Hi Jon i want to be sure about how any plastic introduce- ejected from head. Is this continues flow or this is drop by drop of plastic material? i think that when build the border of work-part where accuracy is needed to be drop of material and inside work-part possible continues flow to do fast.
Size of the each drop will determine accuracy of whole system. i think size of drop should be around 0.001-0.005" or bigger. When accuracy of drop be between 0.001-0.005" there may not need for –“the wiper and other surface leveling schemes are covered by patents, and these may have” Have a small drop of plastic size of 0.001-0.005” can help with curing when used with heated wax. Plastic is important material but also many wax model used to make casting for commercial application. Also, servo system that controls ejection of plastic/wax material should be same as those that controls X Y Z motion of the head. That will make setting of machine much robust and less experimental. I think EMC2 can be good in this. Thanks Aram >> 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 ------------------------------------------------------------------------------ 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
