/ck/ - Food & Cooking

>>18758784
> PSD charts for the grinder with various common burr sets involved
I don't think you understand what that would entail. When you see a particle distribution graph, its from a single coffee at a single burr gap at a single roast level at a single rpm at a random humidity, with an unknown alignment. Do you want the same coffee pulled at every single tickmark at every single rpm from 400-700 on every burr that fits on coffees of different roast levels of different origin, density, and processing method?
>anyone have actual PSD charts for some of the so-called "endgame" grinders
If you ask Denis from Kafatek about this he bans you from buying his grinders. Denis started machining his own burrs because of the random changes and inconsistencies from the burrs he was purchasing from ssp and mazzer.
>current setup is allegedly making about 33% fines
We're not doing this again. Buy a df64 and a random set off ssp and fuck off.
>>18758789
Its measuring the radial runout("wobble") of the shaft that rotates the burr. If your rotating burr carrier is wobbling in and out, its going to produce a different distribution than one that's not wobbling. One of the big criticisms of the Weber key is the long shaft thats more prone to wobble than the short one of on the wug. Hard to keep that wobble consistent from grinder to grinder when a random chinese factory is pumping out thousands of units for Breville or Oxo. That wobble is entirely separate from how parallel my burrs are aligned, or how consistent the burrs are to the set the graph you want was made off of. That's the video they sent of my actual unit. Looks to me like 0.012mm of wobble. Its literally 3 engineers in hong kong making the highest quality shit they can. I'm pretty sure kafatek is the same way, <5 guys in seattle cranking out units in small batches. I'd like to get my hands on some of their burrs but you have to have proof of ownership of a grinder to buy them.

>>18350767
Oh also precision machining costs money and when you're trying to keep your burrs aligned at a 200micron gap while coffee beans are slamming them apart, you don't really want any slop. I learned a new term when I was reading about all this shit last year. Apparently the kafatek guy started machining his own burrs after he got pissed at SSP for not being consistent.
>Metrology: the science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology