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Superjolly bearing replacement Part 2: Alignment
Note: This post is intended to serve as a somewhat generic reference for different ways to both fix and check alignment on flat burr grinders, but may not apply to all grinder designs. If my Frankenjolly were just a filter grinder, this story would probably have ended at Part 1. But I got Franken first…
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Superjolly bearing replacement Part 1: The Bearing
A Mazzer Superjolly is infamous for being built like a tank. After ages of use in a cafe, however, and having been through the hands of at least two people before it came in my possession, it’s reasonable to assume that some mobile parts of my Frankenjolly will need replacement. One fine day When you…
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My Current Refractometry Workflow
It’s an exciting time to be data driven in coffee. A little more than a decade ago a coffee refractometer would set you back 700 USD and here we are where devices are entering the market at a quarter of that price. Price had always been a barrier to entry in coffee refractometry but now…
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Wet-WDT (WWDT) for Coarse-grind Percolation
Note that Lance Hedrick gets credit for recommending this technique. Lance was doing WWDT almost a year before this technique started getting talked about by other coffee content creators. This post also leans heavily on the concept of fines migration as described by Jonathan Gagné in his book “The Physics of Filter Coffee”. Some of…
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Temperature gradient across an espresso puck
I sometimes think the concept of espresso exists to trick us into thinking that perfection can exist, only to have reality handed to us on a plate to humble us. That’s the best way I can summarize the events that led to this post. As the photo above might tell you, I stuck a temperature…
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The Case for Turbos
Disclaimer: I have literally zero idea how to run a cafe. The series of questions I pose below are simply an attempt to make the reader question their understanding of espresso. Have you tried a fifteen second shot? If no, why not? If the why is “because everyone says 30 seconds”, have you broken the…
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Birth of Turbobloom and Extractamundo!
EDIT: Yang Luo kindly translated this post to Chinese and can be accessed here. When Cameron et. al. released their peer-reviewed paper on turbo shots, it kinda took the espresso world by storm. It was controversial in a very interesting sense. The science behind it (by the standards of a lot of coffee literature) was…
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SSP-MP 64mm burrs in The Frankenjolly
A problematic thing about being involved in discussions with DE1 owners is that you are bound to have a lot of FOMO. The shiniest and latest is always on display and there’s always the question of whether or not you’re getting “the best possible”. The “what” of “the best possible” can be anything from the…
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DE1 Teflon Grouphead Shower Upgrade
A while ago, Ricco (officially the nicest person in the Decent user community), reached out to me saying he heard from John Buckman (Decent’s owner) about prototype teflon grouphead shower parts being available for purchase. This is significant in a number of ways. On the surface, as written by Decent’s official channel, the pieces theoretically…
Pocket Science Coffee
Amateur sciencey coffee talk
Pocket Science Coffee 