Quotethe_digital_dentist but what gets damaged? It depends... There doesn't seem to be a simple answer. This abstract from an academic paper (unfortunately behind a paywall) gives some idea of the complexity: QuoteOn Competing Failure Modes in Rolling Contact Rolling contact failures are classified according to their failure mode as (a) wear, (b) plastic flow, (c) fatigue, and (d) bulk failuresby MattMoses - Mechanics
QuoteElmoC You might be in the wrong forum for that information. Ink jet heads don't work anything like 3D printers. RepRap is more than 3D printers. Even if RepRap were only about 3D printers, many 3D printers are based on inkjet technology: 3DP 3D Inkjet Powder printer, Y-Tec Plan B, Pwdr printer, and so on... There are a lot of great projects and resources about hacking inkjets and building Dby MattMoses - General
Quotemdowns8357 Has anyone tried anything remotely like this? There are several examples of working FDM using solder or low-melting-temperature alloys (see links below). None that I know of use aluminum, although electron beam additive manufacturing can use a wide variety of different metal wires for source material. QuoteRead Before Posting - Technical Questions and Answers 25. Has anyone tby MattMoses - General
31. Has anyone used a 3D printed plastic part as a mould master, in a process akin to lost-wax casting? Yes. See: Metal bits from a RepRap and Lost PLA Casting from 3D Prints - from Read Before Posting - Technical Questions and Answersby MattMoses - General
OK, here you go: Smoothie forumby MattMoses - Administration, Announcements, Policy
Hi ipcalit, thanks for sharing this. I hope you keep us posted with how the project turns out. If you don't already know this, you may be interested that many of the early RepRap designs did in fact use DC motors with encoders. Here are some (very) old links about extruder controllers using encoders: MagServo Extruder Controller 2.2 Magnetic Rotary Encoder v1.0 Nophead also did quite a bit ofby MattMoses - General
Quotebobc If the author, or representative of the authors would like to claim the bounty, I would be happy to award it. Hi bobc, you may have seen this already, but just in case: jbernadis stated he would like to claim the bounty. Because you opened the issue on the tracker, I think you are the only one who can close it. If you would like to proceed with awarding the bounty to jbernardis, it lby MattMoses - Bounties
QuoteWillStevens It needs more work to increase the available torque - the diameter of the toothed wheel could be increased. I expect that the solenoid/electromagnet actuator can also be improved. It consumes about 7W when switched on. I can't really see the details of the mechanism in the video, so it may already incorporate what I am about to suggest, but here goes anyway: Would it help to usby MattMoses - Developers
Hi Will (and everyone else). I saw the latest post on your blog with the Overall plan for a 2D plotter. I can't wait to see this in action! In related news, there was a recent post on Hackaday that readers of this thread might be interested in: Cardboard and paperclip CNC plotter destined for self-replication The cardboard and paperclip CNC is driven by an arduino and RC servos, but it is noby MattMoses - Developers
Gen7 appears to be available.by MattMoses - General
Looks great! The packaging looks very clean. I can already think of a few projects where I could use this. A question about the name: The stepper driver boards are named after Pololu, not Polulu. So wouldn't that make your board a Servololu instead of a Servolulu?by MattMoses - General
This is great work Andrey_SSh, thank you for sharing! We have talked about EDM in other threads on the forum. You might be interested in this thread: DIY EDM Can you show us how the driving circuit works? What is the voltage and capacitance you are using? How is the tooltip Z position controlled? Is this with the build platform Z motors or with a modified extruder? When the tooltip is positby MattMoses - General
Quotetoxuin Such platform would connect makers in their garages and people that don't mind paying more than $10 for a good thingy, sometimes even with getting personal with the author. How would this be different from ebay? We tried to make a platform here in the RepRap forums/wiki that would help to fund open source developers, and help provide incentive for them to share their work: Bounties.by MattMoses - General
Quotegmh39 Oh, and the US is a first-to-file country now. Discussing things in a forum or community doesn't get you anything except the possibility of someone patenting your idea before you. This is incorrect. The US system may be called "first-to-file", but the way it actually works is more complicated. Discussing things in a forum or community does prevent someone else from patenting your ideaby MattMoses - General
Hi oangelo, It would be great if you were to update those pages on the wiki. If you would like to get a wiki account so you can edit the wiki, please see the instructions here: Help getting new Wiki accountsby MattMoses - General
*NEWS* Asking someone else to create a wiki account is no longer needed. See message. If you would like a RepRap Wiki account and you do not have one already, please send a PM to MattMoses or DeuxVis or thejollygrimreaper and we can set one up for you. In the PM please include a valid email address and your desired username for the wiki account. At the moment, the only way to get a new wiki acby MattMoses - General
That's a nice looking chart. It would be interesting to see how other things trend (can't think of anything specific at the moment, but I'm sure there are tons of interesting topics to track). Anyway... I am OK with adding a Smoothie forum. (I am OK with adding forums for certain other boards/firmwares too...) As we did with the Duet forum, how about we wait a week or two and see if there are aby MattMoses - Administration, Announcements, Policy
Hi, please see this thread for instructions on getting a new wiki account.by MattMoses - General
QuoteLoboCNC I'm thinking about designing a servo motor controller/driver that would be a drop-in replacement for the standard Polulu stepper drivers. I think this is a great idea! It is something I've wanted to work on for some time, but never got around to it. There was a discussion about this very same idea in this thread from two years ago. The price point I came up with back then was $19.25by MattMoses - General
Quoteposthuman_1000 Please could I have an account created too. Yes. Please send a PM to myself or DeuxVis with your email and desired username for the wiki.by MattMoses - Administration, Announcements, Policy
QuoteSysAdmin Is it possible to have an account created so I can log in? Yes. Send me a PM with your email and your desired username. Please note: I can't make your wiki username "SysAdmin" - people would get really really confused when you make edits. You can be something like "SysAdminIRL" or "SysAdminDude" or "SysAdminGuy" or something else entirely. But no "SysAdmin"by MattMoses - Administration, Announcements, Policy
QuoteSysAdmin One last thing, I was not able to log in, onto the www.reprap.org home page. On the extreme top right, there is a little "log in" link. Since I am new here I don't have any account with which to log in and there is no place to register. I tried logging in with my forum account credentials but it didn't work. Where can I register for that? Wiki account creation is temporarily disableby MattMoses - General
Quotedaemonburrito More generally, I'm wondering about resources for maintenance of the mother reprap site, and if there is a shortage of people with time and energy, because I'd love to help out more, and I've got some of both atm. I would really like to get you a working account! Sorry for the delay on this. I sent another email to the admin mailing list. I hope we can work out a solution.by MattMoses - Administration, Announcements, Policy
If you would like a RepRap Wiki account and you do not have one already, please send a PM to MattMoses or DeuxVis or thejollygrimreaper and we can set one up for you. In the PM please include a valid email address and your desired username for the wiki account. At the moment, the only way to get a new wiki account is to have an admin set one up for you manually. We have been having trouble withby MattMoses - Administration, Announcements, Policy
Thingiverse made an announcement about this here. and Michael Weinberg posted some interesting discussion on his blog here.by MattMoses - General
This looks great! I would definitely like to try my hand at milling a board. Is there a guide and/or advice on how to prepare the files for milling and drilling?by MattMoses - Controllers
QuoteWillStevens It uses 14 relays for the stepper motor driver, 15 for the 2-bit divider stage and 2 for the clock. The clock timing is determined by two capacitors made from sodium-bicarbonate solution and aluminium foil (in the glass beakers). I like the capacitors. Do you have an estimate for what value they are? What is the maximum clock speed? Are the capacitors necessary or does it juby MattMoses - Developers
These videos show a tool changer on an Ultimaker that appears to work quite well: Ultimaker fast tool change UM tool changer repeat accuracy If you haven't found these old threads already, they show some design ideas that may be helpful: Rapid Tool-Head changer (very light multi-extruder) Tool change like HP pen plotterby MattMoses - General
Quotethe_digital_dentist in what sense is using a handful of $5 relays ... any improvement over using a $5 single-chip? Will said it best earlier in this same thread: QuoteWillStevens There is the practical goal of making a cheap, autonomous, and versatile personal manufacturing system. If that is the objective then the number of vitamin parts and the complexity of the machine and its control sby MattMoses - Developers
Cool! I'm looking forward to seeing the circuit diagram. QuoteWillStevens Here's a video of a stepper motor controller made from relays: I'll post the circuit diagram later.by MattMoses - Developers