If you’re like me, you love the taste of espresso, but hate the force required to form a proper puck of grounds to get the best extraction. Tamp unevenly, and you’ll end up with an uneven extraction which will detract from the deliciousness of the espresso. That’s where Roy Eid’s espresso-tamping machine comes in. The whole thing is built around a Parallax Propeller board, and uses a bunch of servos to properly measure and compact the espresso.
Using a custom made keypad, you can choose from three different flavors of coffee (each in its own separate hopper), and whether you want enough for two or four shots. The machine then feeds the grounds into the filter basket, and tamps the grounds using a repurposed inkjet printer cartridge carrier, leaving you with a ready-to-brew puck.
If you’re interested in making a tamping bot of your own, Eid has posted a detailed walkthrough of his process, as well as the source code for the Propeller, on his blog.
Blair Hanley Frank could go for a nice cappuccino right about now.
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