On Wed, 2012-06-27 at 12:17 -0400, John Stewart wrote: > as I have a perfectly good CNC mill sitting around…
The fundamental problem with a RepStrap made from a typical milling machine is speed: my rather customized Thing-O-Matic prints reasonably well at 30 mm/s and makes rapid motions at 250 mm/s. That's about 70 in/min printing and 600 in/min moving, which seems rather peppy for most affordable milling machines. At those speeds, an "interesting" object requires upwards of a half hour to print, with the largest one taking (IIRC) four hours. Tuned Ultimakers seem to have the fastest printing these days, somewhere upwards of 150 mm/s; call it 350 in/min. You can scale the total time pretty much linearly by the printing speed, because that's what it spends most of its time doing. My Sherline, admittedly a slug, tops out at 24 in/min = 10 mm/s, so larger objects would require a bit over three consecutive shifts. That's why you need a purpose-built 3D printer... -- Ed http://softsolder.com ------------------------------------------------------------------------------ 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
