(Machine-by SebastienBailard - Schwarzes Brett
You may want to consider picking up a used or new proxxon mill and using that as your 3 axis positioning system. This would be quick, and not very expensive. There are other brands of small milling machines, like Sherline, around, but I'm not sure what is available in Europe besides proxxon. I suspect most of the information on cnc-conversion of proxxon mills is in written in German. Even cheby SebastienBailard - General
According to this post: the BMC from Bill Struve (via Rio Grande) "had about a 20% shrinkage rate and would continue to shrink with subsequent firings." Apparently it is straightforward to use the activated charcoal method with at least one of the homebrew bronze clay recipes: I find that reassuring as activated charcoal or graphite are more straightforward to deal with than nitrogen or carboby SebastienBailard - Casting and Moldmaking Working Group
Note: This thread should probably be merged with the Bronze Clay thread in the Fabrication forum: Here's a link to a sculptors forum where they've come up with two different recipes for bronze clay. There's a fair bit of information there:by SebastienBailard - Casting and Moldmaking Working Group
BDolge, I've merged your thread with an older post on the subject. Read the sculpture.net stuff, it is fascinating.by SebastienBailard - Casting and Moldmaking Working Group
I don't know if they have 3D printers, RepRap or otherwise, but they should have a small cnc router and a waterjet cutter or a laser cutter. That should be all you need to build a RepRap. (Aside from a little bit of work with a lathe.)by SebastienBailard - Dutch User Group - Archive
Stuff on my radar: The bbc went after a knitter, "Mazzmatazz", for posting a knitting pattern for a Dr. Who character. After sending off the initial cease-and-desist, "The BBC have agreed to meet with Mazz and turn her knitted designs into, at the very least, a limited edition of exclusive promotional products." According to the Times. I don't expect most instances that start with a corporby SebastienBailard - General
Actually, one way you could try to build parts of the a mold would be to RepRap a sort of scaffolding*, and then glue down a sheet of mylar or other material for the top surface. You now have a mold. Well, half of the mold. Variation: Coat the mylar with release agent, then build up a layer of fiberglass or some such. Then pop off the fiberglass and use this for your mold. There's a tricky bby SebastienBailard - Let's design something! (I've got an idea ...)
Making a mold for a 250 cm airfoil building it by extruding thermoplastic traditional RepRap style would take a very long time. The two quicker ways to do it would be by CNC-routing the mold out of foam sheets, or by building up foam, and then CNC-routing it, as in: But if we've built a CNC router of that scale, we might as well machine the foam cores directly, maybe. I personally wonder howby SebastienBailard - Let's design something! (I've got an idea ...)
It's about USD$1K to RP the parts, using a non-RepRap. (I think that's the right number.) Using plastic in plaster molds is much cheaper. Note that if you can get your hands on a cheap small mill or router, that may be the way to go. For example, here's an Israeli dealer of the Sherline brand tabletop mill:by SebastienBailard - Reprappers
FabLab Den Haag: Amsterdam:by SebastienBailard - Dutch User Group - Archive
This may be of interest. It's in Elyria, 191 miles away, as the crow drives. Lorain County Community College Fab Lab:by SebastienBailard - Ohio, Dayton RepRap User Group
This is an interesting project: using wind-up (+solar) radios for education and news in developing countries. "People in rural areas, especially women and children, have limited access to radios. Lifeline radios ensure sustainability of access. Providing the radios for group or community listening is necessary to ensure important programming will be regularly heard. Lifeline radios are self-poby SebastienBailard - General
Apparently, Century College now has a fab lab. I don't know much more about it:by SebastienBailard - Minnesota Twin Cities RepRap User Group
It looks as though there is a Fab Lab starting in San Diego. For Angelenos, Sand Diego is just a bit further away then the normal commute to work, :p , so this may be of interest, if you want to use a CNC mill, 3D printer, or laser cutter to build a RepRap or RepStrap.by SebastienBailard - California, Los Angeles RUG
> Hi Sebastien, > > I'm Adam Novak > contact: +36707044853 > > Would you please create a forum for Hungary? > > Thanks, > Adam Done. Good luck. I normally spend a few minutes digging up local art geek and robot hobbyists. Unforturnatly Budapest's dorkbot is hibernating: and I can't find any active robotics clubs, although I suspect I'd have more luck if I could reaby SebastienBailard - Hungary RepRap User Group
I was going to, but pulled out at the last minute when I realized my machine wasn't ready. I'll be attending as a visitor on Saturday.by SebastienBailard - General
Forum created. You may want to talk to these guys to see if anyone is interested: *dorkbot303 Colorado *Denver Area Robotics Club (DARC)by SebastienBailard - Colorado, Denver RepRap User Group
Here's an interesting development; Lockheed Martin attempted to crack down on distribution of 3D models of the B-24 bomber, by claiming such distribution infringes on Lockheed Martin's trademark on the _name_ "B-24". Luckily, the EFF is on the case. More info: Note: Building 1-1 scale bombers is probably against the spirit of the RepRap project.by SebastienBailard - General
If we are lucky, recycling will be as simple as a working granule extruder* and a blender: *an extruder that uses granules as input rather than filament.by SebastienBailard - General
Done. Good luck getting the machine working, I know how it's like.by SebastienBailard - New Zealand RepRap User Group
Forum created. You may want to ping this local robotics group. While they currently appear dormant, there may be some interest. And apparently there is a local dorkbot group starting up: Good luck, -Sebastienby SebastienBailard - Australia, Brisbane RepRap User Group
Meanwhile: Here is a video of a little mobile drumming robot: Homepage: And here is a video of a high-speed pick-and-place robot.by SebastienBailard - General
Ooh, a pasta machine. Good call. Are there any tricks to it, like oiling the rollers, or is it straightforward?by SebastienBailard - Plastic Extruder Working Group
It's pretty much spam, yes. I've deleted all but one of the postings, and moved that into the "for sale" forum. I have slight misgivings about not deleting that one. I'd consider ordering my motors from China if I wanted to purchase a case of them, but I don't have a breeding population of RepRaps yet.by SebastienBailard - Administration, Announcements, Policy
Are people interested in doing the Maker Faire Bay Area, May 3 and 4 at the San Mateo County Fairgrounds? I'm trying to decide whether or not to go. I went to the October one in Austin, and that was heaps of fun. This one should be great, too. Tomorrow, Wed. March 19, is the deadline to apply.by SebastienBailard - General
While I hadn't heard of Dr Rupert Soar's work, (Andy's link), it looks interesting. Jay Swift's video of the clay (cement?) depositing machine happens to be from Dr. Behrokh Khoshnevis at USC: Khoshnevis has an interesting approach to powder-bed 3D printing. Instead of using a laser to sinter material, he sprays down a sintering inhibitor as needed, and then fuses the material using a bar heby SebastienBailard - Paste Extrusion Working Group
If you look here you can find a few on 'robocasting' by some Sandia people: One paper mentions 'alumina powder, water, and Darvan 821A as a dispersant'. (60% solids). =========================== Later on some people in the Colloids Assembly Group at University of Illinois at Urbana-Champaign people start playing around with various agents to turn the material into colloidal gels and stuff.by SebastienBailard - Paste Extrusion Working Group
People may want to check out It's a huge unsorted mass of information about pcb fabrication, like "I've been using the STAEDTLER permanent Lumocolor "S" 313-2 Its red ink, the pen has a black body with a "S" on the red cap The ink is a little clear on copper but works with ferric chloride I buy them at the local newsagent about $3.25 have a scribble in the shop to check it out first." -----by SebastienBailard - General