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Robots, children's blocks, wooden clocks, its all good! Here's my idea and here's the [[page]] on RepRap's wiki where we can log in and click "edit".
Re: Rapid Manufacturing: The Technologies and Applications of Rapid Prototyping and Rapid Tooling - 17 years ago
Nope. "Rapid Prototyping - Laser-Based and Other Technologies" is very good. I highly recommend it. Rapid Prototyping: Laser-Based and Other Technologies by Patri K. Venuvinod, Weiyin Ma # ISBN-10: 1402075774 # ISBN-13: 978-1402075773 It's cheaper (USD$16.52 + shipping) viaby SebastienBailard - General
Re: No offense, but... - 17 years ago
1) You've got a good point regarding being lathes able to self-replicate, as do kilns and smithies. We've never claimed otherwise. If I wanted to quibble I'd say you need a lathe + a set of castings, and a way to make the electric motor. However, a lathe can only replicate itself in the hands of a skilled operator, and it's still quite a bit of work. An untrained ten-year-old can build a RepRby SebastienBailard - General
Re: 3d metal printed sculptures - 17 years ago
No, the laser melts the binder, and the binder then flows into the gaps between the other particles (hereafter referred to as "structural" particles) and glues them together. (In Indirect SLS). After this, you can do postprocessing, like (1) dip it in some material that infiltrates the gaps between the structural particles, like bronze or maybe cyranoacetate (superglue), or (2) pack it in alumiby SebastienBailard - Powder Printing and Selective Laser Sintering
Re: 3d metal printed sculptures - 17 years ago
The process is called Selective Laser Sintering (SLS). If you use a laser to directly fuse a powder it's called Direct Selective Laser Sintering. If you use a laser to fuse the binder portion of a mixture of a poweder and a binding agent it's called Indirect Selective Laser Sintering. Sometimes the binding agent is a coating on the powder grains, sometimes it's a separate powder. I imagine buby SebastienBailard - Powder Printing and Selective Laser Sintering
Re: IRC channel? - 17 years ago
Things to remember about IRC: 0) Expect delays in conversation. People can be busy or away from the computer. If you are away, use the /away command. 1) Stay logged in, and use the /away command when you're busy or away from the computer. This way people can ask you a question, you can see and answer the question a few hours later, and they can the response when they check irc. e.g. Z - "Sebby SebastienBailard - General
Re: IRC channel? - 17 years ago
I'm usually on irc, in the channel #reprap on the server irc.freenode.net It's usually fairly quiet, but that's because no one knows about it. I favor irc over the other messaging tools because there's already multiple communities there. The irc client xchat works well.by SebastienBailard - General
Re: $20 DNA replicator - 17 years ago
Here's the group's paper: via: via: The new scientist link.by SebastienBailard - General
Re: Repository usage - 17 years ago
On Thursday 26 April 2007 11:50, RepRap Forum Mailer wrote: > Author: ZachHoeken > Username: ZachHoeken (mykin.us) > Subject: Re: Repository usage > Forum: Developers > Link: > Approved: Yes > > who has the best contacts with the AoI team? i bet if we asked nicely / > promised the developer a free set of printed parts, they would do it for > us! > > =) I'llby SebastienBailard - Developers
Replication Rate Estimate? - 17 years ago
Hey all. I'm doing up my slides for Penguicon, (and, as is traditional for presentations, I'm trawling through all the other photographs, slides, videos, etc, that we have.) I was wondering, what's our current estimate for the RepRap replication rate? (The time for one unit to print all the plastic parts for the next unit.) Also, what's the total volume/weight of the plastic parts in Darwiby SebastienBailard - Developers
Re: The rebirth of the peristalic pump? - 17 years ago
There's only up and down pressure on the tube, from the row of rectangular plates. (The rectangular plates only oscillate in the z axis.)by SebastienBailard - Paste Extrusion Working Group
Re: Darwin STL files - 17 years ago
More documentation is better. If you find holes in our docs, let someone with write-permission to the wiki know, or ask for write-permission yourself, if you feen gung-ho. I don't think the STL files are up yet, you may need to bug ed for them.by SebastienBailard - General
Re: Alexa rating - 17 years ago
On Friday 13 April 2007 14:22, RepRap Forum Mailer wrote: > Author: Forrest Higgs > Username: Forrest Higgs (206-55-252-246.adsl.sta.mbay.net) > Subject: Alexa rating > Forum: Developers > Link: > Approved: Yes > > Wow! I don't know what happened but both fab@home and reprap's alexa > ratings both just took off like a turpentined cat. > > > > Huh, my litby SebastienBailard - Developers
Re: One of These Wikis is Not Like the Other ... - 17 years ago
Sorry for not replying to this earlier; I had been putting it off until I completed a task. Short version: I'd planning on putting up an installation of plone and, if people like it, tearing down the mediawiki. Again, if people like it, I'd like to us to consolidate the twiki stuff into plone. -Sebastienby SebastienBailard - Reprappers
Re: M5 Grub Question - 17 years ago
On Tuesday 10 April 2007 16:07, you wrote: > ***p.s. I imagine if you are ever desperate you can cut the head off a > bolt, grind it smooth, and cut a slot into the top.*** > > What's to stop you, aside from machinery aesthetics, from just using a > standard M5 bolt that's longer than that hole it sits in and let the top > stick out? :-) > I'm assuming Ed and Adrian had a goby SebastienBailard - Developers
Re: M5 Grub Question - 17 years ago
On Tuesday 10 April 2007 14:55, Zach 'Hoeken' Smith wrote: > Do those grubs need to be made out of steel? I'm on Amazon looking at > parts, and it seems they only offer them in Nylon. Is that acceptable? I'm guessing Nylon won't be good - the grub screw is to hold a shaft in place, probably, and steel will bite into the shaft better. Amazon Industrial -> set screws -> M5, M8, etby SebastienBailard - Developers
Re: RepRap Foundation - 17 years ago
I'm in the middle of writing a longer letter about that, but it keeps devolving into a anarcho-socialist denunciation of intellectual property and late-stage capitalism. I'll try to clean it up and submit a final draft to you guys in 12-24 hours. One note: I don't think we can sell kits or parts until the FDM patent expires. -Sebastien On Thursday 05 April 2007 18:40, Zach Hoeken wrote: &by SebastienBailard - Developers
Re: Timetable to Darwin release - 17 years ago
On Monday 02 April 2007 07:00, you wrote: > Hi! > > Thanks. Here's the angle tie bracket. Let me know how it goes and if you > want more I'll start a checkout system so the work doesn't get duplicated. > > Cheers Sebastien, > > eD I'm chewing on it right now. A thought occurs to me - we should see if any of the forum-folk want to help. Also, could you send me the dwby SebastienBailard - Developers
Re: Robot arm with interchangable head? - 17 years ago
Agreed. I don't know of the robots in the continuum between Kuka and these robot arm kits: but there must be a bunch of them out there. Extruder heads are light enough that repurposed pick and place robots might do the job; although I think I'd start by trying to RepRap a robot arm.by SebastienBailard - General
Re: Parts DB Site - 17 years ago
On Monday 26 March 2007 21:13, Zach Hoeken wrote: > Hey All, > > With the influx of new members, (and the influx of their first > question: is there a list of parts i need?) I've decided to dust off > the old objects site. I'm re-purposing it as a Parts DB instead of a > community oriented site... i think the forums / wiki fill that nice > quite nicely. > > Instead,by SebastienBailard - Developers
Re: Robot arm with interchangable head? - 17 years ago
I did some poking around, and the small robot arms (serial robots) that kuka makes: have a positioning accuracy of 0.02-0.05 mm. That's not a good as a cnc machining center with a comparable sized workspace, and a positioning accuracy of .0002 mil (0.005 mm) but you could probably improve it by adding rotary or linear encoders and crossbracing, (i.e. making it more look like a RepRap.) I thinkby SebastienBailard - General
Re: CAPA as support material for ABS, HDPE, etc? - 17 years ago
I was wondering because you mentioned something about how we can't print out Darwin without support material. -Sebastien On Monday 19 March 2007 06:55, Adrian Bowyer wrote: > Sebastien Bailard wrote: > > I was wondering, do low-T materials like CAPA work as support material > > for higher-T materials like ABS, HDPE, etc? > > They ought to - the transient heating as the hiby SebastienBailard - Developers
Re: Darwin Rod Size - 17 years ago
On Sunday 18 March 2007 09:02, Adrian Bowyer wrote: --snip-- > Anyone know the nearest non-metric thread to M8? Pitch doesn't matter > (fix in software). > > Best wishes > > Adrian There's 5/16" threaded rod, which is 7.9375 mm You can find 5/16"-18 UNC and 5/16"-24 UNF. 5/16"-18 is more common than 5/16"-24; looking in the travers.com catalog, for hex cap screws they offerby SebastienBailard - Developers
Re: Darwin Rod Size - 17 years ago
On Sunday 18 March 2007 16:16, Zach Hoeken wrote: > great. the one thing i was worried about was not being able to use > these skate bearings, but i got out my calipers and measured them... > the inner hole has a diameter of 8mm. if you havent experimented with > them yet adrian, get yourself down to a skate shop (wish i could be > there to see it) and get some replacement bearinby SebastienBailard - Developers
Re: Darwin Rod Size - 17 years ago
On Saturday 17 March 2007 21:37, Zach Hoeken wrote: > where exactly do i get the stuff? is mcmaster a good supplier? > Yes. mcmaster is reliable, if expensive for some things. You would also have success by calling your local metals suppliers and fasteners suppliers and asking for 8 mm (or maybe 5/16") steel rod - check your phone book. Home depot may have 5/16 rod as well. You're pby SebastienBailard - Developers
Re: Fwd: RepRap Board Buy - 17 years ago
is run by sparkfun. They wait till they have have enough boards for a group run, and then they send it to goldphoenix has a good reputation, according to the web hivemind. (I believe someone recommended them to me, but I'm not sure.) If we happen to go through them for our final order, it's USD$89.99/155inch^2, or $0.58/inch^2. Also, they don't cut up their boards. They score them, bby SebastienBailard - Developers
PVA notes. - 17 years ago
This is a brief note I've originally posted as a blog comment, in the "Sebastien's polyethylene glycol" thread, because it may fall off the map, otherwise. Also blogger.com is very slow tonight. -Sebastien (in response to Adrian's observation that the extruder seems to just chew up the citric-acid doped PEG.) Drat. I had my hopes up. Maybe it will work with the pinchwheel. I emailed Drby SebastienBailard - Developers
Test of mailing list - 17 years ago
This is a test of the developers mailing list. -Sebastien _______________________________________________ Developers mailing list Developers@reprap.orgby SebastienBailard - Developers
polyethyene glycol - 17 years ago
I was googling "polyethylene glycol miscible" because I was wondering if lecithin is PEG miscible, when this came up: apparently PEG and citric acid form a soft gel. I don't know that a soft gel would be useful, but this: is more promising. Barone found that molecules containing hydrogen and oxygen--such as glycerol, sorbitol or polyethylene glycol--reacted with citric acid to produceby SebastienBailard - Developers
Re: pcb group buy - 17 years ago
I took a quick look at www.pcbnet.com. (They were highly recommended to me.) It looks like it would cost $14/person, for 4 universals and 1 powercomms, 25 people in on the order, 2 weeks turnaround time. (This is _with_ factoring new customer deals.) I'll doublecheck my math when I get back from class. Zach, I sent you the details via email. -Sebastienby SebastienBailard - General