On Wed, 30 May 2012 14:44:38 -0700 rob c <[email protected]> wrote: > > Roland, in your view do you see EMC being a CAM software? > It actually isn't. > Also you don't necessarily produce better parts using a 2.5D mill, > remember a 3D printer is a Milling machine, the only thing different > being the spindle is now a deposition head of some form. Really you > will only get the accuracy you program for, remember you can rough > out a part. And what does a person do with the printed part you ask? > Well many companies use them to construct conceptual parts, this is > called a prototype. hobbyists use the printer to replace broken > plastic parts, or to make enclosures, maybe even just design a > prototype for themselves. You are also one of the few people I hear > complain about the resolution, last i checked .1 mm is pretty darn > fine, I bet you can't carve to that detail. Roland, unless you have > used a 3D printer that extrudes plastic or metal, you really > shouldn't knock it. > > > From: [email protected] > > Date: Wed, 30 May 2012 19:29:07 +0200 > > To: [email protected] > > Subject: [Emc-users] OT: 3D Printer Mods? > > > > On 30 May 2012 19:06, Joseph Chiu <[email protected]> wrote: > > > > > Having a ToM 3D printer, and having done hobbyist CNC work with a > > > 3-axis mill, I have to say that FDM 3D printing lets me try out a > > > number of ideas that are much harder or impossible to cut with a > > > 3-axis CNC. The most obvious examples are cutting "figurines", > > > where there are features that would not be reachable by a cutter > > > constrained to a single axis. The other "advantage" is the > > > ability to make pieces that are "hollowed out" (done in FDM > > > process to minimize material usage) -- which has a nice side > > > effect of making things lighter (by adjusting the "fill" rate, > > > you can determine how much material rigidity you give up). > > > > > > With newer printers able to get .1 mm or smaller layer heights, > > > the surface quality issues are much less objectionable, too. > > > > > > Obviously, for "2.5D" work, milling parts out of sheets yield a > > > much nicer result. > > > > > > Finally, the one last nicety of 3D printers is that you normally > > > don't have to setup your job as you do with machining processes. > > > You just "print" onto an empty print bed, and come back to a > > > finished part. > > > > > > > > The thing is, what do you do with these parts? While I fully > > appreciate the value of the learning, especially for children, > > people using EMC are perforce versed in CNC milling. > > > > Also, filament printing is not to confused with the valuable > > printing of sinterable metals or other resinoid methods. I'm > > talking specifically about the filament stuff. True, it looks > > something like the cad drawing, but then what? Maybe for me, the > > penny hasn't dropped yet. > > > > Regards > > Roland > > > > > > > > > > > > > > > On Wed, May 30, 2012 at 12:51 AM, Roland Jollivet > > > <[email protected]> wrote: > > > > Hi Alex > > > > > > > > Do you mind saying what you are printing, and if you feel the > > > > printing > > > is a > > > > worthwhile exercise? I've been looking at different printers > > > > for months, but they only seem to be able to produce junk. > > > > Cnc'ing it out of a block > > > of > > > > plastic looks far more effective. > > > > > > > > Regards > > > > Roland > > > > > > > > > > > > On 29 May 2012 18:22, Alex Hunt <[email protected]> wrote: > > > > > > > >> Hi Jeshua, > > > >> > > > >> I mounted a "Wade" type extruder to my gantry router and have > > > >> been 3D printing with LinuxCNC for about 6 months now. The > > > >> extruder thermal control is managed by RepRap firmware on an > > > >> Arduino. I have to manually set the temperature of the > > > >> extruder before printing, but it works. I > > > have > > > >> a Mesa 5i20 card for control with 2M542 motor drivers, but the > > > >> extruder driver is a simple single chip stepper driver. > > > >> > > > >> My intent was to close the thermal loop with a thermocouple to > > > >> PWM > > > circuit, > > > >> but I'm not there yet. Sending serial port commands from > > > >> LinuxCNC would automate my current setup better, so please let > > > >> me know if you make any progress on that. > > > >> > > > >> When you get your hardware ready to go, I might be able to > > > >> help you > > > smooth > > > >> over some of the speed-bumps getting started. > > > >> > > > >> Regards, > > > >> Alex Hunt > > > >> > > > >> On Tue, May 29, 2012 at 12:00 AM, Jeshua Lacock > > > >> <[email protected]> > > > wrote: > > > >> > > > >> > > > > >> > Greetings all, > > > >> > > > > >> > I have been dreaming of making a removable plastic extruder > > > >> > nozzle > > > for my > > > >> > machine. It would turn it into a *huge* 3D printer. > > > >> > > > > >> > So I read this page with great interest: > > > >> > > > > >> > http://www.thingiverse.com/thing:5233 > > > >> > > > > >> > Is it possible to make those changes to LinuxCNC? In other > > > >> > words, can LinuxCNC currently command a serial port using > > > >> > those additional M > > > words? > > > >> > > > > >> > If not, I would be willing to write some code and commit it. > > > >> > Some > > > advice > > > >> > to help me get started would be extremely helpful as I have > > > >> > never > > > looked > > > >> at > > > >> > the branch. > > > >> > > > > >> > > > > >> > Thanks, > > > >> > I'm not pointing fingers but it would be instructive for a reasonable percentage of the people on this list to make ten to 30 identical parts and then measure them and calculate standard deviation. You might be shocked or you might be pleased. It just depends on what you've been smoking. ;-)
Rep-rap nicely done is cute stuff. It doesn't do much for me but I'm not throwing stones at the people that like/do it. If you can't get strengths of 150 to 200 ksi I'm not too interested. It simply relates to my applications. Prototypes I can machine in Al, wood, etc in much less time than I can rep-rap. Besides I need geometry I can machine in real steel. If other modeling fits other people and meets their needs that is not only just fine but great. Sorry for the rant, but it is late in the day I just couldn't resist. Dave > > > > > ------------------------------------------------------------------------------ > > 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 [email protected] > > 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
