On Thursday 27 June 2013 16:15:48 Charles Buckley did opine: > And some further patents: > > https://www.google.com/?tbm=pts#tbm=pts&tbm=pts&q=ininventor:%22Kornelis > +Frits+Feenstra%22&bav=on.2,or.r_qf.&fp=5b260c5b98cf1da2&biw=1527&bih=84 > 0
Busy fellow, that Feenstra was. I looked at the first one with a dozen hits, but none of it passes the "not obvious" test IMNSHO. But it would of course keep a law firm in business for 5 years getting it set aside. > On Thu, Jun 27, 2013 at 1:01 PM, Gene Heskett <[email protected]> wrote: > > On Thursday 27 June 2013 14:59:37 Charles Buckley did opine: > > > Well, on January 28th, 2014 the next generation of stereolithography > > > patents expire. That will increase the resolution a ridiculous > > > amount. > > > > Interesting, until some troll crawls out of the swamp. Are there any > > other gotchas that will fall through to, to bite the unwary? > > > > > Linuxcnc is a much more adaptable baseline for any of these > > > machines. I would expect to see a lot of UI changes and movement > > > with it. > > > > > > On Thu, Jun 27, 2013 at 10:49 AM, Bari <[email protected]> wrote: > > > > I agree with you. When the GGG (Glorified Glue Gun) fad started a > > > > few years ago many of the maker folk looked at Linuxcnc since it > > > > had been used to control multi-axis machines for over a decade. > > > > Some of them felt that it was too complicated and expensive to > > > > control their GGG made mostly of threaded rods, nuts and low > > > > resolution PLA printed parts. They then decided to just use an > > > > Arduino and make some custom IO stepper boards to control the > > > > 3-axis Cartesian stage and glue gun/extrude and write all the > > > > software from scratch. The printers still needed a PC for the > > > > user interface, but I guess you weren't supposed to notice that. > > > > > > > > Later they decided to move from Arduino to all-in-one 120MHhz ARM > > > > cortex M3/4 boards and write all new libraries for the new > > > > architecture. The new all-in-one boards sell for $120-200 and > > > > combine the micro with stepper drivers, GPIO and mosfet outputs. > > > > A PC is still required for the UI but they can run stand alone > > > > with the G-code stored on an SD-Card. > > > > > > > > Now TI has released a $45 BeagleBone Black with a 1GHz ARM Cortex > > > > A8 that can host the machine control and suddenly there is > > > > interest in Linuxcnc again. The UI can be directly off the GPU or > > > > over he network. The Beaglebone Black still needs some expansion > > > > IO to drive the steppers and extruder but the BOM is <$30. > > > > > > > > The GGG's only use one or two nozzles to deposit material so the > > > > process is very slow and they have difficulty with producing > > > > features under 200um. It's become popular since the original > > > > patents expired a few years ago and you can build your own > > > > printer for only a few hundred dollars. > > > > > > > > The reasons I have heard from the "maker guys" for not aspiring to > > > > other additive manufacturing technologies have been the complexity > > > > and the high costs involved for DIY. There are a few DIY projects > > > > that use SLA with DLP (B9) or laser (SLAMPS) but they have chosen > > > > slow methods mostly due to the problems with "It's the patents > > > > stupid!" or just ignorance of the technology and SLS, Inkjet and > > > > micronozzle DIY is practically non-existent. > > > > > > > > On 06/27/2013 10:29 AM, Dave wrote: > > > > > I have been randomly watching the 3D printer efforts from the > > > > > sidelines and for the most part I have not been impressed at > > > > > all. > > > > > > > > > > I think you are right ... they are way, way behind. To many, > > > > > it seems that reinventing the wheel is how they learn but at > > > > > the expense of making any meaningful > > > > > progress. > > > > > > > > > > >>Loading an SD card works because it > > > > > > > > > > is pretty bullet-proof and easy to manage as is just pressing a > > > > > button.<< > > > > > > > > > > I guess that is fine if you want to duplicate a design that > > > > > someone else > > > > > > > > has already worked out on a "standard" printer. > > > > > > > > > However I would hope that some of the "maker guys" would have > > > > > more > > > > > > > > ambitious aspirations! :-) > > > > > > > > > Dave Cole Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> Sears has everything. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
