The Mug Marker is a Don McRae's cardboard mug-decorating robot that uses an Eggbot-style EBB controller board and stepper motors to draw precise patterns on your favorite coffee-mug. Lenore from Evil Mad Scientists has a writeup on the design process and the way it performs.
Much like the Mug Plotter on Instructables, it uses the same EBB controller board and stepper motors as the Eggbot, but with linear motion for the pen instead of rotation. However, unlike that version, Don has incorporated the same winch-drive mechanism that we use on the WaterColorBot to provide motion for the linear axis– meaning that it can go fast or slow, with very good accuracy.
Don laser cut the large white winch on the back of the machine from acrylic. It controls a string that pulls the pen carriage back and forth as it rides on a pair of rods.
The pen holder itself slides into some additional bearings, and has a small protrusion on the back that rests on the servo horn, allowing it to be lifted up or lowered down. Like the Eggbot’s pen-lift mechanism, this mechanism only (actively) lifts the pen, which means that it can ride over uneven surfaces, or plot on mugs with variable diameter.
The Mug Marker
This/next week, I’m speaking in events in Park City, Utah (Future in Review); Boston (The Freedom to Innovate Summit, the Berman Center and Suffolk University); Toronto (Seneca College); Markham (In Conversation and Storytellers); and the University of Waterloo! Come say hi! (Image: Terri Oda, CC-BY)
When I was a kid, I was terrified of farting in class. At home, it was no big deal: it was a daily fart festival with my family. But at school? TOTAL FEAR OF FLATULENCE. But then it dawned on me: EVERYBODY FARTS. And that’s one of the reasons why I’ve decided to write a graphic novel about how our bodies work. It’s about all the stuff that goes on inside our bodies daily, or throughout our lives, and that this stuff – whether it’s digestion, or respiration, or defecation – is necessary for us to live. And it gives you excellent come-back material if anyone teases you for farting in school!
Alan Turing and the codebreakers of Bletchley Park invented modern crypto and computers in the course of breaking Enigma ciphers, the codes that Axis powers created with repurposed Enigma Machines — sophisticated (for the day) encryption tools invented for the banking industry — to keep the Allies from listening in on their communications.
The Lytro Illum dares to be different, boasting even more robust features than its first generation predecessor and a sleek design reminiscent of professional DSLRs. What’s so cool about it? Most cameras capture the position of light rays, producing a statoc 2D image.
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