You don’t think of hobby-grade 3D printing as a good method for creating rocket nozzles. But [Mister Highball] managed to create a copper nozzle using a common printer, a kiln, and some special copper-bearing filament.
The copper filament is about 90% metal. Virtual Foundry recommends preheating it before printing and you have to sinter it in an oven to remove the plastic and leave a solid metal piece which will, of course, shrink.
Continue reading “3D Printed Copper Rocket Nozzle Costs Under Two Grand”
A few machines have truly changed the world, such as the wheel, steam engines, or the printing press. Maybe 3D printers will be on that list one day too. But for today, you can use your 3D printer to produce a working printing press by following plans from [Ian Mackay]. The machine, Hi-Bred, allows you to place printed blocks in a chase — that’s the technical term — run a brayer laden with ink over the type blocks and hand press a piece of paper with the platen.
The idea is more or less like a giant rubber stamp. As [Ian] points out, one way to think about it is that white pixels are 0mm high and black pixels are 3mm high. He suggests looking at old woodcuts for inspiration.
Continue reading “3D Printed Printing Press Turns You Into Gutenberg”
[Shih Wei Chieh] has built a laser cyanotype printer for fabrics. You know, for art!
How do you get an inkjet head on a shoe or a couch? Most printing processes require a flat surface to print. But hearkening back to the days when a blueprint was a blueprint, a mixture of an iron salt and an acid are mixed and applied to a surface an interesting reaction occurs when the surface is exposed to UV light. The chemicals react to form, of all things, prussian blue. After the reaction occurs simply washing away the remaining chemicals leaves a stable print behind.
[Shih Wei Chieh] uses two galvanometers and a laser to cure the fabric. He uses a slightly newer process which reduces the exposure time required. This lets him print very large pictures, but also on uneven surfaces. As you can see in the video, viewable after the break, the effect is very pretty. There’s a new way to have the coolest pen plotter on the block.
Continue reading “Use Blueprint Process To Print On Fabric With Lasers”
One of the unfortunate things about Hackaday’s globe-spanning empire is that you often don’t get to meet the people you work with in person. Since I was in China and it’s right next door, I really wanted to pop over to Vietnam and meet Sean Boyce, who has been writing for Hackaday for a couple of years, yet we’ve never met. I suggested we could make this happen if we put together a meetup or unconference. Sean was immediately confident that the Ho Chi Minh City hardware hackers would turn out in force and boy was he right! On Sunday night we had a full house for the first ever Hackaday Vietnam Meetup.
Continue reading “Hacker Abroad: Vietnam’s Hardware Hackers”
Printing customized Christmas cards is a trivial matter today: choose a photo, apply a stock background or border, add the desired text, and click a few buttons. Your colorful cards arrive in a few days. It may be the easiest way, but it’s definitely no where near as cool as the process [linotype] used this season. (Editor’s note: skip the Imgur link and go straight for the source!)
The first task was to create some large type for the year. [linotype] laser printed “2018” then used an iron to transfer toner to the end of a piece of scrap maple flooring. Carving the numbers in relief yielded ready-to-go type, since the ironing process took care of the necessary mirroring step. The wood block was then cut to “type high” (0.918 inches; who knew?) using a compositor’s table saw – with scales graduated in picas, of course.
Continue reading “Printing Christmas Cards The Hard Way”
The journalist’s art is now one of the computer keyboard and the internet connection, but there was a time when it involved sleepless nights over a manual typewriter followed by time spent reviewing paper proofs freshly inked from hot lead type. Newspapers in the golden age of print media once had entire floors of machinery turning text into custom metal type on the fly, mechanical masterpieces in the medium of hot lead of which Linotype were the most famous manufacturer.
Computerised desktop publishing might have banished the Linotype from the newsroom in the 1970s or 1980s, but a few have survived. One of the last working Linotypes in Europe can be found in a small print workshop in Vienna, and since its owner is about to retire there is a move to save it for posterity through a crowdfunding campaign. This will not simply place it in a museum as a dusty exhibit similar to the decommissioned Monotype your scribe once walked past every day in the foyer of the publishing company she then worked for, instead it will ensure that the machine continues to be used on a daily basis producing those hot metal slugs of type.
Fronting the project is [Florian Kaps], whose pedigree in the world of resurrecting analogue technologies was established by his role in saving the Polaroid film plant in Enschede, Netherlands. There are a variety of rewards featuring Linotype print, and at the time of writing the project is 46% funded with about four weeks remaining. If you are curious about the Linotype machine and its operation, we’ve previously brought you an account of the last day of hot metal printing at the New York Times.
The production capability available to the individual hacker today is really quite incredible. Even a low-end laser engraver can etch your PCBs, and it doesn’t take a top of the line 3D printer to knock out a nice looking enclosure. With the wide availability of these (relatively) cheap machines, the home builder can churn out a very impressive one-off device on a fairly meager budget. Even low volume production isn’t entirely out of the question. But there’s still one element to a professional looking device that remains frustratingly difficult: a good looking front panel.
Now if your laser is strong enough to engrave (and ideally cut) aluminum sheets, then you’ve largely solved this problem. But for those of us who are plodding along with a cheap imported diode laser, getting text and images onto a piece of metal can be rather tricky. On Hackaday.io, [oaox] has demonstrated a cost effective way to create metal front panels for your devices using a print service that offers Dibond aluminum. Consisting of two thin layers of aluminum with a solid polyethylene core, this composite material was designed specifically for signage. Through various online services, you can have whatever you wish printed on a sheet of pre-cut Dibond without spending a lot of money.
As explained by [oaox], the first step is putting together the image you’ll send off to the printer using a software package like Inkscape. The key is to properly define the size of the Dibond plate in your software and work within those confines, otherwise the layout might not look how you expected once the finish piece gets back to you. It’s also important to avoid lossy compression formats like JPEG when sending the file out for production, as it can turn text into a mushy mess.
When you get the sheet back, all you need to do is put your holes in it. Thanks to the plastic core, Dibond is fairly easy to cut and drill as long as you take your time. [oaox] used a step drill for the holes, and a small coping saw for the larger openings. The final result looks great, and required very little effort in the grand scheme of things.
But how much does it cost? Looking around online, we were quoted prices as low as $7 USD to do a full-color 4×4 inch Dibond panel, and one site offered a 12×12 panel for $20. For a small production run, you could fit several copies of the graphics onto one larger panel and cut them out with a bandsaw; that could drop the per-unit price to only a couple bucks.
We’ve seen some clever attempts at professional looking front panels, from inkjet printing on transparencies to taking the nuclear option and laser cutting thin plywood. This is one of those issues the community has been struggling with for years, but at least it looks like we’re finally getting some decent options.