The spiral glass tube in the bottom of the tube makes the gas return path longer than the bore, ensuring that the plasma wont ignite outside of the bore

@trustthewater

7 жыл бұрын

I just assumed the coil was part of the water cooling until this video. Thank you.

@Matt_Deluca

5 жыл бұрын

Also, the pinkish-colored deposit on the inside of the tube is probably a catalyst added by the manufacturer. I believe it helps stabilize the output, which would make sense for medical applications.

Nice find!

I have a similar unit, but uses fluorinert cooling as cooling circuit is "live". That big ring looks like camera mount.

@everythingquads

7 жыл бұрын

I have almost the same HeNe tube that I purchased from you from Ebay. 05-LHP-141-15 October 89, also 10 mW. Not very powerful by modern day standards, but a nice clean beam good for holography and interferometry.

please make more teardown like this we miss this kind of videos of you !! great job as allways!!

Lens sounds car alarm, interesting

Some of the CO2 is broken down into CO in the arc. I THINK the purpose of the glass spiral is to allow more time for recombination into CO2 (via interaction with a small amount of water vapor added to the gas fill). It may also double as a high resistance path, so the arc doesn't strike on the outside of the bore.

@userPrehistoricman

7 жыл бұрын

I was also thinking resistance/insulation

Just fascinating how much money and effort went into that machine, always cool to see fancy tech from the past!

Stoked to see another video - you're one of my favourite channels!

@Pillowcase

7 жыл бұрын

Also, this particular video is a really good one :) That articulating arm is awesome.

@zrobotics

7 жыл бұрын

Can you imagine how much it would cost to get that aligned, with all those joints? He's damn lucky it self-aligned, that seems like a project where you could chase your tail for 3 days trying to get it back into spec.

Awesome video! Can't wait to see what use you find for it.

Love the construction of the technology from this sort of time. No rounded corners, or blinding ugly blue LED's, no 'friendly' messages on a crappy touch-screen saying things like 'Whoops! Something wen't wrong!" Just professional, clean, and functional.

I wonder if the lack of screws on the external panels was so that it could be scrubbed down for a sterile environment without having to worry about germs hiding in the tiny crevices of a screw head. I don't know much about medical device technology but when dealing with something that you can't put in an autoclave, it seems like extra attention to detail is required.

@zrobotics

7 жыл бұрын

No experience operating as a tech in that environment, but from what I understand the preferred method is to encase the entire unit in sterile plastic. If you notice, there are some exposed screws in the laser housing. Plus, the small allen screws for mirror alignment would be impossible to clean, so I am sure that a specific disposable plastic cover was used for the arm, at the very least. I suppose the lack of screws was an industrial designer's idea, rather than for a specific engineering requirement.

Pink color observed on the internal surface of CO2 lasers is a thin layer of gold, either deposited intentionally or as a result of deposition from a gold catalyst during operation over time. Your observation of the short-period axial rings within the tube indicates to me that this was intentional deposition; the cavity has been scribed to remove the gold coating to create electrically isolated regions of the gold film to ensure the voltage gradient within that island is less than the cathode voltage drop. The first CO2 lasers were what are called "flowing gas" lasers. The discharge process breaks the CO2 down to CO and O2, which poisons the lasing. So, originally, the solution was to continuously flow CO2 in from one side of the cavity and extract it from the opposite side. Then it was discovered that gold can be used as a low temperature catalyst at low pressures to significantly enhance the speed at which CO2 is reformed within the cavity, allowing for a completely sealed laser. See DOI 10.1109/3.29314 "CO2 laser performance with a distributed gold catalyst" John A. Macken 1989 for details.

The HV supply components with the gold heat sinks appear to be diodes in a full wave bridge, there are then filter caps, an isolation transformer and the power MOSFET is probably switching those potted inductors in a flyback transformer arrangement to generate the HV.

Perfect content. Would it be possible to enable video stabilization? In extream dizziness, I managed to still love your video.

can you scan the schematics? should be interesting see the circuit diagram!

Nice find! Also nice Comair Rotron fans at 8:36!

I installed two similar linear PSUs like that in my custom modular synthesizer cabinet.

Hi! Super Pulse is a term used for "triangular" like pulses, that reduce thermal damage to the tissue, while keeping average power output high(peaks of the triangles higher than the square pulse ones). Also, super nice find, and video.

got a 90W medical laser recently, had over current protection error too on startup.. was just a loose bodge wire. It was 810nm and 3x30W diodes with watercooling everything crammed into a 50x30x15cm case. interessting device, did some burning tests and then sold it again for huge profit. the foot pedal was pneumatic and it didnt had isolation transformer inside.

@joeambly6807

7 жыл бұрын

how much did you sell it for?

@gamerpaddy

7 жыл бұрын

around 900. burning video can be found on my channel somewhere

Hotwiring a medical grade laser apparatus LOL I love it :D

the interior of the glow discharge tube is coated with a sputtered gold catalyst. this is literally pure gold, which is in a monetarily inconsequential amount, which allows for CO and free O to recombine catalytically, to drive the CO2 concentration up. It simply allows one to drive the laser current higher without losing power due to CO2 dissociation. The sputter method of deposition leaves bands of fuzzy pink/gray gold in discontinuous patches which cannot short the axial current flow. There are better ways to deposit the gold catalyst, but never mind that. It's possible that the sputtered gold was "scratched" or cleaned so that accidentally "heavy" coatings did not short the discharge current. Another one of your videos shows a wired wrapped (apparently) around the outside of the discharge tube, and that is a mystery to me. The spiral tube leads to the ballast laser mix volume which has been manufactured to be surrounding the discharge tube/cooling tube for mechanical simplicity and stability. Since a discharge of CO2 creates CO and free O, fresh CO2 needs to be replenished as things like cold cathodes oxidize, hence the ballast volume. As this is a gradual process, there need not be better gas communication than a spiral tube. For sure there should be a greater path length between the cold cathode's HV and anything else it could discharge to associated with the ballast. Again the patchy/periodic discoloration on the interior of the discharge tube is sputtered gold catalyst (pure metallic Au) in quantities not worth thinking about. Oxidized Au is pink in the very fine "islands" of gold particles, and the reduced form looks gray. This can change dramatically if operated in a flowing configuration by adding trace H2O. The catalyst can be activated or deactivated in this way, changing the catalyst color and the discharge color from a nitrogen pink to a CO white. It's very striking. Stop burning targets laid on the output coupler! Good god! Also, am I seeing people without appropriate eye safety gear? No joke. Aligning the articulated arm - give up now. I've seen techs who specialize in this and it's highly non-trivial. You somehow got the damaged elbow fixed - good for you! Very lucky. Next, please stop touching all the electronic components with your fingers. Gesture with a non-conductive utensil. Intentionally opening an oil-filled HVPS. What can I say? I would hope you consider telling your audience to NOT just casually buy things like lasers at auction and mess around with them. There are so many things in a laser that can kill, maim and blind, and I haven't seen you showing good HV sterility behavior. This is super-dangerous stuff in terms of electrocution, and should someone catch a glint of laser, it can easily cause lesions on the retina, or the cornea, depending on wavelength. Give people a warming regularly please.

@KallePihlajasaari

2 жыл бұрын

I would echo these warnings for those new to the field. A unfocussed 40W CO2 laser beam will cauterise your skin if you swipe your hand through the beam, there is no visible beam though air to warn you even if the pointing laser was switched on. Those scratched rings were something I have not seen on modern tubes but then I have not gone looking for them.

BTW, The spiral part of the tube is a co2 gas return tube, as it's a flowing gas co2 laser.

+1 because Trixy makes an appearance.

That high voltage power supply, is probably some sort of resonant converter type; using it to charge up capacitors for the laser to discharge

@KallePihlajasaari

2 жыл бұрын

Unlikely, both tubes are continuous DC lasers.

Man, I've got to know which scrap yard you find all these goodies at. I see that laser delivery arm, and can't help but think laser pantograph.

Epic stuff, what a scrap yard find! Wouldn't half mind a CO2 like that in my lab.

WOW! Do they really need all that circuitry?

most elaborate cat toy ever

Mirror coating is most likely gold, like the James Webb mirrors, reflect IR most prodigiously.

Those door interlock switches are quite common on HVAC equipment doors like small oil furnaces in mobile homes.

@zrobotics

7 жыл бұрын

I had never seen one where you could pull it out to disable the interlock, but I don't work on large HVAC equipment. Any particular brands where these types of switches are common? I could use some for my projects, rather than bypassing them with alligator clips.

@TechGorilla1987

7 жыл бұрын

I think this is the switch that you're looking for. Has a NO and a NC. this is the one I replaced on my old furnace years ago. Google search for the following:Miller Nordyne CMF Mobile Home Furnace Door Switch 30462900

@TechGorilla1987

7 жыл бұрын

www.ebay.com/itm/Miller-Nordyne-CMF-Mobile-Home-Furnace-Door-Switch-30462900-/131978830619?hash=item1eba8d231b

@zrobotics

7 жыл бұрын

Thanks, that looks perfect! Not too bad a price for the current rating, either.

how much did this cost at the junkyard

Quite interesting. Any chance we can see more of the arm design you described?

@tesla500

7 жыл бұрын

What did you want to see about it? Will be shooting another video shortly, I could add it in.

@manickn6819

7 жыл бұрын

You described how they got the carbon fiber tube to stay true. I would really like to see the counterweight and how the mechanism looks. Probably a sketch since it may be difficult to get all on camera. Dimensions of the tube and how it compares to the size of the laser beam diameter that travels in it. Is there a focusing mechanism at the business end? Any shots of that would be really nice too. Whatever you can get without contaminating any mirrors with dust of course. Really is a fascinating piece of equipment. Thanks.

cutest Allen wrench set ever

The coolest thing about this video is that you have David Gilmour as a patreon :P

I kind of want one of these lasers now. Though ill probably finish my homebrew CO2 laser before i can get one. (the homebrew laser is going to take a while, since im working on other projects right now)

The spiral increases the patrh length of the discharge so hatit akes the shorter (and hotter) path through the4 fenter of rthe resonaator tuber. The gas reeroir has tro be in ontract with the ischarge area to keep the nitrogn helium DO2 mix refreshed.

Does it burn?

Fancy woodburner you got there.

really awesome!!

It is called an impedance tube. Photon 939 is correct.

not sure if I ever had seen a teardown with more than 1 person. seemed to have worked well though.

@zrobotics

7 жыл бұрын

Even if the other people are just standing around, its not a bad idea to not be alone when playing around with high voltage equipment. Even if you are being careful, bad things can happen very quickly. Plus, I'm sure his friends were pretty excited to help out with this.

A fun night out with the boys that must've been xD

Hah! That's the booger the credit-card processor circut landed on in the latest WIM video!

laser etching don't even lie... you have plans on making an ion cannon

superb!

Nice tear down. Partly because of the relatively low volumes, and partly because of the industry mentality, deep pockets, and high barriers to entry, high tech medical equipment is often very interesting and often surprisingly poorly designed and/or rather crude and DIY-ish. I've not seen many medical tear downs where I would have ever been proud to be part of the design team. A $49 prepaid no-name smart phone is usually much better engineered overall. But it's all about volume and competition or the lack of both.

Can you buy these things in the US without any license?

@KallePihlajasaari

2 жыл бұрын

Not from a medical equipment supplier. Occasionally they do come up for sale as scrap in funny places but more so in countries that have less medical industry authoritarianism. Keeping a tight grip on the industry focuses profits to the incumbents.

60W of thumbs up right there

Laser dot detector works well, your cat found it 😅❤

"While waiting for the screens for the camera to show up, I got bored and..." **LASER!** ? :) Edit: Also.. Pretty laser! The big glass tubes look so nice lit up!

That's made where I live!!!

wow! what an awesome device! #everyday

nice junkyard score!

9:02 Minecraft switch sound :)

The oil in the high voltage transformer could be PCBs and not good for your health. Very expensive to dispose of. Cheers Dave

More on that!!!

Sealed it with MIL-A-46146...very expensive stuff

What are you doing?! Call Surgilase!!

no idea why im watching this, but i guess it's quite interesting :)

Fancy laser!

could you not use it for welding or for LASER soldering I hope that you are are going to reassemble that unit after the teardown and just fix the bad component to get the unit working as I think that it would be a bad idea to totally disassemble that unit when it would make a really useful tool for soldering components with actually touching them or welding broken items together.

@joeambly6807

7 жыл бұрын

periods

Laser output window is probably damaged now. objects that burn and produce smoke and carbon should never be placed near the laser output. The smoke or carbon could absorb the CO2 wavelength and severely damage the ZnSe window. white smoke is less dangerous, black smoke -> good luck with your laser. :)

and remember: do not look into laser with last remaining eye.

Did this cost you anything?

@tesla500

7 жыл бұрын

$50

@zrobotics

7 жыл бұрын

That has to be the greatest junkyard find in a long time, there's more than $50 worth of scrap metal alone. Can't imagine what their disposal cost would have been, so they still made a small profit... Definitely a win, since the CO2 tube and HV supply are still functional.

How much did you pay for that unit

@tesla500

5 жыл бұрын

I think it was about $75

@rumblertag8933

5 жыл бұрын

Im guessing that was just scrap price im sure if you refurbished it or sold parts you could definitely get money back

13:45 Applied Science has a ruby laser that looks very similar. The spiral bit of glass is used to excite the atoms in the rod to produce the laser. I'm not sure why it's open on one end though. kzread.info/dash/bejne/iIeYt7Ntn7Gxmaw.html

@KallePihlajasaari

2 жыл бұрын

Not a flash lamp. A high resistance path that allows the gas to slowly recirculate but not form an arc.

Laser soldering?

@MrDubje

7 жыл бұрын

Not going to happen unless you want to loose your eyesight or want skin damage. Even if it heats up the shiny solder till it melts, it will reflect the invisible laser beam everywhere in a random fashion. It is the same sort of bad idea as putting corrugated iron under a industrial laser cutter. You WILL regret it.

@ElectricGears

7 жыл бұрын

I'm not saying it isn't dangerous, but no more than a hand held engraving/cutting setup.

@MrDubje

7 жыл бұрын

My bad. I interpreted your message the wrong way because of the word "soldering". I just wanted to point out that that might be a very bad idea. As a wood engraving tool, it should work wonders. :)

Nice, just nice, that's all.

Are those capacitors live?

@tesla500

6 жыл бұрын

Edit: Which ones are you referring to? Thought you were referring to the other laser teardown

@michaelsimons8990

6 жыл бұрын

The Surgilase 60W CO2 laser teardown and test. Referenced at 8:01. Thanks for the fast reply

@tesla500

6 жыл бұрын

That entire circuit is mains referenced when connected to power, so those would be live when power is applied.

@michaelsimons8990

6 жыл бұрын

So would they discharge safety?

in the compartment that had the arm has a reset button why u no press

@tesla500

7 жыл бұрын

I did, it just resets the control circuit, doesn't actually clear any fault codes.

Dude!! Awesome!!! When I watch a video like this... I realize at the ripe old age of 34 that smoking weed my entire adult life to this point has been a massive waste of time... I don't understand 90% of this but holy fuck it's cool!!!!!! I gotta lay off the dope... KIDS! Don't Do Drugs!!!

@daephx

7 жыл бұрын

Masaharu Morimoto you can still be a functioning pothead. you didnt manage yourself well.

@huyked

7 жыл бұрын

34 is still relatively young. You can change today, and then when you're older, you can look back and say, dang, look at all I accomplished when I put my mind to it. Really, it's all about mentality/viewpoint/perspective. Once you get pumped about something, have a goal and purpose in mind, you can accomplish things.

@daephx

7 жыл бұрын

I like that man, do what you want but always push to better yourself.

@huyked

7 жыл бұрын

+DemonPhoenix42 Thanks. And so true.

@masaharumorimoto4761

7 жыл бұрын

With fucked up abusive parents, and no help from the community/authorities... I was doomed from the start...

You never dida an update on this laser! Every video you make is about something cool but you make them soooo rarely :(

dude burn more stuff??

aaahh, the call for service 31 error, you're out of red laser fluid.

400 nanometer not mm. It's a wavelenght filter

@sbreheny

7 жыл бұрын

Look again. It does say 400mm. Also, 400nm wouldn't make sense when this device outputs a way longer wavelength than that.

@felipelicon

7 жыл бұрын

Sean Breheny gotcha!

AIR PURGE!

Just my opinion - stop tearing things down as a matter of course. Yes you get obscure error codes, but the chances of more than one thing being wrong (or even complex) is very low. You're very close to having functional lasers at first power-on. Most typical failure modes for CO2 medical lasers (with "enough" hours on them - see the Hobbs meter), low gas fill. Give it a recharge. Sub-circuit failure, where some fuse is tripped for a silly reason (water reservoir got a bit too warm). POST tests, which is where you see your failures, are checking for operational sequence failures. One must have a manual for this unless you're much sharper than I am. Do nothing with that delivery arm cattywhompus. CO2 lasers are among the most robust and simple gas discharge lasers, so you have some chance getting them running with your own power supply, but for sure, other more exotic lasers like argon, fiber laser etc - much much more complex, requiring rather exotic test equipment. Good luck.

Now I know why those co2 lasers cost so much on ebay their huge

@rocketman221projects

7 жыл бұрын

That's just a tiny one. The multi kilowatt CO2 lasers are much more impressive.

@everythingquads

7 жыл бұрын

And exponentially more expensive.