What is Selective Laser Sintering (SLS) 3D Printing?
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- เผยแพร่เมื่อ 5 มี.ค. 2021
- SLS Printer Build Video: • Building a Selective L...
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OpenFuse: www.projectopenfuse.com
Selective Laser Sintering (SLS) is a subset of powder bed fusion-based 3D Printing. It’s a fascinating technology that uses powder as a raw material instead of filament or resin. SLS 3D printers use plastic powders while other powder bed fusion printers use powders composed of metals or ceramics. The most common SLS material is nylon, specifically PA12. The nylon powder is loaded into the printer, where heating elements heat the powder just below its melting point and a roller or blade lays down a smooth layer on the build platform. A laser, which is typically controlled by galvanometers (motorized mirrors) is scanned across the build platform melting and fusing any powder in its path. A new layer of powder is spread across the sintered layer and the process repeats, slowly building the part in the Z direction. Powder from previous layers will support the growing print, so no support structures are needed! SLS printers are capable of high fidelity prints, and their speed is remarkable due to the rate at which the laser can be scanned across the platform. This is an overview video of this technology, which teaches the fundamentals of SLS printing through both animations and real-life SLS prints on the Sintratec Kit printer.
#3D-Printing #Laser-Sintering #Powder-Fusion - วิทยาศาสตร์และเทคโนโลยี
It’s crazy how quickly SLS printers are dropping in price. They use to cost an arm AND a leg, but now it’s just an arm. I thought this high-level video of the technology would be useful for the uninitiated. Prepare to see a lot more companies adding SLS printers to their shops and nylon parts to their product lines. Very exciting future!
Just an arm you say :) Tempting...
What animation software did you use?
Iam very curious if You can test it with sand?
One thing to be aware of: Sintering is a process where, by definition, particles coalesce _below melting temperature_ so referring to the laser as _melting_ the plastic powder can be confusing. The plastic powder doesn't go full liquid, it locally fuses together to form a larger solid.
(But, admittedly, plastics tend not to have a melting point, but a melting _range_ so it's more difficult to properly define the start of the true molten state.)
The most accurate name for this process would be SLF: Selective Laser Fusing. But SLS is much more common and there are already enough abbreviations out there, so SLS will work. (For background: MSc in Materials Science & Engineering here)
Yes! I talk about this topic in my big build video. SLS is a misnomer and really you get a spectrum of melting and sintering (i.e., fusing)
I'd just like to interject for a moment. What you're referring to as Linux, is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX. Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called “Linux,” and many of its users are not aware that it is basically the GNU system, developed by the GNU Project. There really is a Linux, and these people are using it, but it is just a part of the system they use.
Linux is the kernel: the program in the system that allocates the machine's resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is normally used in combination with the GNU operating system: the whole system is basically GNU with Linux added, or GNU/Linux. All the so-called “Linux” distributions are really distributions of GNU/Linux.
@@zyxwvutsrqponmlkh ever read a comment and think it's not supposed to be here...... 😂
I surely cant wait for when these become much more mainstream...
Wow, that is outstanding content Dr. D-Flo! Thank you so much for sharing your experiences - we look forward to seeing more!😃
We are about to add an SLM Solutions printer to our shop. We might be interested in one of yours as well.
Awesome intro, looking forward to watching the build later when I get some free time.
Very well made video. Thanks for the OpenFuse plug!
Yah man! I’m exited to build the OpenFuse
As always AWESOME video.
You could make a video showing some strenght tests with these prints
Maaaan, great explanation! Thank you
Thanks, very easy to understand :D
What kind of density loss do these parts experience compared to say a cast nylon part? Or is there 100% density?
Amazing!!
Is SLS Nylon powder safe to snort? I’m worried because I accidentally snorted some thinking it was cocaine.
Which vacuum cleaner do you use? A normal one or an atex z22 suggested by many printer producer?
Real cool...
Great video! So this is stronger than the 'common' 3d print material - makes sense. I'm sure this depends on the raw material you are using, but do these SLS parts have a higher operating temp than the 3d printed products? Say you are interested in making something to work in a hot environment... thanks!
The real magic, I believe, is to use the philosophy of Bruce Lee, which is to analyze many different methods, take the best from them, then throw away the rest. For 3d printing, this means taking the best from plastics 3d print technology such as FDM, Resins, SLS, Jetting, etc. and the best of metals 3d print technology, and building a printer that is truly fabulous.
For myself, this means increased quality & speed, while lowering costs.
Freakin cool
So you could make the wilson airless basketball???
What about bending after print? Resin does that ant seems like its inevitable. What about laser-resin and laser powder prints??
Note that _sintering_ has a very specific meaning; if you use heat sufficient to _melt_ the base powder, it's not sintering, it's liquid fusion. Sintering is often used with metal powder compressed in a mold, then heated to a temp _below_ the melting point to fuse the particles. At or above the melting point is SLM, Selective Laser Melting; we use that to make jet engine parts. Less porosity, more power consumption.
From the description, this sounds like SLM.
I'd just like to interject for a moment. What you're referring to as Linux, is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX. Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called “Linux,” and many of its users are not aware that it is basically the GNU system, developed by the GNU Project. There really is a Linux, and these people are using it, but it is just a part of the system they use.
Linux is the kernel: the program in the system that allocates the machine's resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is normally used in combination with the GNU operating system: the whole system is basically GNU with Linux added, or GNU/Linux. All the so-called “Linux” distributions are really distributions of GNU/Linux.
Great video, but that F/C scale on the thermometer both going 0-150 did somehow trigger me haha
Is the powder toxic? Nylon may not be good inhaled
That's interesting! I wonder if you can print aluminum like this
I know, right?
I'm impatiently waiting on the day where additive metallic manufacturing is something I can have in my workshop!
Can I find ppl to SLS print stuff for me? Is it possible to make flexible parts?
I'm thinking of getting a SLM Solutions printer. The cost is kinda up there.
I am applying to a company that does SLS printing, can you recommend any resources for learning everything I can to prepare?
how did it go?
What if I put it in water tho?
I’ve only just learned about what an sls printer is. I’d never seen something like that before, but then I looked at the price and now I know why 💀
Sweetheart and cool content
What is the SMALLEST size a SLS printer can print (in MM please)
Depends on the printer, but 0.5 mm is about the smallest feature size I have attempted. Too small and the part breaking during powder cleanup.
vanakam da mapla SINCET lanthu
I like the e-beam version better.
50 benjamins, 5 grand is not cheap.
The only downside to SLS 3D printing is that it's expensive, right?😬But the 3D printer was conceived to print unique products.
Doesn’t this type of printer have metal capabilities?
No it does not. That would require a much more powerful laser and a inert environment to sinter the metal. Much more expensive
@@DrDFlo Thank you for the response! I meant SLS in general. But I see that the inert environment is key here.
Additive manufacturing by using metal powder and a laser to sinter the powder into a part was first tried in the mid Eighties, sponsored by DARPA. Commercial SLS (Selective Laser Sintering) 3D metal printers have been around some 15 years now. Sintering means the powder does not go into the liquid state, it fuses below melting pont. With increase in available laser power and advancements in optics, about a decade ago it started to become possible to do SLM: Selective Laser Melting.
With SLS you can get to about 95% of the density of bulk metal. SLM can get to 99,9% density and better. SLM printed parts are therfor much better in terms of strength.
And yes, a full metal SLM printer will be at least the size of 2 or 3 full size standing fridges and may cost more than a house. Or several houses. Also, the "toner", the very fine tightly controlled metal powder, is extremely expensive. Roughly 10 times as much as the bulk metal.
Why isn't anyone selling assembled kits? Add $1000 for assembly and sell turnkey.
who disliked this lol
Looks too grey. Possibly a large grain structure. Needs a stronger laser and a kiln to anneal it all together. Then you could probably drive a car over it.... probably
I bought one of these printers only to make a case for my iphone, then I threw the printer away cause I was done with it. Im a 1%er, money dont mean anything to me.
Sure buddy