Fiber laser Learning Lab 12 The Search for Colour Part3

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Lotus Laser (lotuslaser.com) have lent me this MOPA 20 watt fiber laser to “play with”. Although I have a moderate understanding of laser technology and how constant power glass tube systems work, pulsing fibre laser marking machines are shrouded in deeper mystery than the glass tube machines. They have been designed for high speed marking and the technology has been well tried and proven. There are limited “tricks” that the pulsing laser technology can perform. You enter predefined parameters for each marking “trick” you wish the machine to deliver , then stand back in amazement. Most correspondents tell me they have bought their machine direct from China and received a machine and EzeCAD software, preloaded with a few default parameters. No other instructions beyond the EzeCAD manual are forthcoming.
I must stress I am neither a teacher or expert in this field so you join me in my learning adventure with the warning that I have a simple but inquisitive mind and will probably make mistakes on my way to discovering the truth. I WILL oversimplify and maybe distort the scientific detail in my quest to build a simple picture of why and how this technology works. I am not trying to reverse engineer anything , just to break through the seemingly impenetrable “techno cotton wool” that surrounds this amazing piece of science.

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11 сен 2024

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Комментарии : 14

@Engraveyourgift 4 года назад

Stress, finishing, part temperature, Thickness, scratches, texture or lines in the sub-straight plays a big part in achieving colors.

@SarbarMultimedia 4 года назад

All the problems you mention just go to support my long held belief that this is a fascinating scientific phenomenon but not a viable production process. It's a great marketing gimmick to see colour appear on the surface of stainless steel from an invisible BEAM OF LIGHT!!! My negative attitude towards this process as it exists today is driving me to understand it. I have searched long and hard and have yet to find a single scientific study of the process. I have encountered detailed studies of the chemistry of the chromium oxide natural film and the way in which various degrees of heating changes its composition, but nothing on the actual physics/chemistry of colour formation. So I am swimming in very deep water and poorly qualified to do so. Every fiber lase machine seller has his own chart of colours and table of parameters. These are very machine specific depending on the power of the laser, the manufacturer of the laser system and the focal length/field size of the laser. .MANY years ago my engineering mentor would regularly preach " When you fully understand the REAL problem, you will be holding 50% of the solution" Thus it is my aim to understand why and how and then to see what I can do to make this process production viable. A dream???? Best wishes Russ

@Engraveyourgift 4 года назад

SarbarMultimedia You are fully qualified you’re no doubt one of the best engineer who is learning and teaching others. That’s very noble of you. In this industry not many people share their knowledge. That is because most of the people who actually develop the systems are passed away. The new generation is just copying and picking up what they visually perceive, not understanding the science behind it. If you can get a proper microscope. That can record video in hi-Rez and slow motion, while you laser the surface you will see it becomes like the surface of the sun you will see material boil and evaporate and splatter and melt into its surface and flow on the surface. It’s pretty cool we did this in the 1990s with YAG lasers. Keep up the good work. It’s hard to give you laser settings because laser settings are different for each machine and Manufacturer. You know that.

@istvantamas623 2 года назад

Thx for your work. I think the metal is live what is in always moving. Different materials, different results. Thanks again and I will start my expirience with this tech. I work wit bigger 4Kws CO2 laser too and I saw lot of exciting cuts. If I want good workpiece it is essential the I exactly know the material quality (components) an laser beam's (and machining's) features. And sometimes the environmental parameters can be change the all technology... This is very sensitable living game.

@jurgenblust2042 4 года назад

Thanks for letting us join the journey. I have a (maybe silly?) question: How is the X and Y movement of the beam realized in the fiber laser machine?

@SarbarMultimedia 4 года назад

Hi Jurgen Take a look at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EFXXGAeS7Cg.html starting 3min 15sec for a visual answer.. Best wishes Russ

@precisionlasersolutions7996 4 года назад

That's a nice microscope you have acquired, glad to see it is giving you a good insight into what is creating the colour differences you are seeing.

@lokuspokus6557 4 года назад

Sir, thanks for these impressive series of videos. For me, and I think for all other China Laser-User, you have discovered so much and have saved us so many time! A huge THANK YOU! But I have got a question. Are your tube clamps availabe somewhere? As dfx, svg or something else? I have to change mine, or at least I did, but only with garage-technology. Are your designs available for free oder do you sell them? Please let me know. And again, thank you very much for sharing you experiences and discovers.

@SarbarMultimedia 4 года назад

Hi All my designs are available for free download from www.rdworkslab.com forum. If you have dificulty then add your disguised email adress to another comment (johndotsmithatgmaildotcom) and I will send you the file. Best wishes Russ

@RadoPa 4 года назад

Would you mind sharing the program for this testing pattern?

@SarbarMultimedia 4 года назад

Just add your email address to another comment and I will get a copy to you and delete your comment/email. Best wishes Russ

@NewHiVibe 3 года назад

Hello hi, Can I ask you what kind of metals are used?

@SarbarMultimedia 3 года назад

There are only two metals that this works on. Stainless steel and titanium. I am told that there are more vivid colours to be attained on titanium. Sadly I never got to try it. Best wishes Russ

@NewHiVibe 3 года назад

@@SarbarMultimediaThank you for your great video and answer!