Mini Delta 3D Printer in Action at the Monoprice Booth

When I was at Bay Area Maker Faire a few weekends ago I stopped by the Monoprice booth to chat with [Chris Apland], their head of 3D Printing. Earlier in the week, the company had just announced preorders for their new $169 delta-style 3D printer called the MP Mini Delta.

[Brian Benchoff] covered that launch and I don’t have a lot of details about the machine itself to add. I saw it in action, printing tiny waving cat models. The stock printer can use ABS or PLA and has a build volume of 110mm in diameter and 120mm tall and these preorder units (being sold through Indegogo) will begin shipping in August.

What was of interest is to hear the shipping estimates the Monoprice team is throwing around. Chris told me that their conservative estimate is that 20,000 of these printers will ship through this preorder, but he is optimistic that by the end of the fourth quarter they’ll be closer to 100,000 units. That is incredible.

Part of the promise here is the out of the box functionality; [Chris] mentioned having a printed cat in your hands within 5 minutes. If it can actually do that without the need for setup and calibration that’s impressive. But I know that even seasoned printing veterans are interested in seeing how fast they can run this tiny delta and still turn out quality prints.

You’ll find the video interview after the break.

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The Tiko Printer: What Happens When You Innovate Too Much

Sometime in the very distant future, the Universe will become the domain of black holes. Energy and entropy will be compressed into minuscule quantum fluctuations. Even in this domain of nothingness, there will still be one unassailable truth: you should not buy a 3D printer on Kickstarter.

We’re no strangers to failed 3D printer crowdfunding campaigns. Around this time last year, backers for the Peachy Printer, an inordinately innovative resin printer, found out they were getting a timeshare in Canada instead of a printer. This was unusual not because a crowdfunding campaign failed, but because we know what actually happened. It’s rare to get the inside story, and the Peachy Printer did not disappoint.

For the last few months, we’ve been watching another crowdfunding campaign on its long walk to the gallows. The Tiko 3D printer is another 3D printer that looks innovative, and at the time of the crowdfunding campaign, the price couldn’t be beat. For just $179 USD, the backers of the Tiko printer would receive a 3D printer. Keep in mind the Tiko launched nearly two years ago, when a bargain-basement printer still cost about $400. Fools and money, or something like that, and the Tiko 3D printer campaign garnered almost three million dollars in pledges.

Now, after almost two years of development, Tiko is closing up shop. In an update posted to the Tiko Kickstarter this week, Tiko announced they are laying off their team and winding down operations. It’s a sad but almost predictable end to a project that could have been cool. Unlike so many other failed crowdfunding campaigns, Tiko has given us a post-mortum on their campaign. This is how the Tiko became a standout success on Kickstarter, how it failed, and is an excellent example of the difference between building one of something and building ten thousand.

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CES2017: Monoprice Unveils Expanded Line of 3D Printers

At CES last year, Monoprice introduced a $200 3D printer. Initial expectations of this printer were middling. My curiosity got the best of me, and last summer I picked up one of these printers for a review. The Monoprice MP Select Mini is actually phenomenal, and not just ‘phenomenal for the price’. This machine showed the world how good one of the cheapest printers can be. The future is looking awesome.

You might think Monoprice wouldn’t be able to top the success of this great little machine. You would be wrong. This week, Monoprice announced a bevy of new and upgraded printers. Some are resin. Some are huge. One will sell for $150 USD.

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A Crash Sensor For Delta 3D Printers

It doesn’t happen that often, but this is the last time that [Lucas] comes back from hours of unattended 3D printing to find a large portion of plastic spaghetti mess and a partly disassembled Kossel. The crash sensor he designed will now safely halt the printer if it detects that something went wrong during the print.

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NYC MakerFaire: A Really, Really Big Printer

Walk in to the science center at Maker Faire this year, and the first thing you’ll see is a gargantuan assemblage of aluminum extrusion spitting out molten plastic for one of the biggest 3D prints you’ve ever seen. It’s SeeMeCNC’s PartDaddy, a 16-foot tall 3D printer with a four foot diameter build plate.

The printer doesn’t extrude filament. Instead, this printer sucks up PLA pellets and extrudes them with a modified injection mold press mounted to a delta printer frame. That’s a 4mm nozzle squirting plastic. The heater for the extruder is 110 V, and the NEMA32 motors are controlled with 72V drivers. Everything about this is huge, and it’s surprisingly fast; a single-wall vase grew by about two feet in as many hours. We have no idea how fast a solid print can be completed, although the SeeMeCNC guys will probably find out later this weekend.

SeeMeCNC also had a neat little resin printer with an impossibly clever name on display. We’ll get a post up on that later this weekend.

DSLR Gives Exposure to 3D Light Traces

light lion

We’ve all twirled sparklers around in the darkness to write fleeting circles and figure eights with the light they give. Some of us have done it with the glowing end of a cigarette, too. Hackaday Projects user [ekaggrat] went a step further, painting with an LED mounted on the print head of his newly built 3DR Delta and capturing the LED’s path with a DSLR camera set for long exposure.

He started by creating a mesh model. From there, he converted it slices and G-code in Grasshopper. The LED is connected to pin D11/servo pin 1 on the RAMPS board. [ekaggrat] used the M42 G-code extension toggle the pin and write the slice lines with light. He has future plans to use an RGB LED, and we hope he shares that on the Projects site as well.

While this isn’t the most advanced light painting setup we’ve seen, it’s still pretty awesome and far more accessible. There is more information on his site, and you can grab the G-code from his repo. Stick around to see a video of the process.

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Ask Hackaday: Auto Bed Leveling And High Temperature Force Sensitive Resistors


[Johann] over on the RepRap wiki has an ingenious solution for making sure a borosilicate glass bed is completely level before printing anything on his Kossel printer: take three force sensitive resistors, put them under the build platform, and wire them in parallel, and connect them to a thermistor input on an electronics board. The calibration is simply a bit of code in the Marlin firmware that touches the nozzle to the bed until the thermistor input maxes out. When it does, the firmware knows the print head has zeroed out and can calculate the precise position and tilt of the bed.

Great, huh? A solution to bed leveling that doesn’t require a Z-probe, uses minimal (and cheap) hardware, and can be retrofitted into just about any existing printer. There’s a problem, though: these force sensitive resistors are only good to 70° C, making the whole setup unusable for anything with a heated bed. Your challenge: figure out a way to use this trick with a heated bed.

The force sensitive resistors used – here’s a link provided by [Johann] – have a maximum operating temperature of 70° C, while the bed temperature when printing with ABS is around 130° C. The FSRs are sensitive to temperature, as well, making this a very interesting problem.

Anyone with any ideas is welcome to comment here, on the RepRap forums, the IRC, or anywhere else. One idea includes putting an FSR in the x carriage, but we’re thinking some sort of specialized heat sink underneath the bed and on top of the FSRs would be a better solution.

Video of the auto bed leveling trick in action below.

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