3D Printed Robotic Lawnmower is Like a Roomba for Your Lawn

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csm_DSC01388_1d7b22e3bcIf you’ve ever mowed a lawn, you’re probably familiar with the frustrations that come with lawnmowers. They won’t start, they keep stalling, they somehow get jammed, and when they finally break down altogether, it’s expensive to go out and buy a new one. It’s enough to make you want to give up and just buy a bunch of goats. Or there’s another option: build your own lawnmower. Simple, right? Actually, yes.

Andreas Haeuser has impressed with his 3D printed inventions, which include a wind turbine and solar powered Stirling engine, before. The German engineer’s latest design, the Ardumower, is an automated, robotic lawn mower that zips around the yard and cuts grass by itself, sort of like a Roomba for the lawn. It’s compact, sturdy, and looks to be remarkably effective. All you need to build your own is a 3D printer, some basic electronics, and Haeuser’s detailed instruction manual, which can be downloaded from his website, along with the necessary STL files, for $12.95.

csm_Gimp1858__2__19d2ff00aeThe Ardumower, as its name suggests, is controlled by an Arduino Motorboard and Arduino Uno, which is considered to be one of the easiest microcontroller boards to program and thus ideal for beginners (although it’s well-loved by experienced coders as well). Haeuser emphasizes that he designed the Ardumower to be easy enough for beginners to build, and his construction manual carefully describes and illustrates each step involved in building and programming the electronics.

The mower operates within a boundary wire fence (BWF), which is essentially the same as the invisible fences used to keep dogs in their owners’ yards. It’s driven by two 12V geared motors, which can be powered either by a rechargeable 12V NiMH or 11.1V LiPo battery. It can run for about an hour and a half to two hours before needing to be charged, which, according to Haeuser, should be enough for a typical 500m² lawn. The mower’s height can be adjusted based on the height of the grass, as can the power of the motor.

prusaHaueser prints all of his projects on a MendelMax 1.5 and a Prusa i3.

“These are cheap kit-printers of the first generation,” he says. “This ensures that everyone can replicate my projects.”

Of course, any 3D printer will do, as long as it has a build volume of at least 180 x 180 x 60 mm. The Ardumower consists of 46 separate 3D printed parts, which can then be easily assembled with help from the manual. About 1500 grams of PLA and ABS filament are required, or about a typical roll and a half – not a bad amount at all, really, when you consider what you’re building.

Haeuser, an aeronautical engineer with over 25 years of experience working in the German aerospace industry, has devoted his talents in recent years to designing inexpensive, 3D printable machines that would, under other circumstances, be unaffordable for the average person. As he points out, a typical commercial robotic mower will run you about €600 to €800. He clearly has a particular interest in green technology, too, based on his previous inventions – his 3D printed wind turbine is a fully functional piece of equipment for generating electricity, and his Stirling engine has a lot of potential for purely solar-powered equipment operation. As for the Ardumower, it emits no harmful fumes and won’t stink up your yard with that irritating gasoline smell.

On a purely aesthethic level, the Ardumower is kind of ridiculously adorable, as well, especially when printed in bright colors. Watch it chug along below. Would you have a use for this device? Discuss in the 3D Printed Lawn Mower forum over at 3DPB.com.

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