Jeshua Lacock wrote: > > Yes, I am familiar with the project and DLP printing technology. > > I did not know about the patent work-around however. > Yes, the guys on that group, especially Michael Joyce did a lot of work to deconstruct what the patents did, and didn't cover, so he could be sure to not infringe. > > True, but the resin is much less expensive from the b9 project. The b9 resin > is closer to $100 per liter, but still. > Well, a 75 mm cube is 420 ccs, and your vat probably ends up being bigger than that. The resin probably deteriorates by being exposed to air for a long time. Also, the wiper and other surface leveling schemes are covered by patents, and these may have covered all the logical systems, as well as making the printer a lot more complicated.
> Not to mention no need for support material. > Not true. In fact, that is about the only drawback to the DLP system, is there is no way to make a model with a different (soluble) support material. There are certainly some models that have separable parts or gaps in the parts that could use a support material. Proper layout of the build can sometimes overcome this by building at an angle. The other drawback is the fixed number of pixels on the projector. A guy in England is working on using the spinning mirror from a laser printer, a powerful blue diode laser and a carriage to scan the raster down the vat to make a machine that has high resolution over a larger build area. His early tests look quite promising. But, he will have to develop custom electronics, probably using an FPGA, to modulate the laser to produce the raster. (It is possible to gut a laser printer and fudge the myriad sensor inputs, but it might be a lot easier to just start from scratch.) Jon 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
