Hi John This was just a quick taster exploration to see what may be possible with a variety of materials. I will be following up to see if I can understand how each one happens. The acrylic in particular is interesting because as I demonstrated first, the light passes straight through acrylic with zero effect. It's got a few people guessing about what I did and how I managed to damage the inside and not the outside. At present I don't understand all the physics even though I know what I did and essentially how the effect happens. Best wishes Ruiss
I hate to think how much that laser would cost, maybe best I don’t know, too cool! Great video very interesting, now back to my china grey that I unpacked on the weekend. Wish they had taught lasers at school I would have been much keener on going. Keep up the good work, thanks.
I was wondering if NaCL would feature in there😄 So pleased that common chemicals can do the job! And I imagine that marking a full extents slab of wood would progress much faster on a fibre laser than on a common diode laser with cartesian movement on the more clunky hardware vs the galvanic control. Also a saturated saline solution can be rolled on to cut down on time. I was curious though, to see if you would try something like copper sulphate to see what colours you might get. It would also be interesting to mark on a periodic table those elements that can be marked, though of course it get more complicated when you are using compounds rather than raw elements. Sodium, Carbon and the common alkaline earth metals have some gaps between each other on the periodic table so you can probably predict other likely candidates.
I was a bit careful about chemicals I tested because most uses for this type of marking are for products that may be used with food.. Thats why I finally settled on baking soda as being the most user friendly. At the time I did not have T1O2 on my radar. That may be the best and it is also used in food products as a colouring
@@SarbarMultimedia I considered Titanium dioxide too but forgot in my comment. It's widely used in concreting both for strength and as a colourant. Wasn't aware it's used as a food colouring product! I wonder what it's LD50 is? Which reminds me of another I was considering, Borax. It's LD50 isn't much lower than table salt which would make it pretty safe. It's anti microbial but it's also a required trace element(boron) in our diets. It sits just above Aluminium in the periodic table but it's in the semiconducter group. Borax is uses as a flux and oxidation protectant in the foundry industry Borax contains boron, sodium and oxygen so it would likely have the sodium atoms agitated and possible the boron atoms too. It's listed as Na2B4O7·10H2O
Hi Jake It actually marked better than the CO2 laser and in a fraction of the time, Bear in mind this was just a fly by visit to the subject. I will be exploring each of the things I touched on in future sessions explring things like photo engraving on granite and at what resolution etc. Best wishes Russ
@@jakesaari7652 I haven't tried Granite, but I will be in the next few months. But I do a lot of photos on slate with my fiber. It looks great. drive.google.com/open?id=1AHSImKlatxE-scHnWRNej6CUJqOCMQQr drive.google.com/open?id=1mSXdQhbeqpqx3h5tEqy2gISMz1JYkS59
Hi, Russ, it's great to find your 2 years ago video!!! I have been plagued by the 1064nm fiber laser marking wood problem for months. I just want to figure out why the wood can't absorb fiber laser? But woods can absorb the 10um CO2 and 450nm diode laser, you can use them to mark or cut woods. Wood can absorb (react to) the laser with bigger and smaller wavelength, but just can't react to the "middle" type laser at all. I really think it doesn't make sense.... Or the "absorbing" is not related to the light's wavelength but other properties. Really looking forward to any inspiration from you!
Hi Damaging materials with a laser is not the very simple thing that we all see. There is a lot of physics and chemistry happening that is beyond most people's "need to know". If it works then let's just use it. Let's start from square one and briefly try to drag you through the principles of what's happening. 1)Sound waves are invisible pulses of energy that make our eardrums vibrate . That is something we can all relate to. Light waves are also invisible pulses of energy that make atoms and molecules vibrate. Sound waves that we can hear are at about 20 THOUSAND cycles per second. 10.6 micron wavelength light is 28 BILLION cycles per second and 450nm light is 666 BILLION cycles per second. 2)All atoms and molecules are vibrating and the amount of vibration defines their temperature. Thus , when a molecule vibrates faster , we measure it as increasing temperature. This is a vital piece of physics they dont tell you about at school. So let me restate that in a different way. When things get hot, it really indicates that the molecules within the material are vibrating faster. 3) All molecules are made up from different types and numbers of atoms. Atoms are the bricks and molecules are the house and it is cement that holds the bricks together to create an end product. In the molecular world it is things called bonds that "stick" the various atoms together to create molecules. These bonds are not physical (as in the case of cement) but some sort of strange attractive forces that you may imagine as gravity or magentic attraction. The bond strength between different atoms can vary a lot, some bonds are very weak and some are very strong. Lots of the same molecules creates a material. 4)Here is where I hope your imagination can handle an analogy. Return to your childhood and In front of you there is a table. It's your birthday, so on the table is a jelly (gello) and a birthrday cake. Thinking it would be good fun, you grab hold of the table and give it a gentle shake. I think you can imagine the jelly wobbling but there is no effect on the cake. You have just been acting as a lightwave and the frequency with which you shook the table had an effect on only one of the materials (the jelly). Your stimulation translated to mechanical motion of the jelly. 5)The frequency of your shaking had no effect on the cake because the molecular bonds in the cake are much stronger than those in the jelly and require much higher frequencies to "wobble" them. If you were able to shake the table at a high enough frequency then the cake would crumble but the jelly would remain uneffected..I hope this little amusing image allows you to visualize what may be happening inside wood. There are certain frequencies that will stimulate mechanical motion in molecules and just like the world of sound, there are resonant frequencies and harmonics that will still have an effect. 6)A laser beam is a special stream of light energy. IT HAS NO HEAT. A stone falling fron the sky is harmless but has energy that never appears as anything else until it hits you on the head. Only when it hits a SOLID surface does the energy convert into a mechanical form.That is exactly how ligh tworks. It hits SURFACE molecules, adding extra energy that then vibrats molecules faster. Remember that faster vibration means inceasing temperature. We see the laser beam making paper burst into flames and logically imagine the cause to be a HOT laser beam. As I said earlier, the laser beam has no temperature, just energy that gets translated to mechanical kinetic energy when it meets a molecule. The molecule shakes harder and harder (the temperature rises)as it is continually stimulated by light energy. At some point (every molecule is different) the shaking becomes so violent that one or more of the atomic bonds breaks and free atoms escape to join with other atoms and the original material is no more. So that paper I mentioned, did not catch fire it reached a level of vibration that caused it to self-desrtuct. All sorts of new materials were created by this process, Solids like ash, gases like carbon dioxide, carbon monoxide, complex hydrocarbons that were further broken down if they happend to be also stimulated by the laser beam and the resulting exothermic reaction created the flame we observe. As I said at the outset there is a HUGE amount of chemistry happening when we stimulate a material with laser energy. 7) The final concept you must include is light intensity. Imagine yourself to be a molecule. Being hit by a feather would not cause you to jump very much whereas being hit by a higher INTENSITY energy source like a bullet would certainly stimulate rapid movement.Thus the more intense the light the faster a molecule will be stimulated to self-destruct. THAT IS THE WHOLE PRINCIPLE UPON WHICH OUR LASERS WORK. I hope that putting all those concepts together will answer your question. Best wishes Russ
I will be doing so experiments with this deposition idea on other materials in due course. This was just a quick "fly by" to seewhat may be possible with this machine. Drill holes in glass may be an issue but if I could achieve the same effect with clear polycarb then that would be useful for you Best wishes Russ
@@SarbarMultimedia You might be interested in the ThoughtEmporium video titled 'Growing Human Neurons Connected to a Computer'. He uses a home-build DC sputtering magnetron to vapour deposit metal onto a slide. He's using a vinyl cutter to mask off areas to try and get a sterile circuit board on glass upon which a cell culture of neurons can be grown. I think you might have just hit upon a way to produce the same slides with a fraction of the effort.
@@ThingsWhichArentWork Hi Jim Certainly copper looked like the metal that bonded to glass the best. I'm just playing with no real purpose. I'm a bit like a test pilot in that I'm exploring the envelope of this machine to see what its capable of beyond all the normal things that this machine gets sold for. If you can find a useful novel application then that's a brilliant bonus.Best wishes Russ
Hi Great observation, Yes I do know the composition of water but that was a verbal slip of describing how it reads . Thanks for reminding me about that big gap between my two remaining grey cells!!! Big smile Best wishes Russ
Hi Mr Russ. I'm using Ezcad to run my MOPA laser machine. I can see the fields of speed, power and frequency. Where do I use the parameter 2 ns and 60/80 micron?
Hi There are two types of MOPA laser. There is a range like this that are FIXED pulse en.jptoe.com/product/lp-e-20w-30w-50w-mopa-fiber-lasers/ and this which have a variable pulse en.jptoe.com/product/m7-20w-30w-mopa-fiber-lasers/ The fact that pulse duration is not showing with speed, frequency and power would seem to indicate you have the fixed pulse model. If it is the variable pulse width model then you must speak to your supplier and make sure you have been supplied with the correct version of EZcad Best wishes Russ
Hi Gary Pure organic materials such as wood paper/card are not affected by 1 micron wavelength light but they are not transparent either so the light will not pass through. Best wishes Russ
Watch the video at 42:23 for the information you require. Please remeber this is a MOPA lfiber laser with a programmable pulse width. If you have a normal Q switch laser these values may not apply. Best wishes Russ
I would like to claim it as a deliberate mistake set to see who was watching properly. Sadly my brain was out of synch with my mouth. However it has had that unplanned effect because you are only the 2nd person to spot it. Best wishes Russ
@@SarbarMultimedia Thanks. I found your videos relaxing, no matter how long, and how scientific, mathematical or 'difficult' might be. Then, yes... sometimes errors may occur as you said. Even commenting your video, I made typo. That I call lazy fingers, where one hand rush at wrong time and wrong keys.
With these Fiber laser videos, are they only for people who own one of these lotus lasers? seems like a very high bar for entry to have a single companies product. unlike your other videos which help people from a wide range of budgets as they cover imported/cheap laser cutters all the way up to expensive ones. So this Lotuslaser company has got you to make tutorial videos for them in exchange for letting you use their product? That doesn't seem like a good deal to me. maybe ask them to pay you for all this work? Its taking time away from videos that have a bigger appeal for your channel
You will note that I have titled it clearly so that you can bypass it . I make it clear that the machine is on loan for me to "play" with. These are not tutorials, training sessions or promos for Lotus Laser, no, they are exactly the same format as my CO2 machine videos..... just me enjoying the discovery of a different technology. However, I do realise that this is not a hobby machine and because this is a even rarer MOPA laser, it's a very niche group of people that wish to look over my shoulder. There is no contract, no research program or requirement for me to anything specific with the equipment, it is an out and out gamble on their part to trust and old guy with an expensive bit of kit. Even I did not know what I was going to do with it but as time goes on I am finding some fascinating science to understand and ways to use the machine that many will not know of. Lotus Laser are happy for me to share what I discover with you if you have an interest. I have not forsaken my CO2 machines but there are now very few dark corners to explore My learning journeys are very selfish undertakings where I get all the pleasure and enjoyment because my other longtime hobby has been video and editing, I get double pleasure from the experiences. This was never intended to be a long running soap opera, or to make me money (I do not monetize it) or even to gain popularity ( I have no idea what the statistics are). No, this is just me sharing what I am learning. I have worked hard in my career and prepared well for my retirement so I no longer need to earn money. Instead, helping people overcome technological difficulties whilst selfishly enjoying myself brings rewards that cannot be bought. There will be more CO2 videos but only as and when something piques my interest. Best wishes Russ
@@SarbarMultimedia Hi Russ, I'm sorry that my comment has come across so negative, My critique was more that I hope you're getting something in return from working on the Fiber other than being loaned it, as the quality and depth of these videos is wonderful. I'm glad to hear that you are enjoying making these fiber laser videos and yes you're right about the Co2 ones. You've already done a great service in the quantity and quality of videos you've provided everyone. I'd say you should put adverts on these videos and also look at setting up a petreon account. It doesn't have to be about you personally making videos. the money can go towards tests/parts for the videos you make. so you're not out of pocket from making them. even though you're happy to do that. Another suggestion would be to setup playlists on your channel page so people can see your videos in order for each project. a fiber playlist and an RDworks one. I hope that won't be too much work but if you need help with it, I'm happy to explain/guide you through things. anyway I've not said it before but Thank you for making these videos, I'm currently working my way through them. They are much appreciated, especially seeing the trail and error! all the best
