Most of our beloved tools, such as Slic3r, Cura or KISSlicer, offer scripting interfaces that help a great deal if your existing 3D printing toolchain has yet to learn how to produce decent results with a five headed thermoplastic spitting hydra. Using scripts, it’s possible to tweak the little bits it takes to get great results, inserting wipe or prime towers and purge moves on the fly, and if your setup requires it, also control additional servos and solenoids for the flamethrowers.
This article gives you a short introduction in how to post-process G-code using Perl and Slic3r. Perl Ninja skills are not required. Slic3r plays well with pretty much any scripting language that produces executables, so if you’re reluctant to use Perl, you’ll probably be able to replicate most of the steps in your favorite language.
Continue reading “3D Printering: G-Code Post Processing With Perl”
There are a few 32-bit ARM-based 3D printer controller boards out there such as the Smoothieboard, the Azteeg X5 mini, [Traumflug]’s Gen5 electronics, whatever board is in the Monoprice MP Mini Select, and several others I will be criticized for not mentioning. All of these ARM boards provide smoother acceleration, better control, and ultimately better prints from whatever 3D printer they’re controlling. Now, out of the blue, there’s a new board. It’s an evaluation board from ST — much like those famous Discovery boards — that sells itself as a plug and play solution for 3D printers.
The heart of this board is an STM32F401 — not the king of the STM32 line or the fastest ARM microcontroller, but anything faster or more capable will add considerably more to the BOM for this board. This controller board features six of ST’s L6474 motor drivers with enough current for some beefy NEMA 23 stepper motors , a multi-zone heated bed, and connections for a WiFi module and external LCD and keypad. You can buy this board right now for $118. This board isn’t a game changer, but it is evidence the game has been changed.
As with all 3D printer controller boards, there are a few aspects that will leave users wanting more. This is a board meant for 12V heaters (except for the bed, which has a 24V, 20A output), and the stepper drivers can only go up to 16 microsteps. That said, there’s not much else to complain about. This offering comes with a 32-bit firmware called Marlin4ST. From a quick perusal, it looks like the familiar configuration.h is still there, and still does what it’s supposed to do.
This ST Discovery board is extremely capable, available now, and relatively cheap, but that’s not really the big story here. What this board represents is a reference design and working firmware for a 32-bit ARM-based printer controller. That’s the future, and with this board the future might come a little sooner.
Thanks [jagerboots] for sending this one in.
3D printers are celebrated for their capacity to replace missing or broken parts. How about an entire T-62 tank?
Now hold on a second — this is only a model replica. It is, however another expression of the myriad uses for 3D printers. Designed in Maya and requiring almost three weeks to print all 62 parts from about 70 meters of PLA filament. The assembly is not terribly involved, made easier by printing a few large sections such as the crew section and hull while the parts don’t get much smaller than the turret hatches. Nonetheless, he final product is about as true to life as you can get when designing the parts from scratch.
Continue reading “Soviet-Era Tank Gets The 3D Printed Treatment”
3D Printering: the final frontier. These are the voyages of another 3D printer hack. Its mission: to explore strange new ways of leveling a print bed.
So far, we’ve had servo probes, Allen key probes, Z-sled probes, inductive and capacitive contactless switches, just to name a few. All of them allow a 3D printer to probe its print bed, calculate a correction plane or mesh, and compensate for its own inherent, time variant, inaccuracies.
Continue reading “Sonic 3D Printer Auto Bed Leveling Makes a Swoosh”
The launch of Pokemon Go has unleashed the franchise upon the world once again but this time it’s encouraging users to get active and socialize in the great outdoors. To show off their dedication to the cause, [Npoole] 3D printed a Pokédex external battery and case to combat the game’s already legendary drain on their Galaxy S4’s resources.
Mimicking the first-generation Kanto design, [Npoole] 3D printed it in red ABS and added a small circuit with a red, yellow and green LED to complete the effect. Inside, a 18650 lithium cell provides the much-needed backup power via a micro B plug and is boosted to 5V with a LiPo charger/booster board. Despite a switch on the circuit, the battery slowly drains so that’s something to be corrected in a future version.
As you can see, there is still some room left over in the external bat–I mean–Pokédex, and [Npoole] intends to add another battery and a cooling fan to further improve the design. The result is a little bulky, but for new and diehard fans alike, a working Pokédex definitely worth it.
While that’s printing, if you’re looking to hack your way to the perfect Poké-ball throw, try out this lo-tech addition to your Pokémon trainer kit.
Today, your average desktop 3D printer is a mess of belts, leadscrews, and pulleys. For his Hackaday Prize entry, [DeepSOIC] is eliminating them entirely. How’s he doing this? With a linear stepper motor.
Search Google for ‘linear stepper motor’ and you’ll find a bunch of NEMA-bodied motors with leadscrews down the middle. This is not a linear stepper motor. This is a stepper motor with a leadscrew down the middle. The motor [DeepSOIC] has in mind is more like a mashup of a rack gear and a maglev train. The ‘linear’ part of this motor is a track of magnets perpendicular to the axis of the motor, with alternating polarities. The ‘motor’ part of this motor is a carriage with two field windings. It’s an unrolled stepper motor, basically, and could run a 3D printer much faster without as much slop and backlash.
Right now [DeepSOIC] is in the experimental phase, and he had a plan to print the axis of his linear stepper in ferromagnetic filament. This did not work well. The steel found in electric motors has a magnetic permeability of about 4000, while the magnetic permeability of his brand of ferromagnetic filament is about 2. Even if the idea of printing part of a motor was a complete failure, it was a great success at characterizing the properties of a magnetic 3D printing filament. That makes it a great entry for the Hackaday Prize, and a perfect example of what we’re looking for in the Citizen Science portion of the Prize.
This time last year, Stratasys, parent company of Makerbot, was implicated in a class action suit. Investors claimed Stratasys violated securities laws, and overstated both the performance of the 5th generation of Makerbot printers and the performance of the company itself. Court docs received by Adafruit have revealed this case has been dismissed with prejudice. Makerbot won this one.
The case presented by Stratasys investors relied on two obvious facts. First, the price of Stratasys shares fell far beyond expectations. Second, the extruder for the 5th generation of Makerbot printers – the ‘Smart Extruder’ – was terrible. No one can reasonably dispute these claims; shares of SYSS fell from $120 in September of 2014 to $30 in September of 2015. With many returns to handle, Makerbot quickly redesigned the Smart Extruder.
Both of these indisputable facts are in stark contrast to statements made by Stratasys and Makerbot at the time. In a press release for the 4th quarter 2013 financial results, Stratasys’ expected sales to grow at least 25% over 2013 and stated it was experiencing “strong sales” of its desktop 3D printer. Concerning the Smart Extruder, Makerbot stated this new feature of the 5th generation Makerbots would make them easy to use, and “define the new standard for quality and reliability.”
The facts of this case are not in dispute – Stratasys did not see the growth they expected in late 2013. The Smart Extruder certainly did not make printers more reliable. These facts, however, are not sufficient to violate securities law. In a wonderful legal turn of phrase, the judge deciding this case called the statements about the quality of the 5th generation Makerbots consisted of, “non-actionable puffery,” and a ‘statement so vague and such obvious hyperbole than no reasonable investor would rely on them.’
Statements made by Stratasys on their financial performance were also found not to be sufficient to violate securities laws. Stratasys did make several statements about negative performance in late 2014 and 2015, and positive statements made earlier did not have an intent to deceive investors.
This is good news for Makerbot. The claims brought by investors in this case had little merit. The case cannot be appealed, and Stratasys is no longer facing a class action suit. Does this news actually matter? Not really; Makerbot is a dead man walking, and 2016 sales will be at levels not seen since 2010 or 2011.
The consumer 3D printing industry is booming, despite the Makerbot bellwether though.