> On Wednesday 27 June 2012 14:04:15 John Stewart did opine: > > >> Hi all; >> >> Noted lots of interest in 3D printing, and have saved the emails. >> >> Michael Joyce just completed a kickstarter project for a 3D printer, he got $510,000 in one month. He now has to deliver about 180 systems. This is the b9creator project. A lot of discussion of this type machine has been going on on the Yahoo group : diy_3d_printing_and_fabricat...@yahoogroups.com
The basic idea is a vat of photosensitive resin and a build platform that raises above the vat. A DLP-type computer projector shines through the bottom of the vat to expose a layer at a time, which is made planar by the vat bottom. A guy in Spain is providing relatively inexpensive resins. Software has been modified from the standard reprap software preview mode. The last problems that Michael solved was preventing the model from sticking to the vat bottom (a clear silicone similar to RTV was used) and preventing a suction cup effect (his scheme is to have a plateau of the silicone for the build area and slide the model sideways to a lower area of the floor to prevent suction.) The advantage of this machine is it exposes an entire layer in parallel, and has about an 8-10 second cycle time, regardless of layer complexity. Pixels of 50 - 100 um are typical, and layer thicknesses of 20 - 50 um are what they are using, I think. Pretty much all the details have been hashed out on that group. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users