Show all posts by user
Cartesian XYZ machines with frames made of extruded aluminum, T-Slot, Makerslide, and more. See http://reprap.org/wiki/Category:Aluminum. Previously named "Extruded Aluminum"
Re: DIY $1500 Metal Printer - 12 years ago
From my readings, the biggest challenge to printing an overhanging profile is caused by the varying heat flux. That is as you move away (up) from the build platform the temperature gradient of the object is not consistent. It can be done, and there are examples. Example of an overhanging profile: My notes are incomplete for this image, but I think it's an example of varying heat flux for low mby A2 - General
Re: DIY $1500 Metal Printer - 12 years ago
That's called the StarJet, I like that design, and from what I have read they are pursuing a patent. The design solves the problem of leaking, but I think it's prone to clogging from particulate and oxidation due to the small orifice diameter. They have made some changes though to improve it some. The groves allow an inert gas to bathe the liquid metal. The land length of the groves, and the smaby A2 - General
Re: Worm Drive Grounded Delta Printer - 12 years ago
@Solidus Labs If you discover that the motor bracket is flexing, you can create some thing like the following to increase the rigidity of the bracket.by A2 - Delta Machines
Re: DIY $1500 Metal Printer - 12 years ago
The LISA 3d Delta Printer would be a good platform to further develop GDMm, as it uses steel threaded rods, which can support a lot of weight. Consider making the arms out of metal (aluminum, steel), or epoxy/glass/carbon fiber. Add a worm gear drive to give it an added measure of safety (anti-reversing), and the ability to move a heavy mass. LISA Simpson Worm Drive Grounded Delta Printerby A2 - General
Re: Grounded Experimental Delta Printer - 12 years ago
@nicholas.seward Simpson 3d printer calibration: What does calibration involve, after thinking about it I don't have a clue If I were to guess calibration would entail some of the following: Accurately measure the center to center distance of pivots (arm lengths). Temperature control of hot end and platen. End stop firing. Stepper motor voltage, amps. Platen leveling. The amount of nonlinearby A2 - Delta Machines
Re: DIY $1500 Metal Printer - 12 years ago
@tleneel OK, I see I misinterpreted you, sorry about that!by A2 - General
Re: Add A Date Field To RepRap Wiki - 12 years ago
Thank you, I registered and I will look into it. Date filed should be static.by A2 - Administration, Announcements, Policy
Re: LISA Simpson - 12 years ago
The metal screws make this concept a better platform for the globular deposition modeling of metal welding (GDMm), as it could support a lot of weight! Add a worm drive, and it could really lift/support a heavy weight. Components are looking good! What is the fit of the bearing like over the threads (slip, interference)?by A2 - Delta Machines
Re: DIY $1500 Metal Printer - 12 years ago
This is exciting, we now have Globular Deposition Modeling of metal (GDMm) I can't wait to see the first organic frames for cars, motorcycles, scooters, bikes, wheelchairs, hospital devices, and the like! You can make hardware for the home, farm implements, cookware, sporting goods, the list goes on... I bet there will be some cool steampunk art/costume that could be made with it too. There's aby A2 - General
Re: DIY $1500 Metal Printer - 12 years ago
We need a metalstruder Michigan Technological University (www.mtu.edu)by A2 - General
Re: DIY $1500 Metal Printer - 12 years ago
Substrate: an article that is placed on top of the platen (build table/platform) which supports, and facilitates metal welding of a 3d objects. The instruction doesn't mention what type of substrate it's printing on. Reusable substrate: It would be beneficial to identify a substrate that conducts electricity (i.e. a ground), prevent's or reduces warping, and easily releases the printed objectby A2 - General
Re: DIY $1500 Metal Printer - 12 years ago
Michigan Technological University (www.mtu.edu) A link within the article: Open-source metal 3-D printer The work is described in "A Low-Cost, Open-Source Metal 3-D Printer," to be published in IEEE Access (DOI: 10.1109/ACCESS.2013.2293018).by A2 - General
Re: Grounded Experimental Delta Printer - 12 years ago
Tks Nicholas for the update, that's good news! Calibration - Validation: I'm hoping that the calibration works out for you, and I'm looking forward to the validation phase! Print envelope size (new arms): What is the largest X,Y square box length that Simpson can print with a height of 63.5 mm (2.5 inch Z)? @Owen, The new arms look great! Tks for posting the video. Hysteresis, Brownian moby A2 - Delta Machines
Re: LISA Simpson - 12 years ago
QuotePeteD Would a spinning threadless ballscrew work as a filament driver? Or is the diameter of filament too unreliable? The biggest hurtle I can think of is that variation in the filament diameter would cause the ballscrew to disengage. I had the same idea, and have made paper sketch of it as a reminder. The main challenge that I see with it is that the filament would rotate with a singleby A2 - Delta Machines
Re: LISA Simpson - 12 years ago
@Dannydefe A few ideas: Graphite loading: If there is not a heavy loading of graphite at the interface of the nut and thread, it will always be sticky, and require lubrication. Purchased Tap: Keep in mind that the tap will in general reproduce the same size of the nut that you purchased. If you were for an example to use Nylon rod and tap it, most likely it will be undersized, and produce a tby A2 - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
@ pjoyce42 Quotepjoyce42 Is the GUS Simpson a viable option as a first 3D printer? Why or why not? I think Simpson is a viable printer if you are only creating objects that fit air (vase, art) or can work with large tolerances (400 microns = .016 inch). If you need to produce objects with a higher precision then you'll have to wait for the Marlin firmware to be updated, or consider another pby A2 - Delta Machines
Re: Metal-print Reprap - 12 years ago
Disclaimer: This post does not constitute legal advice. I am not an attorney. I do not have expertise in these matters. I discourage everyone from trying this. @ Hp_ 3D Plastic Printer: I missed that the hot end was your creation, it looks great. I want one of your nozzles for plastic filament testing, how do you prefer to be paid? I was originally attracted to zirconia as an insulatoby A2 - Developers
Re: new dimension of reprap electronic? - 12 years ago
@ iquizzle I like your ideas Any mods or product additions that can make the user experience less painful, or adds another way of doing something is a plus.by A2 - General
Re: Metal-print Reprap - 12 years ago
Oxidation will prevent bonding. Cool zirconia nozzle, is there plans to sell it? I have a few Coors zirconia parts that are precursors to a ceramic bearing. I've thrown it at the pavement repeatably and it's as strong as steel, pavement chips. F1 uses the same material for the valves.by A2 - Developers
Re: LISA Simpson - 12 years ago
It's too many years since I've seen one, I don't know how far off it could be after 1000's of moves, another engineers project. But they are good for slightly dirty wet environment. Creep of the plastic housing, and the shaft that holds the bearing would be my main concern for a DIY version. I've only seen aluminum block used with precision threaded shaft, I forget the name, Carr Lane or anotherby A2 - Delta Machines
Re: LISA Simpson - 12 years ago
You need to use a harden steel rod or the bearing edges will wear a grove. Backlash is about .002, but it depends on how much you load the bearing. Naturally self cleaning.by A2 - Delta Machines
Re: RadRacer builds a "BerryBot3D" - 12 years ago
You have a lot time and energy invested in your printer (work of industrial art). I would like to see how accurate your machine can print, but you may have other goals in mind. So disregard my suggestion, but maybe some one reading your thread might find this interesting. Regardless of how accurate you have fabricated the components, the assembly will not be ideal, especially with the projectioby A2 - General
Re: RadRacer builds a "BerryBot3D" - 12 years ago
@ Rad Racer How are you going to calibrate perpendicularity and parallelism of the 3 longitudinal guide rods?by A2 - General
Re: Stratasys sues Afinia - 12 years ago
Disclaimer: This post does not constitute legal advice. I am not an attorney. I do not have expertise in these matters. mattrobbo10 asked in the RepRap IRC if the innovation act 2013 help us outside the US. New Patent Legislation: Innovation Act of 2013 By Dennis Crouch Representative Bob Goodlatte (R-VA) with the bipartisan support of ten other members of the House has introduced a new set oby A2 - General
Re: Stratasys sues Afinia - 12 years ago
Disclaimer: This post does not constitute legal advice. I am not an attorney. I do not have expertise in these matters. I was unaware that there was a challenge period for a newly submitted patent. The USPTO website does not make it easy to locate where the patent challenges reside, I'm not able to find where the challenge link is? This is very interesting, I'm curious if you can get on the patby A2 - General
Re: Closed-loop stepper controller progress - 12 years ago
Ah, OK, I kind of understand then why the encoder was used with a DC motor, tks.by A2 - General
Re: Problem compiling Marlin - claims variables are not defined - 12 years ago
@ Traumflug I understand that Marlin firmware won't work as it is on a SmoothieBoard. I was on the SmoothieBoard IRC channel, and I was told that I could recode the Marlin firmware to work. FYI: I'm not a programmer so I'm unsure what terms to use. That said they told me to make some kind of request? for help to make the transition. I think they have Repetier working on the SmoothieBoard, so Iby A2 - Firmware - mainstream and related support
Re: Problem compiling Marlin - claims variables are not defined - 12 years ago
@ Traumflug Where do the Marlin developers hangout? I'm considering the SmootieBoard, and I imagine that I will need some guidance converting Marlin to work with it. Tks.by A2 - Firmware - mainstream and related support