2011/6/12 Colin K <cwk....@gmail.com>: > On Sat, Jun 11, 2011 at 5:06 PM, Edward Bernard <yankeelena2...@yahoo.com> > wrote: > >> >> Sounds very interesting, Jon. I've looked at extrusion based RPS and have >> not >> been impressed with the results. >> > > Edward, > > Care to share any of your thoughts on this? I'm curious to see what aspects > of it you've found lacking. > > I felt the same way until I recently saw a RepRap and some parts it had > made. The parts were strong and the machine seems to be getting a lot more > reliable. The part quality and finish are not what you get off a mill, and > it is not super fast, but the CAM is much simpler and you can make very > complex geometries without multiple setups or fixtures. As an example, there > are guys selling RepRap parts kits on eBay for ~$100 like this: > > http://cgi.ebay.com/SAE-Prusa-Reprap-Mendel-w-PLA-Bushings-3d-printer-/190543881396?pt=LH_DefaultDomain_0&hash=item2c5d4ce4b4 > > My understanding is that represents 20-30 hours of machine run time, most of > it unattended. The existence of a decent number of vendors of these says > something to me about multiple people getting these machines working well. I > doubt I could come anywhere close to that with my mill, and a lot of the > parts would need to be redesigned. The gears alone add a ton of > complexity. The finish is definitely imperfect and has a striated/layered > look and feel, and there are little blobs that sometimes stick out that can > be knocked off with a file/sandpaper. Powder-bed systems definitely give a > much prettier finish but the parts have very little strength. Electron-beam > systems give strength and beauty but we're talking > price-of-a-German-sportscar stuff now. And all of the commercial systems > follow the printer ink model in terms of feedstock.
I think of reprap too. Look at this video http://www.youtube.com/watch?v=snOErpOP5Xk Looks very nice, but not open-source project, author intends to sell some parts. His blog http://3dhomemade.blogspot.com/ Andrew ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
