A Grinder PSA.I know James Hoffmann, in a few videos now, heavily suggests doing the RDT (ross droplet technique) on coffee in single dose grinders; indeed, in one video, he heavily suggests doing this 3x as much to get, as he says 'better anti static ...
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A Grinder PSA.
I know James Hoffmann, in a few videos now, heavily suggests doing the RDT (ross droplet technique) on coffee in single dose grinders; indeed, in one video, he heavily suggests doing this 3x as much to get, as he says 'better anti static results". He even demos it on a DF64 Gen 2 in his Best grinders under £500.
But he's wrong. At least with grinders equipped with a plasma generator.
I don't mean the RDT isn't a valuable tool in your single dosing grinder arsenal; but it interferes with plasma coils, causing more issues than advantages.
Doing the RDT on grinders with a plasma generator (like the DF64 Gen 2) WILL GUM UP the works inside around the plasma coil, making it 100% ineffective, and increase the overall static issues.
Don't RDT any grinder with a plasma coil.
Got this direct from TWO grinder manufacturers. I've been told one is trying to get James to do a new video "recanting" the advice. It's causing them a lot of service calls.
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@coffeegeek @coffee @espresso
You'd think you know you have an antistatic device since your grounds aren't clingy in the first place.Doing RDT in winter with my grinder makes such a major difference it's not even funny (summer is really humid, and RDT isn't necessary).
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@jannem yes, which is why I thought it particularly odd he spritzed the coffee (he says in the video he did, but doesn't show doing it) he put into the DF64 Gen 2 in the Espresso Grinders Under 500 vid.
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@coffeegeek @jannem can you call it an antistatic device, if it's not stopping the grounds from clinging? If it did not do its job in the first place, who cares if it's gummed up or not
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@jannem The main vid at least one manufacturer is upset with is the one where he says do it 2-3x as much:
The manufacturer has dealt with literally 100s (according to them) service calls and emails over plasma coils "failing". They figured out it was all the RDT ppl were doing, and increasing it because of Hoff's vid.
Good news is, it's easily fixed: just heavily brush (with a very soft brush) the chute and coil.
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Not sure you understood?
The plasma coil gets gummed up, and no longer works (ie no charge pushed out). Cleaning it off of the built up, clinging on ground coffee (which adheres because of the unexpected moisture) brings the coils back to life. And the grinder once again is reducing static via the active plasma coil. -
@coffeegeek @jannem From reviews I have seen, people usually say it does not work out of the box (I think James himself said that). That was my point. If a feature doesn't work, why care if it gets destroyed by water or not
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@normis @jannem I'd like to see the video where James says that about plasma coil equipped grinders. Please share which one?
i've tested 3 so far myself, and all worked as advertised, out of the box. Even here in winter, where I have notorious static issues with grinders, the plasma equipped models are way, way better than the ones without.
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he heavily suggests doing this 3x as much to get, as he says 'better anti static results".
That wasn't the point of that video though was it? It was about some science done on EY that suggests over-RDTing leads to higher extractions.
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@coffeegeek @coffee @espresso is this method useful for hand grinders?
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@coffeegeek wait, coffee grinders have plasma generators in them? I know little about coffee but am a plasma physicist, so am curious…
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@coffeegeek @coffee @espresso
As the owner of a cheap plastic-binned coffee grinder, I simply walk away for 15-20 minutes, and the static charge dissipates on its own. -
:mastodonworld: Calebreplied to CoffeeGeek on last edited by
@coffeegeek Sorry for my ignorance. What is a plasma coil? Search results were polluted with references to a type of gun in a video game. Is it related to an ionizer?
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@tedmaul you are correct; I blame my late night typing for the faux pas. He did the video to show it can give higher extractions, as per that science study that came out independently.
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It can, but often, a good knock on the counter can dislodge the static build up stray grounds with manual grinders. I don't RDT manual grinders myself.
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@ezwal yes they do - coils that fire away during the active grinding. the Turin DF64 Gen 2 is one type.
You can also buy kits to add the functionality to existing grinders
https://www.turingrinders.com/products/df83-plasma-generator-kit
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CoffeeGeekreplied to :mastodonworld: Caleb on last edited by
@ccunning yes, both terms are used interchangeably in grinder tech.
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:mastodonworld: Calebreplied to CoffeeGeek on last edited by
@coffeegeek Good to know. I do have periodic issues with my Fellow Ode 2’s ionizer not working, but I’ve never used the RDT with it before ¯\_(ツ)_/¯
Lightly brushing out the chute has resolved it thus far, but I have wondered if it’s something I should be concerned about. Especially while it’s still under warranty…
