Hi Folks, Are there any objections if this thread gets moved to the Prusa i3 and variants forum? That seems like a more appropriate place for it. -Mattby MattMoses - Prusa i3 and variants
Hi Folks, Are there any objections if this thread gets moved to the Prusa i3 and variants forum? That seems like a more appropriate place for it. -Mattby MattMoses - Prusa i3 and variants
This was posted on Hackaday a few days ago: Machine metal with electricity: An EDM attachment for 3D printers. The youtube videos the developer posted are long on hype and short on details, but at any rate it is interesting to see that other people are recognizing the potential for EDM + low cost 3D printer.by MattMoses - General
A technical description of one of the early RepRap slicing algorithms is described here. Just for future reference, I found this link by going to the sticky post at the top of the General forum called Read Before Posting - Technical Questions and Answers and then I looked up the question How does a slicer algorithm work?by MattMoses - Developers
That is a great video - I like that guy's workshop. Thingiverse seems to have everything you need (and more) to piece together a 3D printed Xaphoon: Saxophone & Clarinet Reeds Alto Saxophone Mouthpiece Mouthpiece-to-PVC adapter Recorder V2 (instrument) to name just a few examples.by MattMoses - General
QuoteCraigMoberg I was wondering if there was actual case law behind some of the assertions There are tons of case law examples in Michael Weinberg's article "What's the deal with copyright and 3D printing?". Here is the link again for convenience.by MattMoses - General
QuoteAndrewBCN The GPL is a specific kind of license and I do not see in what way it cannot be applied to a 3D design in the process I described above It cannot be applied to a 3D design of a useful object like an extruder because you are trying to license what you do not have.by MattMoses - General
QuoteMotoBarsteward Here, we have an issue because it's not clear what is being copyrighted in the first place. Is it the OpenScad file? Is it the object produced? It is the OpenSCAD file. QuoteMotoBarsteward At the same time, there is no reason why I couldn't take his ideas and produce my own OpenScad files that would produce facsimiles of his design. Correct. QuoteMotoBarsteward Could I thenby MattMoses - General
QuoteAndreBCN I don't think I am always right, but if I am wrong in this case, at least I am - again, as I already mentioned - in good company, since Josef Prusa, Johann C. Rocholl and Greg Frost licensed their 3D designs under the GPL. This in no way supports your argument, Andrew. As I said before, I myself license stuff on Thingiverse under the GPL. Just because I click the 'GPL' button does nby MattMoses - General
QuoteAndrewBCN So: text of the GNU General Public License V3 (GPL for short). Please read it. Think about it. Ask questions if there is something you do not understand. Edit: before you ask questions about it, read the FAQ! Andrew, I diligently re-read the GPL and FAQ as you instructed. I did not find anything that contradicted my position. In fact, I found things that supported it: QuoteGPLby MattMoses - General
OK, I found it. Page is here for those interested. From the Discussion tab: QuoteAndrewBCN To all effects they have stolen the IP from others and decided to make it proprietary. Is what they did bad manners? Yes. Is what they did self-defeating? Yes. Is what they did against the spirit of Open Source? Yes. Is what they did in violation of the GPL? It depends. If they created their models by modby MattMoses - General
QuoteAndrewBCN The exact thread can be found here: Perhaps you can explain the details to us non French speakers? If they downloaded Prusa's OpenSCAD files, and then re-created Prusa's parts using their own CAD software (Solidworks, for example) they would be under no obligation to release their CAD files. (Unless Prusa's parts had non-functional artistic aspects that were covered by copyright.by MattMoses - General
Let me take a step back, Andrew. Do you agree with the following statement? If you cannot copyright it, you cannot GPL it. If you agree with that, our conversation proceeds one way. If not, another way. I stand firm in my claim that nothing can be GPL'd unless it could also be copyrighted. The question at hand is: Can a design for an extruder be protected by the GPL? My position is: No. Anby MattMoses - General
QuoteAndrewBCN because it seems you have some misconceptions about what or who the GPL is supposed to protect I am no expert on this, but I steadfastly maintain that my understanding of the GPL is still much much more accurate than yours. I am glad that you posted Eben Moglen's quote because it actually strengthens my argument. What Prof. Moglen is saying is that the GPL provides no additionalby MattMoses - General
Quotethetazzbot So what you're saying is, all these people who put this GPL on their "things" are just naive and uninformed I cannot tell if you are joking or being serious, but yes that is exactly what I am saying. Take for example these things I put on Thingiverse under the GPL: here, here, here, here, here, and here. I used the GPL for these things because I did not want some self-appointedby MattMoses - General
Hi AndrewBCN, I appreciate your civil and level-headed response. Sorry my earlier reply was somewhat hostile. I look forward to seeing your rebuttal of the Weinberg article. Even though we disagree, I think we can have an interesting conversation. Just a few comments: QuoteAndrewBCN The GPL license ... is also a contract According to several sources, the GPL is not a contract. QuoteAndrewBCNby MattMoses - General
QuoteAndrewBCN I can provide you with thousands of examples of useful designs that are protected by copyright. OK, name some. Name something where the functional aspects of a useful object are protected by copyright. QuoteAndrewBCN As for Greg's Wade's Geared Extruder, not only can the design itself be protected by copyright Says who? You? I just provided you with a well researched article writtby MattMoses - General
Hi MotoBarsteward, What you are asking about is permissible. It is permissible because the GPL does not apply to the design of a 'useful object' like an extruder. For more information, please read the excellent article by Michael Weinberg called What's the deal with copyright and 3D printing? Here is a relevant excerpt from that article: QuoteMichael Weinberg To put it simply, you cannot liceby MattMoses - General
Quotethetazzbot I still think when you combine materials the properties that make them unfavorable individually change to a more favorable set. Yes. This is called making an alloy. Quotethetazzbot Combined with bismuth at the right proportion and you basically get a new element No. You are not making a new element. You are making an alloy. Quotethetazzbot Is it stiff enough to extrude? This queby MattMoses - Reprappers
QuoteQcks_ but there's issues with acidity and creep What do you mean by this? I have never seen 'acidity' or 'creep' mentioned as challenges when extruding solder or low temp metal. Perhaps by 'acidity' you mean that the molten metal can dissolve certain alloys? This problem was described by Rhys Jones in this blog post. This can indeed be a problem, but it has nothing to do with acidity. Creby MattMoses - Reprappers
Quotethetazzbot Who's with me!? In case anyone does this, you read it here first ! lol or maybe second... People have been doing this for years. Near the top of the General forum there is a sticky post (third down from the top) called Read Before Posting - Technical Questions and Answers If you click on that and scroll down you will find these questions: Has anyone thought about 3D printingby MattMoses - Reprappers
There is a page on the wiki that includes examples, links to other projects, and some basic analysis: Compliant Linear Motion Mechanism. Delgir made an entire 3D printer using deformable objects. It is described in this thread: Parallel flexure test.by MattMoses - General
Hi fatesalign, I'm glad you got it working. Thank you very much for posting the solution to the problem. This adds value to the forum and it will help people in the future who might have a similar problem. Note: I edited the subject line of your original post so that it is more descriptive of the problem.by MattMoses - Reprappers
Also, there is an extensive wiki page on power supplies here. You might find your answer on that page.by MattMoses - General
2 quick answers: 1 - You really should check with the company that sold you the kit. You mention instructions so I assume you obtained some kind of kit... 2 - If for some reason the company that sold you the kit is unable or unwilling to provide tech support, you need to give us more information before we can help you. Especially especially when you are talking about "the part that goes into tby MattMoses - General
Hi nojam, thanks for sharing this. I like the approach. In your reddit thread you stated that you use a jeweler's draw plate with tungsten carbide inserts. Is it something like shown in the picture? So if I understand this right, the tubing is chucked in the drill press, which is spinning, and then the tube is "drilled" into one of the draw plate dies as though you were trying to drill a hole inby MattMoses - Look what I made!
You could try using G4, which is code for "dwell". A dwell is the same thing as a delay.by MattMoses - General
Very sorry to hear about your father, Z. Please accept my condolences. Thank you for sharing the schematic with us! I have some questions about the circuit. I hope it is OK that I made some edits to your drawing so that I could ask these questions. Can you confirm that my understanding of the circuit is correct?by MattMoses - Developers
I object. The only thing that seems to make Libre3D any different from the dozens of other sites listed on the wiki here or discussed on the forum here is the fact that somehow Libre3D convinced Adrian Bowyer to allow his name to be associated with them. Perhaps I am wrong about this (and if I am wrong I hope someone will correct me!) but it looks like Libre3D is a privately held for-profit coby MattMoses - Administration, Announcements, Policy
This is really great, Z. Thank you for sharing it. Can you tell us about the coil? How many turns? What is the wire gauge? Also, is it possible you could share the schematic or tell us about the circuit to drive the coil?by MattMoses - Developers