Homemade CO2 Laser Tube Part 2
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- เผยแพร่เมื่อ 21 พ.ค. 2021
- Other(better) resources:
Jarrod's laser world:
jarrodkinsey.org/
/ @magx1
Sam's laser FAQ:
www.repairfaq.org/sam/lasercc...
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Outro music by a friend of mine, check him out:
/ badamericansofficial
intro music:
bensound.com - แนวปฏิบัติและการใช้ชีวิต
I've been a "Laserist" doing Light Shows for decades. So I just have to say, God I hope you are wearing those safety glasses whenever you have plasma in the tube. The flair (reflections), which you cannot see in UV or IR WILL blind you. Please be safe.
Doesn't the glass stop most the U.V.?
@@helpabrothawithasubisaiah5316 It's a laser. It's amplified and calumniated ... so ... NO!
a reminder that the 10.6um wavelength will in no shape or form be able to go through the lens of ones eye, unlike NIR lasers. Sure, if the power is enough to actually cook flesh it will do damage, but it would be fixable and also it would hurt before it starts doing damage.
@@AKAtheA seriously in this context this statement needs verifying. I'm not saying it's not true, I'm just saying we need references confirming it when so much is at stake.
He showed some proper safety glasses (they didn’t look like cheap eBay glasses) in the first video. Guy seems pretty smart and isn’t missing any fingers from machining.
Great job. I gotta say, I chuckled when I heard you say "clean optics" while the mirror was in *your* hands. Not throwin' shade just loving your videos.
hahaha still wait for my "dirtiest hands on TH-cam" trophy
Grea-he-heasy.
7:10 "...and making sure the mirror's clean." points at the dirtiest mirror I have ever laid my eyes on.
the simple fact that you made a freaking CO2 laser from scratch so sloppy and works shows the freaking genius you are!
100%
25 years ago ,I and one partner of the university burn wood acrilic and other with a CO2 laser and congratulations for your project I really understand the filing when a proyect functioning !!! Great congratulations !!!
Very impressive,I really liked the laser alignment,its great to learn something new.
Thank you for sharing.
Good job completing the task inspite of all the setbacks and thank you for your honesty in showing that mistakes happen nobody's perfect, i would rather have that, that way i know what to expect and it encourages me to build my own don't change.
I just saw the first one, saw this, saw the ave shirt, instant sub. Keep it up man!
first off I recognize that t-shirt and I appreciate you wearing it
and now that I've finished watching: absolute legend. I want to make a laser CNC to cut through inch thick steel, and while I don't have the resources just yet, this does give me great inspiration. Thank you for this, great work, and looking forward to the next video!
we had one in our workshop (cutting steel up to 25mm), it had about 60kW power drain and high voltage power source for laser was 50kW strong, then ... good luck (cooling system was as large as american fridge)
Man your very knowledgeable person love your videos can't wait for the cnc laser build
+1 for the AvE tshirt!
What can I say, the man has excellent merch!
Where’s the cockford Ollie coffee mug
Excelent work, and my respect for you acknoledge over lacers.
love the videos and format XD keep it up, great channel :3
This was great to accidently stumble upon and it looks like you're having success, nice work! The usual gas suppliers used to be able to provide 'Co2 laser mix' in cylinders at a reasonable rate when I was messing with these. Distilled water will eventually pick up metal ions off the electrodes and fittings. I used a simple deionizing loop to keep the water non-conductive. If I remember right it was just a mixed bed DI filter in a standard filter housing while passing a small percentage of the recirculation through the filter. Some even have pipe threads right on them so you don't need a housing and after a few hours of initial recirculation you get truly electrically insulative water. Good luck with your project, looking forward to hopefully seeing more.
The best option is to abandon the design where deionization water is needed. There will be a thermal load on the tube, but this is solvable.
Makes me appreciate the amount of effort that went into developing directed energy weapons based on laser, maser, rail guns & similar post-bullet technologies with far high velocity of the energy delivery mechanism
Dude! That was freakinj' Awesome! You definitely have the Coickford Ollie. I wish I had seen this right when you made it. I worked for an optics company then and I could have made us lenses. That's OK, I'm looking for a job right now and making the lenses we'd need would be a breeze. I'm for sure gonna make one of these so I might hit you up for tips if I get stuck...Thanks man!!!
I'm impressed! I used to read Sams laser guide as a kid and felt like I'd never get to build a working CO2 laser myself. Did the helium tank have a little bit of oxygen in it though? Sometimes balloon grade helium has O2 in it to keep people from suffocating when they breathe it. I really like your design but I do wonder if the mirrors will settle out of alignment over time or use, but I'm still totally impressed even if it does need re-alignment fairly often, I might even copy your design! I have a couple YAG lasers myself and I had to re-align the mirrors which is definitely an art in itself and really fun for some reason.
i love this concept of diy co2 lasers, there like rebuild-able lasers you could feasibly use in a SHTF fabrication situation.
Boil known amount of water and measure time and temperature difference. You will know the power, more or less.
genius man
@ivan schafeldt just measure ambient temp and account for it
That would be making a calorimeter style laser power measurement device. Just make sure to insulate the water first.
@ivan schafeldt good point. Sorry for very late answer. Why comments on yt are so broken? First isolate, second if you put less water it will heat up faster. If you design a bit more sophisticated setup. Like a cuvette isolated with thermometer inside and outside with known insulation, and known dimensions, you could approximate this with Fourier law of heat conduction.
Edit: just got idea now. You could get very very small solar vacuum tube used to heat water by sun. They would be perfect for this experiment. Just need to find small one or fill it partially with water and add thermometer and good isolation cap and you are ready to go.
Edit 2: only if glass they are made of doesn't absorb too much light of CO2 laser, because you could burn little hole in it and loose the vacuum inside... Maybe just diy something similar with proper optical window for that wavelength.
I used to operate a laser cnc. The tube was about 10 ' long as I recall. My boss stuck his finger under the beam and turned it on. He pulled his hand back and it cut a clean slot. didn't hurt for a few days as the nerves came back to life. take care!
I am no expert either (Electronic Engineer) but from what i know of this subject, use plastic NYLON hose barbs so there is not as much discharge on the fittings. Alignment of the mirrors is absolutely crucial to max power output. Good job building this, keep experimenting for better power output. Try a couple of microwave transformers in series for a power supply but be ready for the high heat to deal with.👍
Man... Your video is really cool, funny and honest. Thumbs up and subscribe 👍
Congratulations 👏. I can imagine how euphoric you were when it actually worked.
This has some real Cody's Lab vibes, great work!
He's like Cody except he knows how to have a good time.
First video of yours I'm seeing. My first thoughts: lazers? Dope. *clicks video. Damn this dude got some MAN hands. This should be a good channel
you could always go with some sort of calorimetry setup with a a stop watch to measure the wattage of the laser, you might have to use something other than water for the medium, but basically anything that wont decompose or change state under the temps, and that you know the specific energy of will work the smaller you can get the sample of what ever you use the more accurate the reading will be, and you will likely only need a few second pulse.
This is insane, your animation game and CGI is slowly but surely tripling every video now
thanks bro
@@cranktowncity where did you get your mirrors? We have a 1064nm neodymium doped yag laser crystal and a 1.2kw microwave pumped sulfur lamp, just need the right mirror set for IR.
@@unitedspacepirates9075 I mostly just found them on ebay. Just gotta keep hunting til the right one pops up!
@@unitedspacepirates9075 Check out Edmund Optics, they sell anything you could imagine at good prices and they sell to hobbyists too, no minimum order quantities. I've been buying from them for years, they can't be beaten.
Trust me, you're a genius, a great genius.
excelente vídeo!
Ele mostra umildade,simplicidade e inteligência!
Sou fascinado por lasers...
Parabéns Amigo!
🙏🙏🙏👏👏👏🤝
Cool project love the T-shirt 😄
Oh yes this guy is fun,,, my new best stuff to watch at 4:30am....😊😊😊
Excellent choice in shirts!
hi, thanks for sharing this great project, what is the software you made the setup simulation in ( first minutes of the video)? thanks
Judging by the burn in over the point size of laser output, it looks like a possible 40 or 50 Watt output at a rough guess. That's quite a beast at that.
I'd guess 1-5W.
@@hubbsllc Having worked on hundreds of co2 laser tubes I would say maybe 10 Watts at a push. The Acrylic melt looked spotty so his alignment was prob way out plus his mirror was not clean. Really awesome he managed to get anything out of it so massive success! Our gas mix alone costs a couple of grand let alone the vacuum and testing gear which is worth tens of thousands!
@@Lewjoable Xenon is ultra expensive. Component of said mix?
@@flaplaya maybe it is a reason why Xe is not in that mix. CO2 (soda bubles), N (about 80% of air all aroun) and He "for"baloons" and all that mix is at partial pressure .
@@hubbsllc Looks you do not know much about lasers. It is not less than 40. May be 60.
Perfect videos! I love whenever i find someone as silly as me!
We used to use fax paper for coarse adjust. Long before you got close the paper would start going black, and when it caught fire we knew we were close. Then we used foam (I know, the fumes are toxic) and we could eventually get a perfect cone - the sure sign of a Gaussian distribution.
achievement unlocked. You are now a Badass.
Great work brotha!!!
love your scratch build style, thats how I roll too.
do you have an intended use for this laser? where will you go from here?
For easier adjustment of the mirrors, make some "differential screws".
Using plexiglas, you ca tweet the beam quality, roundness and single bell curve...
Building a shutter would be useful too...
Wow, amazing, never thought DIY CO2 laser was possible. 😯
Great job man!
a couple things that will effect performance of your laser. Your ratio to C02, Nitrogen, and Helium (Yes all three gasses are required for a C02 laser to gain energy), and how well your cooling jacket cools.
A larger OD on your inner tube (that you're doing work in) increases the distance your Helium needs to travel before reaching the water jacket in order to dump its energy.
C02 charges Nitrogen which charges Helium which gets cooled back down the jacket allowing the process to repeat while you're putting in work.
Congratulations dude
The length of the resonator ie the distance between mirrors must be a multiple of wavelengths for maximum output, so you have to adjust it to micrometer precision.
I’m surprised more people havent made these. My cousin designed one 20 years ago and this is the first one I’ve seen on TH-cam.
I think it had non parallel mirrors and one had a hole in it.
what on earth?? Now we can Diy laser??? unbelievable!! good work
congrats, that intro was hilarious!
Great job!
Thanks for sharing .
I love your videos!
For laser wattage I suggest to burn something that have high thermal conductivity, well insulate and known specific heat then log the temperature curve over time. The initial slope should represent wattage of laser. also we can compare with electrical power consumption to determine laser efficiency.
Wow awesome stuff. I can't believe you actually got this to work. Good stuff! Now if the output isn't enough to meet your needs, do you have any ability to increase the wattage?
It's kind of limited by the power density that can can be attained by the tube length and bore diameter. But it can be tuned by using different output couplers, different power supplies, etc until the optimum specs are met
yep, tube length is generally the rule, bore diameter has rather diminishing returns and after a few inches makes essentially 0 difference (from a paper I read a while back). you can see this in industrial units as they just have a bunch of tubes around some structural holder with the laser traveling through each one in series
I hope to see you succeed more on youtube sir
you‘ll need to flush the mirror and lens on the cutting part.
you‘ll need to suck away the smoke, it is super fine particulate and will harm you.
you may want to install a plate with inside channels and holes in the top that will keep the workpiece in place.
Let me be frank: effin great!
Amazing this idea
Yessss! Nice job!
Great work man!!!!
Thank you!
Wow man this is amazing , thnks for share.
Really like your project. Looks to be 40-60 Watts in my opinion. That is really great. I spent many years with lasers but mostly with sealed lasers, not gas flowing lasers. As I know you should use more efficient vacuum pomp and work some with gas mixture amount. Should be very little. Lasers work with very high underpressure. Regards
Another idea. Coupler 70/30% or even 80/20 could do better job, I think.
Straight up killing the game
good work
Rust removal tool. . Bet it will work amazing
Very cool project! Thanks for sharing. Just a question, where do you get the output couplers or partial reflectors? I usually get my lenses from AliExpress but can’t find the partial reflectors
you can find them used on ebay!
Thanks for watchin!
How to measure output energy hack-scheme: Take a well defined material with well measurable size that absorbs the lasers frequency,
"laser" it for some time, measure the temperature difference. The corresponding heat energy is the lasers output for the time the material got heated with the laser.
PS: The gas emitting the laser radiation when "pumped"/excited should also absorb it in the ground state, but you have to estimate absorption percentage for a second pipe filled with it. IIRC at least - I have not done stuff with lasers for over a decade.
Your cad models look beautiful, real life....
It should be possible to calibrate your peltier by using it sandwiched between a black anodized aluminium plate and a heatsink(use heatsink compound). Drill and tap a small hole in the anodised plate and use the hole to mount a TO-220 resistor with a thermal pad in between. Connect a variable power supply to the resistor and draw a graph of power into the resistor v voltage coming out of the peltier. Once calibrated remove the resistor and use the plate/peltier/heatsink assembly to measure your laser power, hopefully you will be somewhere in the ballpark.
What is the mode pattern of the beam? Is it a single spot or multiple spots?
Thank you for video.
Congrats!! I hope diy co2 becomes easier with time.
Wattage...no experience here but maybe heat black metal in an aquarium of water. Measure temp before and after. That'll give you a minimum wattage (some reflected).
@@TheRainHarvesterI may have to give that a shot!
AvE and William Osman? You just confirmed my subscription
That focussed beam looked pretty good, at least as good as my K40 😀
Sick! That's good enough for me haha
Cute laser-cooked hot dog rejecter. Cool laser tube, too.
Is TEM governed by power and the difference in mirror reflectivity? The closer the mirrors the greater the power -extra modulation, conjoined with power supply size = output power?
Where did you get the mirrors? The 60% one in particular?
At work I use a laser powermeter for this 😅 it is like a glorified photodiode which is calibrated and has a wavelength filter in front of it.
0:11
In the first moments of lighting the tube, the wood did not burn, how is that?
Hi because you said something about an eye I was wondering if you get a cow eye what would happen to the cow eye
Did you also upgrade the power supply?
What is the best gas ratio?
Funny guy! I have liked this video. Success for you with your channel!
Cant help my self from laughing when you said you cleaned the partial mirror while the edges was smeared with grease, but then you brought the lense out and you were wearing nitrile gloves to not smudge any oils on it xD
I've worked with a few CO2 industrial lasers, ranging from 50W to 5kW. From memory, they are 10% efficient. So if you know your voltage and current, work out watts, divide by 10. Nice project.
To measure to energy output get a small block of graphite and insert a scientific thermometer. Weigh the graphite block. Heat the block for 30 seconds (or some other known amount of time) with the laser beam and measure the temperature difference. Calculate the energy output based on the heat capacity of graphite 0.720 J/g degree centigrade
What an amazing guy you are. Thanks for sharing this with us normal mortals.
You're advertising others whom in your view are doing this better.
I am so so so inspired by your being just a dude like many of us but pursuing a high goal. You have made high tech science in your workshop. You have taught me and thousands of others what we can achieve by putting our minds into this.
We build solar concentrators. It took us 28 years to get to the final prototype. Working well and all that. Would like connecting with you.
Thanks for being you and doing what you did. Amazing.
David Svarrer
The peatier will be giving an output based on heat-flow across the device, not power applied to it. My suggestion would be maybe a copper plate, measure the change in resistance should indicate the instantaneous power. I think a four wire measurement might be required (assuming that it works at all).
For wattage wouldn't it just be easiest to shine it on a very dark matte black container filled with water (where the rest of the surface area is well insulated). And look at the final temp, then initial temp. Plug it into ∆Q=mc∆t
Get the amount of joules pumped into the system. Then just divide it by the time taken to get there. A similar method can be done but instead looking at the constant rate of increase, but there you need much more sensitive equipment.
Do you know how to fill the gas inside the video
Need to focus it down. Looks like about 1/4" output. With the right design, it could incorporate a variable slide to focus at different lengths. Wouldn't be too hard to "calibrate" and notch the slide so you had a reference. Otherwise very nice. This gives me confidence in casting my own aluminum for parts manufacturing. You're weird but cool. Like a real life, young Doc Brown.
Awesome man! 💪💪💪💪💪
Sick.
3:37 plz Try Sodium chloride crystal IR pass Filt and share the result .
And what about powering it with MOT ??
você é louco cara, gostei muito😀
I’m wondering if you could use a telescopic Cramer lens on the end of the laser to narrow the Dia of the beam of light ? You might need to install mirror on both ends of the lens ! One thing too keep in mind you may want to shoot it at a 2 inch block of steel just in case it does work . Oh yes love your projects... keep um coming..
2inch block? It will need a bit stronger power source (our old industrial CO2 laser machine could drain 60kW and High voltage power source itself had 50kW peak and it cut up to 25mm/1" at industrial speed)
Nice work man! The front-camera of an iphone sees infrared laser light as it lags an optical infrared filter.
Co2 lasers output is Long-wavelength infrared or 10600nm (10.6um) where as the ir your phone can see is Near-infrared which is 750nm-1400nm. In theory a thermal camera could see the output but I wouldn't advise pointing a multi-watt laser at an expensive thermal cam lol.
to people who said "get a HeNe laser to align it" : i aligned a HeNe laser with a red laser pointer back in uni lab. i followed pretty much exactly the same procedure as this guy. works just fine, costs around $1 even though its beam quality is obviously not great
Awesome video man. Your laser should be outputting close to 90 watts assuming 10% efficiency. 15kv X 60ma = 900 watts input and 10% efficiency, which is common, gives output of 90 watts.
But I believe that the distilled cooling water is conducting the high voltage partially. So the output power can be assumed half which is around 45 watts.
To get better output I think isolating the cooling jacket is better from the end electrodes.
Also CO2 laser premix gas bottles are easily available and cheap too. You can buy one as it would have the perfect mixture and give better output Power.
90 watts would be absolutely incredible, although i doubt it haha. 45 sounds much more realistic.
I'm gonna tinker around with non-conductive cooling methods, although I may end up having to isolate it.
Man, where do you live? because where i'm at not only are bottles of laser gas expensive, they make you rent a cylinder and open an account! I instead opted for the diy gas mixing route haha
thanks for the suggestions!
@@cranktowncity I live in INDIA, here they ask for a cylinder deposit if you're a continuous user or pay for the cylinder . Cylinder costs around INR 10000 Which is around 150USD . Gas cost is around INR2000 which around 30USD. You can take the cylinder and refill it at the gas supplier shop. GAS cost is lesser from local manufacturers and expensive from reputed ones like PRAXAIR.
Also you can buy a ZVS driver and a flyback transformer to build a powerful high voltage supply to power the laser.
Stay safe and hope you got vaccinated for covid.
Judging by the size of your tube and the burn, i am guessing 45 watt output. I am only going by experience i had tinkering with Asian made tubes. I'm glad that hotdog wasn't your finger
@Cranktown City look up dielectric fluid
Electro cool EC-100
thermal cameras are very sensitive to 10.6µm, even a little of the reflections can overwhelm them like looking straight into the sun.
What if we do it by pulses method
9:03 for pointer try Solar cell , Ldr .
Find out numbers by knowing the power of ir pumping laser and the efficiency of Second harmonic crystal Probably it would be Bbo or kdp .!!!!