| 00:12.18 | *** join/#qi-hardware compcube (~compcube@pdpc/supporter/student/compcube) |
| 00:49.29 | *** join/#qi-hardware rejon (~rejon@jp.fabricatorz.com) |
| 00:50.30 | *** join/#qi-hardware jluis (~jluis@2001:5c0:1000:a::577) |
| 02:02.13 | *** join/#qi-hardware nikescar (~nikescar@114.199.131.108) |
| 02:38.36 | pabs3 | http://lwn.net/Articles/518764/ |
| 03:03.27 | *** join/#qi-hardware DocScrutinizer06 (~HaleBopp@openmoko/engineers/joerg) |
| 03:13.40 | wpwrak | pabs3: makerbot's fused deposit modeling systems are rapidly becoming obsolete. technology is moving elsewhere, e.g., to stereolithography / solid imaging |
| 03:16.11 | wpwrak | faster and more precise. still a but pricy with those projectors, but people are beginning to figure out how to use lasers. so prices should come down. one obstacle are the secret resin formulas. but the sooner or later someone will figure out how to make generic resins, too. |
| 03:22.48 | wpwrak | here's an example: http://b9creator.com/ |
| 03:32.12 | *** join/#qi-hardware jluis (~jluis@2001:5c0:1000:a::87f) |
| 03:35.26 | wpwrak | here's another one: http://3dhomemade.blogspot.de/ quite closed, but has nice videos, specially this one: http://www.youtube.com/watch?v=IPmP0u1HuUM |
| 03:51.35 | roh | wpwrak: just wait... stl iss still expensive by a factor of 3-10 compared to fdm |
| 03:52.18 | roh | simply because of the special chemicals.. and their availability and colors still suck. we'll see |
| 03:52.36 | roh | wpwrak: you know about form1? |
| 03:54.51 | roh | basically a stl attempt with laser as lightsource |
| 03:55.17 | pabs3 | wpwrak: do you have an lwn account to reply there? |
| 03:56.15 | roh | wpwrak: they have support from the founder of solidworks and the mit, so there is a chance ;) |
| 03:56.21 | roh | not for opensource tho |
| 04:49.54 | *** join/#qi-hardware jluis (~jluis@2001:5c0:1000:a::87f) |
| 05:15.49 | *** join/#qi-hardware rodgort (~rodgort@69.164.210.242) |
| 06:18.13 | *** join/#qi-hardware cladamw (~adamwang@host-174.163-235-182.cable.dynamic.kbtelecom.net) |
| 06:47.30 | *** join/#qi-hardware jekhor (~jek@46.53.195.142) |
| 07:01.09 | larsc | viric: It was actually mth who sent the patch upstream |
| 07:03.45 | *** join/#qi-hardware kristoffer (~kristoffe@c-b6dce555.010-30-6c6b7012.cust.bredbandsbolaget.se) |
| 08:06.32 | *** join/#qi-hardware rejon (~rejon@jp.fabricatorz.com) |
| 08:51.16 | *** join/#qi-hardware rejon (~rejon@jp.fabricatorz.com) |
| 09:02.27 | *** join/#qi-hardware rejon (~rejon@jp.fabricatorz.com) |
| 09:09.24 | *** join/#qi-hardware viric (~viric@unaffiliated/viric) |
| 09:43.16 | *** join/#qi-hardware he2 (~he2@p579096ED.dip.t-dialin.net) |
| 10:13.43 | wpwrak | pabs3: no, no lwn account |
| 10:14.46 | wpwrak | roh: yes, laser sounds much better than projector. i didn't mention them because they're also among the less open ones. |
| 10:15.23 | wpwrak | i'd also expect lasers to make the chemicals easier. more energy -> easier formula |
| 10:17.21 | *** join/#qi-hardware he2 (~he2@p579096ED.dip.t-dialin.net) |
| 10:17.25 | roh | wpwrak: we'll see... for now its very limited (colors) |
| 10:17.41 | roh | but i must say that fdm has come a long way now. |
| 10:18.27 | roh | maybe we can't do small flimsy noses and clamps like in usual plastic cases, but there are different, more stable mechanics one can use |
| 10:20.00 | roh | http://raumfahrtagentur.soup.io/ |
| 10:25.31 | roh | we are at 3 printers now atm. one of which is in a suitcase and portable. |
| 11:31.41 | *** join/#qi-hardware he2 (~he2@91-67-2-110-dynip.superkabel.de) |
| 12:23.42 | *** join/#qi-hardware jekhor (~jek@46.53.195.142) |
| 12:38.30 | *** join/#qi-hardware guanucoluis (~luis@200.127.180.65) |
| 12:38.44 | *** join/#qi-hardware dandon_ (~dandon@88.151.75.100) |
| 12:47.36 | *** join/#qi-hardware urandom__ (~user@p54B0E027.dip.t-dialin.net) |
| 13:29.37 | *** join/#qi-hardware Freemor (~Freemor@ec2-174-129-226-140.compute-1.amazonaws.com) |
| 13:41.27 | wpwrak | roh: popfab looks nice :) i think fdm may eventually develop into something similar like ink printing, which will give you good resolution. but you'll have all the problems of ink printers, particularly proprietary ink that's intimately linked with the delivery system. stl doesn't have this inherent dependency, which should make it much easier to make generic "ink". |
| 13:57.26 | *** join/#qi-hardware GNUtoo-desktop (~GNUtoo@host143-91-dynamic.21-79-r.retail.telecomitalia.it) |
| 14:51.31 | roh | wpwrak: well.. on fdm there are no inkjet-like problems anymore |
| 14:52.13 | roh | the parts are known and documented and the material is nothing magic and expensive. abs and pla are cheaper than anybody who is able to use a printer by far (or the cad/cam part) |
| 14:56.27 | *** join/#qi-hardware pcercuei (~paul@190.162.199.66) |
| 14:56.44 | roh | meh. now i even did a modular version of my muxing board and still can't afford to go on. sucks |
| 14:57.33 | wpwrak | yeah, fdm has these advantages. but it's low-resolution and is doesn't scale too well, being a one-dimensional method to solve 2-3 dimensional problems |
| 14:58.10 | roh | its ok for functional prototyping. for production its way to expensive, same as stl |
| 14:59.05 | wpwrak | fdm also needs a reasonably strong 3-axis system. not quite a mill, but similar. stl is much simpler in that regard. so i'd expect hw prices to come down quite a bit. |
| 14:59.24 | roh | the mechanics funnily isnt the issue |
| 14:59.25 | wpwrak | oh, mass production is a different issue :) |
| 14:59.40 | roh | it seems software has way more influence than one would think |
| 14:59.48 | wpwrak | heh, that too :) |
| 15:00.25 | roh | basically the progress in the last 2 years were mostly software. the mechanics were only refining to more reliable versions, no real new concepts |
| 15:01.16 | roh | also not really needed. stratasys also does abs-fdm and there is still a bit of stuff to optimize |
| 15:02.00 | roh | we just updated the firmware on the arduino of one of our machines last night and that helped a lot to reduce resonances and vibrations |
| 15:03.18 | wpwrak | see. stl only has to worry about such things in one dimension. and there are only one-way movements there. very simple. |
| 15:03.54 | roh | heh. one would think. i bet there are also weird pros and cons |
| 15:04.30 | roh | i could imagine that on a tilting boat stl would be at a disadvantage to fdm (which works impressivly well up to 45deg) |
| 15:04.39 | wpwrak | i think one should try to build an stl printer using a blue-ray burner. relatively cheap mass-produced hardware. and the beam has a high energy (high frequency), which should help a lot with the photochemicals |
| 15:04.43 | roh | given you have oversized mechanics like we do |
| 15:05.16 | wpwrak | hmm. not sure. the active area i stl is still 2D, just at the bottom of the tank |
| 15:05.34 | roh | the form1 machine had quite some complex mechanics for the laser.. galvos i guess... not sure how that works |
| 15:05.38 | wpwrak | if you want, you can close the tank. then you could even reverse the thing ;-) |
| 15:06.12 | wpwrak | that's typical for designs coming from academia. they're used to "first principles" instruments |
| 15:06.19 | wpwrak | (which makes sense) |
| 15:06.36 | wpwrak | if you goal is "cheap", things change |
| 15:07.17 | roh | true. i guess on the long run dlp could be cheaper (still with limited resolution) |
| 15:07.32 | roh | simply because one doesnt need expensive galvos for the laser |
| 15:07.40 | roh | only one simple focus plane and done |
| 15:23.56 | wpwrak | dlp ? you mean projectors ? |
| 15:27.29 | wpwrak | my ideas go in the direction of combining a blue-ray drive with a mirror. use the spindle to rotate the mirror, basically like in a laser printer. use the radial drive to move the laser and reuse the laser. that should give some 2D coverage, one axis by moving the radial drive, the other by selecting the time according to the position of the mirror (needs some photo detector for calibration) |
| 15:29.09 | wpwrak | the problems would be mainly the shaping of the mirror and the shaping of the beam. while maintaining a sufficient energy level for the photochemical reaction. |
| 15:37.42 | roh | quite some mechanical details to solve |
| 15:40.04 | qi-bot | [commit] Paul Cercueil: menu.cpp: Don't use stat() to know if a FS entry is a directory (master) http://qi-hw.com/p/gmenu2x/4070644 |
| 15:42.32 | larsc | funny we just yesterday had a discussion if there is a better way to ignore subdirectories when walking a directory using readdir() than using stat() |
| 15:45.33 | pcercuei | I don't know |
| 15:46.24 | pcercuei | if you care about re-entrancy, readdir() is quite a pain to use |
| 15:46.34 | pcercuei | well readdir_r() |
| 15:47.20 | pcercuei | ah sorry |
| 15:47.22 | pcercuei | read wrong |
| 16:01.39 | pcercuei | when I do C++ string = const char * |
| 16:01.44 | pcercuei | is the string duplicated? |
| 16:03.24 | lindi- | pcercuei: well the docs say "initialized to a copy of .."? |
| 16:06.03 | pcercuei | lindi-: ok, thanks |
| 16:12.50 | *** join/#qi-hardware emeb (~ericb@ip72-201-79-123.ph.ph.cox.net) |
| 16:20.48 | *** join/#qi-hardware guanucoluis (~luis@200.127.180.65) |
| 16:43.28 | mth | pcercuei: accepting only DT_REG means that symlinks are no longer accepted? |
| 16:44.04 | larsc | the check is or != DR_DIR |
| 16:44.07 | larsc | is for |
| 16:44.59 | pcercuei | mth: correct |
| 16:45.07 | pcercuei | but that was not introduced on purpose |
| 16:46.02 | pcercuei | larsc: at the bottom there's a check for != DT_REG |
| 16:46.10 | pcercuei | as well |
| 16:46.19 | larsc | ah |
| 16:46.59 | *** join/#qi-hardware DocScrutinizer06 (~HaleBopp@openmoko/engineers/joerg) |
| 17:22.04 | *** join/#qi-hardware he2 (~he2@91-67-2-110-dynip.superkabel.de) |
| 17:25.53 | *** join/#qi-hardware heberth (~heberth@186.115.105.27) |
| 18:31.06 | *** join/#qi-hardware freakazoid0223 (~matt@pool-71-246-26-142.phlapa.fios.verizon.net) |
| 18:58.12 | lekernel | (stereolithography) now it gets interesting |
| 19:02.09 | *** join/#qi-hardware lekernel_ (~lekernel@g226059047.adsl.alicedsl.de) |
| 19:02.31 | *** part/#qi-hardware freemor (~Freemor@ec2-174-129-226-140.compute-1.amazonaws.com) |
| 19:13.56 | viric | mth: thanks to you too then :) |
| 19:16.38 | *** join/#qi-hardware heberth (~heberth@190.6.162.167) |
| 19:50.23 | *** join/#qi-hardware zedstar_ (~john@zedstar.com) |
| 19:55.59 | *** join/#qi-hardware bartbes_ (bartbes@love/developer/bartbes) |
| 19:56.00 | *** join/#qi-hardware kristianpaul (~kristianp@unaffiliated/kristianpaul) |
| 19:56.12 | *** join/#qi-hardware antoniodariush (~antonio@host-92-2-90-240.as43234.net) |
| 19:58.42 | *** join/#qi-hardware lekernel_ (~lekernel@199.254.238.243) |
| 20:01.03 | *** join/#qi-hardware bartbes_ (bartbes@love/developer/bartbes) |
| 20:01.03 | *** join/#qi-hardware kristianpaul (~kristianp@unaffiliated/kristianpaul) |
| 20:05.46 | *** join/#qi-hardware zedstar (~john@fsf/member/zedstar) |
| 20:10.19 | *** join/#qi-hardware wolfspra1l (~wolfsprau@222.129.23.76) |
| 20:54.48 | *** join/#qi-hardware jluis (~jluis@143.Red-83-37-102.dynamicIP.rima-tde.net) |
| 20:55.09 | *** join/#qi-hardware aisa (~a@c-68-35-162-196.hsd1.nm.comcast.net) |
| 21:05.26 | *** join/#qi-hardware lekernel_ (~lekernel@g226059047.adsl.alicedsl.de) |