CECAA850 Posted May 10, 2013 Share Posted May 10, 2013 Lots of implications from this "new" technology.... http://www.guardian.co.uk/technology/2013/may/09/3d-printed-guns-plans-state-department They can take the plans for a plastic gun off the web but leave up plans on how to build a pressure cooker bomb? Quote Link to comment Share on other sites More sharing options...
mustang guy Posted May 10, 2013 Share Posted May 10, 2013 Lots of implications from this "new" technology.... http://www.guardian.co.uk/technology/2013/may/09/3d-printed-guns-plans-state-department They can take the plans for a plastic gun off the web but leave up plans on how to build a pressure cooker bomb? When they figure out how to print with graphene, and they will, we should worry about the printing of real guns. Graphene is substantially stronger than steel and much lighter. A hypothetical one-square-meter hammock made of graphene would be strong enough to support a four-kilogram cat (8.82 lbs.), according to Swedish physicist Per Delsing. The hammock itself, just one atom thick, would weigh roughly one milligramabout the same as one of the cats whiskers. The Warsaw Voice Online, November 2, 2010 Once they figure out how to make 3D bonding take place, you will have a material that is stronger than diamonds. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 10, 2013 Share Posted May 10, 2013 Lots of implications from this "new" technology.... http://www.guardian.co.uk/technology/2013/may/09/3d-printed-guns-plans-state-department They can take the plans for a plastic gun off the web but leave up plans on how to build a pressure cooker bomb? When they figure out how to print with graphene, and they will, we should worry about the printing of real guns. Graphene is substantially stronger than steel and much lighter. A hypothetical one-square-meter hammock made of graphene would be strong enough to support a four-kilogram cat (8.82 lbs.), according to Swedish physicist Per Delsing. The hammock itself, just one atom thick, would weigh roughly one milligram—about the same as one of the cat’s whiskers. The Warsaw Voice Online, November 2, 2010 Once they figure out how to make 3D bonding take place, you will have a material that is stronger than diamonds. Seems like a lot of work to get a cat in a hammock. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted May 10, 2013 Share Posted May 10, 2013 They should make it a heated graphene hammock. [] Maybe sprinkled with a wee bit of catnip. Quote Link to comment Share on other sites More sharing options...
muel Posted May 10, 2013 Share Posted May 10, 2013 Hmmm... I'm thinking the cat wouldn't have much time to enjoy it as those single atom thick lines slice right through it. [] Quote Link to comment Share on other sites More sharing options...
mustang guy Posted May 10, 2013 Share Posted May 10, 2013 Not even a hydrogen atom will pass through graphene. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted May 10, 2013 Share Posted May 10, 2013 Got to thinking about this printer, not for hard things but for soft things like printing Joey Heatherton. JJK Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 10, 2013 Share Posted May 10, 2013 Not even a hydrogen atom will pass through graphene. But a cat is a lot sneakier than a hydrogen atom. Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 10, 2013 Share Posted May 10, 2013 Months ago, I read/heard story of the medical field printing a substructure piece of bone, which then had bone cells placed on it to grow. Once it covered the piece, it was used to fill in a missing piece from a fracture. Perfect fit and healed well. Bruce Quote Link to comment Share on other sites More sharing options...
oldtimer Posted May 10, 2013 Share Posted May 10, 2013 I just had a bone graft using synthetic bone. It seems pretty easy these days. Whether printing matters here is if it is more cost effective. Quote Link to comment Share on other sites More sharing options...
Boxx Posted May 10, 2013 Author Share Posted May 10, 2013 Got to thinking about this printer, not for hard things but for soft things like printing Joey Heatherton. JJK Now you are showing your age.... lol... Quote Link to comment Share on other sites More sharing options...
billybob Posted May 22, 2013 Share Posted May 22, 2013 Future Astronauts Could Print Food, to go with their music: http://www.voanews.com/content/future-astronauts-could-print-food/1666201.html Quote Link to comment Share on other sites More sharing options...
Boxx Posted May 22, 2013 Author Share Posted May 22, 2013 Future Astronauts Could Print Food, to go with their music: http://www.voanews.com/content/future-astronauts-could-print-food/1666201.html or beverage.... [D] Quote Link to comment Share on other sites More sharing options...
billybob Posted May 22, 2013 Share Posted May 22, 2013 Future Astronauts Could Print Food, to go with their music: http://www.voanews.com/content/future-astronauts-could-print-food/1666201.html or beverage.... Yes, I guess they could recycle their body fluids...yum to rum. Just add cleargrain 180proof alcohol to needed proof. Wait who is flying loaded? Quote Link to comment Share on other sites More sharing options...
Ray_pierrewit Posted April 2, 2015 Share Posted April 2, 2015 I thought I'd resurrect this old thread as it is something I've been thinking alot about. Since it was started a few years ago, I know of two new hi end audio products that are 3D printed. First, the Mr.Speakers Alpha Dog headphones, based on the venerable Fostex T50RP drivers. They've received great reviews and I'm pretty certain cannot be made anyother way than 3D printing. The other is a VPI 3D printed tonearm, printed with some sort of epoxy. It still is really pricey for now, but one day this might be common in households. Can you imagine printing custom horns at home? With all the know how and experience on this forum, some sort of open sourced 3D printed horn could be an amazing project! Quote Link to comment Share on other sites More sharing options...
Chris A Posted April 2, 2015 Share Posted April 2, 2015 (edited) Can you imagine printing custom horns at home? With all the know how and experience on this forum, some sort of open sourced 3D printed horn could be an amazing project! Yes, I can. However, the technology isn't yet there for horns of any size with polar control lower than about 2 kHz--especially when you consider cost. When that size gets to be sufficient to control polars down to 500 Hz (and in non-waxy printed material that can be effectively bonded to stiffening material--like fiberglass--to minimize horn hall flexing), then 3D printing will be useful and perhaps revolutionary for horn-loaded loudspeakers. Chris Edited April 2, 2015 by Chris A Quote Link to comment Share on other sites More sharing options...
DaveWJr Posted April 2, 2015 Share Posted April 2, 2015 In case you guys are wondering, we use stereo lithography (SLA) to 3D print horns, phase plugs, ports & flares, headphone housings, various fixtures, and even complete speaker assemblies. As an example, there is a full size 3D printed sound bar sitting right behind me at the moment, and a SLA'd bluetooth speaker (a prototype GiG) on my desk. The technology is invaluable for us, and we've been using it for many, many years now. 2 Quote Link to comment Share on other sites More sharing options...
Chris A Posted April 2, 2015 Share Posted April 2, 2015 (edited) We used SLA in defense (missile inlets/exhausts, missile structures, and UAV turbine engine inlets and exit nozzles, full body prototypes) since the mid-80s -70s but it's never been more than a prototyping tool, as the costs, lack of mechanical stiffness and strength, and size limitations of thicker sections are prohibitive. The newer 3-D printing technologies (going back perhaps 10-15 years or so) were brought into the marketplace because of cost and the promise of higher speeds. Those limitations (cost, size) are still there. If you are designing horns that are for headphones or are otherwise severely undersized for home hi-fi (like soundbars) to control their polars down to some more useful frequency than 1-2 kHz then I guess that 3-D printing can be useful for horn prototyping. Personally, I'd make a mold from an assembly of 3-D printed parts and hand lay-up in fiberglass - not thermoplastics, since thermoplastics really aren't very rigid unless in very thick sections. You can also hog out horns from aluminum using a CNC mil/machining center, but that's also a bit more expensive than hand lay-up. YMMV. Chris Edited April 2, 2015 by Chris A Quote Link to comment Share on other sites More sharing options...
DaveWJr Posted April 3, 2015 Share Posted April 3, 2015 (edited) Whoever said you had to build the whole horn out of one piece? Why not break large items up into small parts, UV bond them together, and then sand, bondo and paint until smooth? We long ago figured out how to exploit the limitations of our machines (yes, there are 2) to grow pretty much whatever we want or need. Edited April 3, 2015 by DaveWJr Quote Link to comment Share on other sites More sharing options...
Marvel Posted April 3, 2015 Share Posted April 3, 2015 Our college computer club got this recently. You can only do a 6x6x6 piece at one time, but it's pretty cool. The home schooled son of on of the CS profs has been working with it and it's pretty amazing. I think he printed some pieces from a Blender file and from SketchUp. http://cubify.com/en/cube Bruce Quote Link to comment Share on other sites More sharing options...
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