ez4prez well the campaign has closed so a refund/cancellation isn’t guaranteed. you’ll have to ask them directly and wait upon a decision.
Kopi Deva
mackerel I agree and the criticism is somewhat amusing, too. “The grinder sounds like a$$ when running..” which begs the question, what is the best a grinder could sound? No sound at all? Now that would be cool. A few folks have mentioned the grinder is pretty quiet which would be a benefit.
The Deva indeed is very quiet. I wonder how they would describe the sound of the Sette 270 :)
Sounded fine in the video… I even think the funnel is good in that it’s easier to clean than most grinders’ chutes. The point about beans sticking still concerns me though. Just don’t wet the beans? But the creator does it in many of the demo videos…
Do you wet your beans before feeding @mackerel ?
From a previous user of a sette 270 and a current owner of a niche… the deva is just delicious to use.
Hell… I am single dosing 72g each batch at work. Basically keep feeding the little sucker until you empty your cup and never had beans sticking inside even with RDT.
I am starting to think people basically immerse their beans in a cup of water prior to grinding them.
those complaints seem rather made up to an actual user of the Deva.
Can’t take that serious.
Hmm very tempted to enquire about the discord user’s offer to sell now… especially with p64’s being hard to find used and having long lead times…
Person considering selling lives in the SF Bay Area of California and goes by discord handle baleong#2299, but if you’re in the UK that might not work. They also prefer their P64 which they readily admit is 2x the price. So go figure.
Frankly, I’m not sure what to make of these wildly divergent opinions. Ugh. Maybe I’ll just keep my order and if I wind up in the camp of people who aren’t thrilled with it, then resell it. But I certainly hope for my sake that I’m as delighted as you all are.
I have the Lagom P64 at almost 3x the price of the Kopi Deva.
Anyone here have the espresso kit add-on? If so, any thoughts on it. I figured the dosing cup would be adequate but now thinking I might ask if I could add the espresso kit.
spivechild And how would you compare the two?
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One thing I would say is that one of the users having issues on discord is borrowing it and I think people are more likely to be forthcoming with issues in that situation. Not saying you guys are but it’s easy to talk yourself into thinking everything is fine when you’ve invested a lot of money in something.
I’m trying to understand the explanation for why the coffee doesn’t drop until the end That can’t be a good thing for retention right?
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The different pressure is built up on purpose and when you stop grinding it releases and takes the remaining grounds with it. As you can see in the video most of the grounds fall out while grinding.
No idea what is so difficult to understand. No need for bellows with the Deva and that is a great thing in terms of looks and operation.
Guy just seems to not have informed himself in regards of how the Deva works and blames his own errors on the design of the grinder.
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mackerel if there’s an intentional pressure difference then that means that suction is holding the grounds in place, correct (but surely impossible)? Or basically, if it’s simple to explain, can you explain how this differential is created and why it does what it does please?
I mean, the guy is using rdt as per the manufacturers instructions, what are you implying he’s doing wrong?
nah, not spending more time on this nonsense, sry.
The grinder is working the way it should be. End of story.
Move on, buy a different grinder. No problem.
Hmm let’s see here. 18.4 in and 18.4 out and with rdt too.
Given my country humidity is practically always high, i don’t RDT.
Once you familiarise yourself to the work flow, there is practically zero retention.
The higher RPM will cause a higher differentiate pressure difference holding more grounds in the funnel, however most of the it falls upon turning off the grinder. Usually for higher RPM, i will start/stop the grinder once or twice to allow for the last few 0.1 g of coffee to fall. The additional step is not needed at lower RPM say 600 and below.
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Newdent if there’s an intentional pressure difference then that means that suction is holding the grounds in place, correct (but surely impossible)? Or basically, if it’s simple to explain, can you explain how this differential is created and why it does what it does please?
mackerel nah, not spending more time on this nonsense, sry.
Newdent it’s easy to talk yourself into thinking everything is fine when you’ve invested a lot of money in something.
No intention to offend anyone, but as someone just following this thread, the above is what I see. The Deva may or may not be a fantastic grinder, but some of the claims made - just as for other products - simply do not stack up with physics, or if they do they deserve a clear explanation (not necessarily by forum members, but I found none on the Kopi Concepts website). They say:
Our patent pending design creates a small pressure difference between the burr chamber and the exit chute, encouraging air flow through the grind path to help the pursuit of zero retention. [Kopi’s emphasis]
While there is a resemblance between the shape (at least the exterior one) of the Deva and that of an expansion exhaust for a 2-stroke engine (which does have the effect Kopi mention… in an engine), I respectfully am very sceptical that the same pressure phenomena (scavenging) observed in a fairly homogeneous gas moving in laminar fashion at speeds of several tens m/s, propelled by temperature differences of several hundreds K and pressures of tens of bar, apply to a highly disorganised “fluid” comprised of coffee beans at various states of grind and air, moving chaotically at a few mm/sec down a chute, propelled by gravity. Yes, it’s patent pending, rather than patented, which could explain some caution in disclosing the “secret ingredient” - then again, it may be patent pending because it’s basically unpatentable.
ETA: If the ‘pressure differential’ isn’t generated by the shape of the grind path (which is my assumption here), Kopi doesn’t explain what it’s due to. All the descriptions above are consistent with behaviour I observe in commercial grinders (Mazzer and Ceado), that certainly do not make claims about pressure differentials holding the grounds up.