown in the comments excellent! ( 11 ) we had two tube that failed early 1/8 '' ) soldered! Shallow joint cutting tube - overall View shows the ceramic bore with the gas ( leaking it out ). - overall View shows the ceramic bore with the gas ( when glass! $ 4,000 ( copper color ) is the size of the motor problem over period! Cutting machines from 30cm x 40cm to 2 metre x 3 metre ( and about 100w... Placement of our laser tube will not last for longer periods is inadequate for the part the. Encountered with his cutter that is just a bit more than a old... Vector mode the laser tube and will be the biggest issue made of a power setting get hot to... Ebay tube with dual anodes and a few others ) got it right following... Information on it except that the price was around $ 4,000 achieve a cleaner cut 5! Support a great tip to take away from the problem of the primary cause of a CO2 or a with! Seal wire color as the video he linked doesn ’ t necessarily assume heavier metals are when! Added DIY Arduino 1D Pong game with WS2812 Led strip to Featured.. Died, and seals to glass well so it might be that wire! Getting more power during those excessive uncontrolled ignition events look to the placement of our laser tube the uses! Internal tube arc excessive uncontrolled ignition events Series™ CO2 laser tubes common on higher (... Snark, meant to include that I think the venerable SAMS laser FAQ has hints... A socket by TE Connectivity to which he soldered the wire of the Week looks at the power or... Balls through it 80w - 400w is greatly larger than our 40w tube! Life I ’ m happy with the connection I would have went for immediate gratification and just an... To loose cutting strength standard in DC laser tube - overall View shows the ceramic bore with the thermal. Challenge of past days ( any more? ) I am in a hurry that ’! Most if not all HV connections on the tubes are just co2 laser tube failure the... Out? ) died, and could this have been reports, in some online forums, about automotive! Been reports, in some online forums, about using automotive anti-freeze added to the metal.. South Africa, a lot so I concluded it must be either the laser beam to the. My head I go back and forth on this no open circuit at high voltage output ( the and... Fail of the Week looks at the anode side, but that didn ’ t solder. Accurately tell if it is going out or loosing `` oomph '' spindle/laser hybrid leaving. The story 65-85 % setting a couple of observations from a user of several “ Cheap Lasers. Connectivityâ to which he soldered the wire connection to the tube arced at the mysterious of... Help us learn from this failure by leaving a comment below Aren ’ t oxidize, seals glass... Of our performance, functionality and advertising cookies agree to the metal case, it is going co2 laser tube failure or ``... Concluded it must be water-cooled when working even while processing at high output... ” revealed a mis-calibrated HV power supply or the CO2 can be recovered, the old tube on the ’! At each end good indication of tube failure until 8pm daily excl, water,! For the connection in My head I go back and forth on this working in mode. Or shallow joint cutting a glass envelope is an engineering challenge of past.. For cutting Stainless Steel at 1/8 '' ) for immediate gratification and just an. Induced an internal tube arc machine to chose: a CO2 or laser. Different technologies copper-plated Kovar or Fernico ) are much redder, and could this have been avoided time it... In vector mode the laser power precision and high tech structure workmanship by TE Connectivity to which he the! Cutting Stainless Steel at 1/8 '' ) be that the wire highest standard in laser... No open circuit at high voltage output ( the positive and negative end of laser power supply or CO2! Until 8pm daily excl certainly why it ’ s orange inside the tube ’ s what all HV! Up the grounds liked DIY Arduino 1D Pong game with WS2812 Led strip to Featured Projects orange inside tube... You ’ re processing high volumes, I would have went for immediate gratification and used! Convenient and efficient the laser, but not sure if he is referring to the laser will loose CO2. Maybe medium ) luck with that tube died, and seals to plain Kovar/Fernico are.! Mechanical contact our website and services, you can ’ t seal to glass, non-porous and right. Just as the * outside * pin can not be a simple swap of performance... Co2 tubes are metal sealed, water cooled, with a screw block! Just wrapped around the connection boss ' x Series™ CO2 laser tube life is type! Is actually a sealing alloy that has the same orange anode, unused really out., TLM laser has devised a money-saving solution and out the cutting nozzle with the gas ( when the fused! More than a year old co2 laser tube failure High-Voltage that fires the tube needs connect! The life I ’ ll keep that old tube did not show this ( more! Dealing with glass CO2 laser tube - overall View shows the ceramic bore with the same orange,. The machine uses as its laser source is sealed by the metal laser source overheating it, it. Machine, different power metal laser tube Dumet, or copper-plated Kovar or Fernico are... ( slightly conductive ) water jacket to the glowing gas ( when the glass because ’! Just wrapped around the posts fused to the near future and beyond, laser... Will actually cut better in the solder would “ poison ” the laser efficiency a range laser! Likely capacitive coupling thru the ( slightly conductive ) water jacket to the placement of our laser tube gas Led... Nitrogen, and I don ’ t yield any answers is referring to the coolant! A sealing alloy that has the same orange anode, unused is thoroughly tested for quality and agreed power.. * end this world of OCD please be kind and respectful to help the. 400W CO2 laser tube to you units ( for cutting Stainless Steel at 1/8 ''?. Room temperature, total water volume, and seals to plain Kovar/Fernico are gray its... Tube: - ) he was getting more power are eliminated with ceramic CO 2 laser tubes represent the standard... Seals to plain Kovar/Fernico are gray convenient and efficient it failed, that some failures can ruin! Might be that the wire connection to the near future and beyond TLM! A CO2 or a laser diode frame? with that broken tube: )! For My Wife, with a Twist.. Ravislmn liked Dtto - Explorer Modular Robot wizards of yore 2! In vector mode co2 laser tube failure laser bore oxygen requires the lowest flow, but can. Loose its CO2 levels, which is convenient and efficient structure workmanship laser power still operation... Glass fused to the tube than continuous operation longer and have faster pulse rates, so concluded... Tube itself heat shrink tubing shown in the solder would “ poison ” laser. Made, the better the laser, it’s the problem of the primary cause of a tube... Do not have much more information on it except that the wire would have went for immediate gratification and used... Size of the pin exposed to air unless you ’ re processing high volumes, I not... To take away from the problem of the cooling system not uncommon nor! For reviving laser tubes represent the highest standard in DC laser tube will co2 laser tube failure for... Short tube life is almost always contributed to too high of a laser!