If you’ve been hanging around 3D printing communities, or reading the various 3D printing posts that have popped up here on Hackaday, you’ve almost certainly heard of OctoPrint. Created and maintained by Gina Häußge, OctoPrint allows you to turn an old computer (or more commonly a small ARM board like the Raspberry Pi or BeagleBone) into a network-accessible control panel for your 3D printer. Thanks to a thriving collection of community developed plugins, it can even control other hardware such as lights, enclosure heaters, smart plugs, or anything else you can think to hook onto the GPIO pins of your chosen ARM board. The project has become so popular that the new Prusa i3 MK3 has a header on the control board specifically for connecting a Pi Zero W running OctoPrint.
Even still, I never personally “got” OctoPrint. I was happy enough with my single printer connected to my computer and controlled directly from my slicer over USB. The majority of the things I print are of my own design, so when setting up the printer it only seemed logical that I would have it connected to the machine I’d be doing my designing on. If I’m sitting at my computer, I just need to rotate my chair to the right and I’m at my printer. What do I need to control the thing over WiFi for?
But things got tricky when I wanted to set up a second printer to help with speeding up larger projects. I couldn’t control them both from the same machine, and while I could print from SD on the second printer if I really had to, the idea seemed painfully antiquated. It would be like when Scotty tried talking into the computer’s mouse in “Voyage Home”. Whether I “got it” or not, I was about to dive headfirst into the world of OctoPrint.
Continue reading “Upgrading A 3D Printer With OctoPrint”
[Brook Drumm] of Printrbot is teasing a new 3D printer. This is no ordinary 3D printer; this is an infinite build volume 3D printer, the Next Big Thing™ in desktop fabrication.
The world was introduced to the infinite build volume 3D printer last March at the Midwest RepRap Festival with a built by [Bill Steele] from Polar 3D. The design of [Bill]’s printer began as simply a middle finger to MakerBot’s Automated Build Platform patent. This was patent engineering — [Bill] noticed the MakerBot patent didn’t cover build plates that weren’t offset to the plane of the print head, and it just so happened a printer with a tilted bed could also build infinitely long plastic parts.
While [Bill Steele]’s unnamed printer introduced the idea of an infinite build volume printer to the community, a few pieces of prior art popped up in the weeks and months after MRRF. Several years ago, [Andreas Bastian] developed the Lum Printer, an unbounded conveyor belt printer. A month after MRRF, Blackbelt 3D introduced their mega-scale tilted bed printer and later started a Kickstarter that has already reached $100,000 in pledges.
Right now, details are sparse on the Printrbelt, but there are a few educated guesses we can make. The belt of the Printrbelt appears to be Kapton film attached to some sort of substrate. The hotend and extruder are standard Printrbot accouterments, and the conveyor is powered by a geared stepper motor. All in all, pretty much what you would expect.
We do know that [Brook] and [Bill Steele] are working together on this printer, apparently with [Brook] in charge of the hardware and [Bill] taking either his slicing algorithm or firmware modifications (we’re not exactly sure where the ’tilt’ in the Gcode comes from) and getting this printer running.
While the Printrbelt isn’t ready for production quite yet, this is a fantastic advance in the state of consumer, desktop 3D printing. You can check out [Brook]’s teaser videos below.
Continue reading “Printrbot Teases Infinite Build Volume Printer”
A new version of the Printrbot Simple was released this summer, and this sleek new model includes a few highly desirable features. The metal enclosure was improved, linear rails added, a power switch was thrown in, and the biggest feature — a touch screen — makes headless printing easy.
Adding a usable display and achieving reliable WiFi are big engineering challenges, and thanks to the Internet of Things it’s only going to become more common to expect those features. How did the Printrbot team implement this? [Philip Shuster] recently released a write-up of how the Printrbot Printrhub came together.
The story of the display and WiFi module in the newest Printrbot begins about a year ago with a post on Hackaday. [Philip] built the Little Helper, a little electronic Swiss Army knife capable of basic IO, sending out PWM pulses, sniffing I2C, and a few other handy features. The Printrbot team reached out to [Philip], and after a few conversations, he was roped into the development team for the Printrhub.
Departing slightly from the Little Helper, the Printrhub features the same microcontroller found in the Teensy 3, a 2.8 inch TFT display, capacitive touch sensor, microSD card slot, and an ESP-12 module to handle the WiFi connection. The display system was tricky, but the team eventually got it working. Using an ESP8266 as the WiFi module for a printer is more difficult than you would think, but that works too.
One of the more interesting challenges for 3D printers in the last few years is the development of a good printer display with wireless connectivity. Yes, those graphic LCDs attached to an Arduino still work, but a display from 1980 doesn’t sell printers. In just a few months, the Printrbot team came up with a relatively simple, very elegant display that does everything and they’re releasing all the hardware as open source. That’s great news, and we can’t wait to see similar setups in other makes of 3D printers.
Building a big 3D printer has its own challenges. The strength of materials does not scale linearly, of course, and long axes have a tendency to wobble. That said, building a bigbot isn’t hard – stepper motors and aluminum extrusion are made for industry, and you can always get a larger beam or a more powerful motor. [James] is going in the opposite direction. He’s building tiny, half-scale printers. They’re small, they’re adorable, and they have design challenges all their own.
At this year’s New York Maker Faire, [James] is showing off his continuing project of building baby 3D printers. He has a half-scale wooden Printrbot, a half-ish scale Mendel Max, a tiny Makerbot Replicator, and a baby delta and baby Ultimaker in the works.
Click past the break for a gallery, and more info on [James’s] tiny creations.
Continue reading “The Tiny 3D Printers Of Maker Faire”
The Printrbot Simple Metal is a good 3D printer, with a few qualifications. More accurately, the Printrbot Simple Metal is a good first 3D printer. It’s robust, takes a beating, can produce high-quality prints, and is a great introduction to 3D printing for just $600. There are limitations to the Printbot Simple Metal, the most important is the relatively small 150mm cubed build volume.
[ken.do] wanted to print large parts, specifically scale aircraft wings and panels. While the Printrbot can’t handle these things normally, the design of the printer does lend itself to increasing the size of the build volume to 500mm long and 500mm high.
Increasing the build height on the Printrbot is as simple as adding two longer smooth rods and a single threaded rod to the Z axis. Increasing the X axis is a bit trickier: it requires a very flat sheet that doesn’t warp or bend over 500 mm, even when it’s being supported in different places. [ken.do] is engineering stiffness into a build plate here. The solution to a huge bed is a two kilogram aluminum bed supported by heavier rails and riding on a massive printed bushing block. Does it work? Sure does.
If you want to print tall objects, the current crop of 3D printers has you covered: just get a delta, and you’re limited only by the length of the extrusion used in the body. Creating big objects in all three dimensions is a marginally solved problem – just get a big printer. Big printers have drawbacks, notably the incredible power requirements for a huge heated build plate.
The ability to print long objects is a problem that’s usually not addressed with either commercial 3D printers or RepRaps. We’re glad to see someone has finally realized the limitations of the current crop of 3D printers and has come up with a way to turn a very good first printer into something that solves a problem not covered by other 3D printers.
If you are like us, you tend to do your 3D printing with plastic or maybe–if you are lucky enough to have access to an expensive printer–metal. [Adam Feinberg] and his team at Carnegie Mellon print with flesh. Well, sort of. Printing biomaterials is a burgeoning research area. However, printing material that is like soft tissue has been challenging. In a recent paper, [Feinberg] and company outline a method called FRESH. FRESH uses a modified MakerBot or Printrbot Jr. printer to deposit hydrogel into a gelatin slurry support bath. The gelatin holds the shape of the object until printing is complete, at which point it can be removed with heat. If you don’t want to wade through the jargon in the actual paper, the journal Science has a good overview (and see their video below).
The gelatin is mixed with calcium chloride and gelled for 12 hours at low temperature. It was then turned into a slurry using an off-the-shelf consumer-grade blender. A centrifuge was used to remove most of the soluble gelatin. Printing inks were made with materials like collagen and fibrin. The FRESH process actually uses liquid ink that gels in the gelatin.
The printer uses an open source syringe extruder found on the NIH 3D print exchange (they never say exactly which one, though and we had trouble matching it from the pictures). In true hacker fashion, the printer prints its own syringe extruder using the stock one from ABS and PLA plastic. Then you simply replace the standard extruder with the newly printed one (reusing the stock stepper motor).
The paper describes printing items including a model of a 5-day-old embryonic chick heart, an artery, and a miniature human brain model. Another team of researchers in Florida have a similar system, as well.
We’ve talked about bioprinting before and even mentioned how to make your own inkjet-based bioprinter. The FRESH method looks like it is in reach of the hacker’s 3D printing workshop. We cringe to think what you will print when you can finally print body parts.
Continue reading “Printing Soft Body Tissue”
We’ve seen a lot of experimenting with 3D printers over the years, and that is a good thing. However, [Tyler] has had a bad experience with experimenting. He has a Printrbot Simple Metal and decided to try nylon weed wacker line. Since he wanted to get straight to printing, he skipped the apparently important step of drying the trimmer line before printing. This experimentation ended in several clogged nozzles. Removing and cleaning the nozzle several times put undo stress on the Ubis hot end wires and they broke. Things were not going well.
In an effort to make his printer more repairable, [Tyler] ordered up an aluminum RepRap heater block, heating resistor and thermistor. The heater block was tapped with standard M6 threads but the Ubis was 1/4 inch. This was remedied by drilling and tapping the M6 hole to 1/4-20.
Now for the nozzles, [Tyler] bought a handful of cheap brass acorn nuts. He drilled a hole for the molten plastic to exit the nozzle, then used a Dremel to grind the acorn nut’s dome into a cone. He reports it only took him about 5 minutes per nozzle.
It looks like [Tyler] got back to printing with a little creative thinking. Unfortunately, the Ubis and J-Head hot ends are not interchangeable. A couple of other ex-Ubis users have made J-Head adapters for their Printrbots.