/diy/ - Do It Yourself

>>634117
Why? It will cost more than if you just bought it, it will perform worse than if you just bought it, it will probably break sooner than if you just bought it.

If you really want to print an engine, you should redesign it so it actually offers some advantage to 3d printing it.

>>40% bronze
I wouldn't trust it. That sort of stuff is primarily for jewelry. Keep in mind that most of these manufacturers over report their material properties. I'd also be worried about fatigue, but you might just assume the worst case and calculate how long it will last and see if that's acceptable.

>>634140
>>they are using Selective Laser Sintering
Nope, they are using Selective Laser Melting(SLM), which is even more complicated than laser sintering.

SLM printers are way out of reach of hobbyists. Not to mention the HIP* machine needed for post processing to make strong components.

You also have to remove supports, MADE OF METAL!

>>634262
They also almost definitely HIP* all their prints.

*hot isostatic pressing, all you need to know is that it's really expensive

>>634330
Don't expect it to work the first time, you will probably have to redesign after getting your first print back.

>>634551
nothing at all. This is done sometimes with profession FDM printers. The general process is coat in plaster, and stick in an autoclave.

>>635061
The material properties for the 3d printed part will differ quite a bit. It differs from casting in that you don't have to make a mold and can easily make things that are difficult to mold.

>>611667
>>611558
For small production runs 3d printing is the way to go. It's a lot cheaper than making molds.

You can make an injection mold system for REALLY SMALL parts, but not stuff much bigger.

Now if you don't like the cost of 3d printing, or want to do a large production run, you can print a positive of what you want to make and do urethane casting.

>>551442
wow that's pretty cheap for an objet machine. The technology will get cheaper, it's simply a matter of mass producing it.

Did you not see the cheaper version of that in>>551440? It's literally just a RAMPS, some brushes, a DLP projector, and an ultrasonic cleaner.

Now go build your cylindrical machine.

>>551410
It is only a matter of time before inkjetting resin gets cheap.

In the mean time there's pic related, which is only limited by the fact the researchers were too lazy to dye their resin.

>>551408
controlled.

>>551389
This has far more complexity than the octopus

The other is more of a demonstration to show what can be done.

>>551121
>>Not if you need it to float in saltwater.
You don't it's really cheap to add 1 stepper motor.

>>Are you saying the current market for 3D printers (Remember folks, FDM is a registered trademark!) is vulnerable to getting washed out by cheap Chinese printers
3d printing and 3d printer are also registered trademarks.

No, not just Chinese printers, but American made printers. Some big american companies have said that once they see a market for consumer 3d printers, they will take it over.

3d printing hit peak hype a couple of months ago. People currently expect more from 3d printers than they are currently getting. Once people realize this, the market could collapse for a bit.

>>551183
>multi colored objects with resin
yes, pic related

>>That's why kickstarter.
crowd funding is also near peak hype, and could collapse here pretty soon

So you'd better get your printer working here pretty soon

>>551062
>>Cost per unit produced is still way to high for full production runs
If you are making a small production run(IE for aircrafts, super cars, medical equiplement) or a small product it makes sense today.

>>551041
3d printing is the past, present, and future.

Please don't over-hype it!

>>550497
A cylindrical printer has the problem that the further one is from the center, the less accurate one gets.

>>the only experience I have with creating and programming machines was with those motorized legos with a yellow box when I was a kid.

Then build one out of legos:
http://www.instructables.com/id/Build-a-Polar-3-D-Printer-from-Legos/

>>550487
Resins can be decently strong, many of them are essentially the same stuff in epoxy. One can even make ceramics by embedding ceramic particles in the resin.

>>550492
>> I think it will have problems making structures like honey comb fillings and other stuff like that.
nope, not a problem, one just adds tiny holes to drain the resin

Stereolithography(resin printing) has quite a bit of advantages over FDM can be very accurate and very fast, like VERY FAST!

The only thing holding back resin printing is the cost of resins and the fact that resins degrade when exposed to sunlight(almost like vampires)


OP, this is a bad time to get into the home 3d printing market as there currently is a bubble that is about to burst.

There are more FDM machines on the market than you'd believe and if some big company decides there's a market for home 3d printers and start mass producing them, they will destroy the market for 'amateur made' 3d printers overnight

>>530859
>>I have 3d modeling skills, as well as a 3d printer.
Do it.

>>526193
No, Chinese fighter jet

>>525930
Pic related was made essentially that way. It's cheaper to jet titanium down and mill it precisely later than it is to mill it down from a solid block of titanium

>>526042
We don't know if the fundamental process,diamonoid mechanosynthesis , required for all molecular nanotechnology is even possible and it's going to take lots of computational chemistry and lab work to verify it.
http://en.wikipedia.org/wiki/Mechanosynthesis#Diamond_mechanosynthesis

We have yet to even meet technical challenge 1 here:
http://www.molecularassembler.com/Nanofactory/Challenges.htm#TCDMS

almost all nanotech research today is glorified materials science.

>>525850
There's really nothing to it. 3d printing is a new field, you could learn almost everything there is to know from a couple of books.

>>525880
Well, if you're going to go indirect, you might as well just print the molds. One might be able to use a DLP projector to cure some resin mixed with alumina particles to make ceramic molds.

This has been demonstrated professionally and was shown to be precise enough to make molds for jet turbine blades. The process was so precise that a new file format had to be used, because STL just wasn't high resolution enough.

>>525840
>>Nanorobotics... So how far have we gotten on that?
We have yet to verify that it is even possible.

>>525811
Why does everyone always ask for blueprints, in all of my engineering career I have never seen 'blueprints.' No one uses 'blueprints' any more because of CAD. And the companies that have built metal 3d printers aren't going to give you 'blueprints' if they had them.

>>what kind if engineering degree will I need to build one?
mechanical

It is going to be very difficult to DIY a metal printer. The best you could probably do would be to print solder like the RepRap people are doing.

For anything that isn't solder, metal printing requires real-time feedback control, inert gas/vacuum chambers, high power lasers/electron beams/welders, and special post processing.

You could also try this:
http://creativemachines.cornell.edu/sites/default/files/RPJ09_Hiller.pdf
Make a machine that glues metal ball bearings together to make stuff.

>>525821
That's one way to do it, replace beads with fine metal powder though

The only problem with metal powder is that it is explosive so you have to be careful working with it.

>>if you can design a nozzle that lets out beads of molten metal you just made millions
Done years ago with the laser engineered net shaping process

>>511359
So do you have a Multimaterial Objet260 Connex 3D printer?

>>498211
Cool, now make pic related in less than a week.

>>500194
Mainly because they aren't aimed at consumers and because 3d printing as a service is more profitable than 3d printers.

>>471906
>>non-laser powder sintering
this has been tried before, in fact, you don't even need to use an LED.

Desktop Factory(a company that is now bankrupt) used a halogen lamp to sinter powder like pic related.

The only problem with this and your approach is that you have to scan an LED or other point light source across the powder, which is slower than scanning a laser.

A company called Sintermask also uses a non-laser approach to sinter powder, they use a nice bright light directed through a mask to sinter powder.
http://www.sintermask.com/theplan.php?cmd=1

As this exposes an area and not a point, it is quite a bit faster.

Lasercut pieces of paper, stack them up and glue together, CONGRATULATION! You have made a 3d printer.

>>459366
That'd be Jeri Ellsworth:
http://hackaday.com/2010/05/13/transistor-fabrication-so-simple-a-child-can-do-it/

>>459123
DIYable, but you won't be able to make very good chips:
http://ajp.aapt.org/resource/1/ajpias/v73/i10/p980_s1?isAuthorized=no

You can probably find it somewhere free on the net, I'm sure of this.

Also, pretty much all lithography is done in first world countries by robots, because humans are too dirty for making chips. Electronics are assembled in China though, because labor is cheap there.


>>459168
>>459163
It's true, pic related. Met a German guy doing exactly this with a home made machine.

>>459166
Can't do copper though.
You can with another process, but that's $$$$ and there's no way you'll be able to diy that.

>>450657
Shapeways has some of the most reasonable prices out there when it comes to 3d printing.

Mind giving bounding box dimensions(height, width, etc) of your wheels?

Z-height and bounding box dimensions matter more in terms of cost than volume of material used. Service bureaus want to fit as many parts into a single build chamber as possible and you have to put some distance between parts so they mess up other parts.

In short, make your parts smaller. Of course shapeway's pricing algorithm might heavily weight material consumed, just to make it easier for you to calculate, so you might be able to game it by putting lots of tiny holes in your part. Like pic related

Now if you really want to be an asshole, you make your holes really really really tiny so they don't come out, but the volume calculator still thinks your part has almost no volume. Your STL file will end up huge and I'm not sure if this will work. Worst case, it comes out very bad and fucks up their machines.

Yes, all you do is get regular sheets of paper, lightly douse them diluted water based adhesive and compress together.

IN FACT, this is how one method of 3d printing works, you put down a layer of paper, cut it up with with a knife, spray some glue on the top, and then put down another layer of paper.

Pic related was made this way from regular A4 paper.