Sorry to hear you’re having issues, not what you expect when you pay this much for a grinder. If you’re drinking those dark beans a niche would have served you better I think. Mine was flawless when I owned it. Glad I passed up on the kopi and ordered a P64 😬.

Thanks all for your replies, appreciate all the advice and support. I have spent a LOT of time and a lot of beans (2kg) on this, and am not making any progress. Have checked touch point (thanks @mackerel), have tried it clean, have tried it not cleaned, with RDT, without RDT, etc. etc. It works fine at about 8.5 and up. If it’s clean, I get about a 1g of retention, but after a couple grinds to coat the insides, I then do get close to 0 retention. No matter what, the inside of the funnel is coated like this:

It just won’t grind @ less than 7 (at 7 at medium speed it takes about 60 seconds). The grind might suitable for a pour over, but no way can you make espresso. I have only tried dark roast, which is what I like. Maybe it would be different with a lighter roast. Have reached out to Kopi for help, but i guess they’re all on holiday still. They have been great responding, up till now. Hopefully they will have some advice. Meanwhile, same beans through my old grinder, a rocky rancilio (18 yr old), still brews a fine cup. But have been waiting over a year for this Deva to replace it. Enjoy the weekend.

Really feel for you, but it seems yours is an exception to others who seem to be having success with there Deva.

Fingers crossed you will get a replacement unit.

Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

Ok, one more update - did a full clean, even removed the lower burr from the plate (it did not just ‘pop off’ like in the Kopi vid, it was stuck on there as if by glue). Anyway, completely clean, and began again with a Medium Roast. I couldn’t find a light roast on short notice. Re-confirmed the 6.2 touch point. Set to 6.5. Loaded 18g of bean w/two quick sprays. Pressed start, it started grinding right away, and was pretty consistent throughout the grind on medium speed. I got 14.5g out. Reloaded, and got 17g out. Reloaded and got my 18g. Ran 3 more 18g loads through, consistently got 18g out (but there’s 4-5g of grinds in there somewhere).

6.5 tuned out to be a bit too fine for these beans. Pulled another at 6.6 it was smooth, clear, a decent pull, but hard to evaluate since this is the first time I ever tasted these beans.

So, it’s consistently working well enough now, with these Medium Roast beans. I will let it ride with these beans until I am out before trying the dark again. Cheers!

    Did you contact the Deva team?

    powderhorn Something still seems wrong with your machine, even though there probably is some leftovers in my machine too (havent checked) I weigh my coffee everytime and as I said earlier 9 times out of 10 I get the same output and 1 out of 10 maybe 0.1g less. For my machine the touching point is 1.9 and for the espresso I am brewing at the moment I have it set to 3.4 and was about the same with my last beans too. Both those beans are little darker than medium I would say. I am using SSP HU.

        Tjyven Something still seems wrong with your machine

        I think it may be helpful if you could share the retention from a clean machine. powderhorn mentioned 3.5g from a clean start. Of course, more after subsequent grinds. Thx

              LMSC - that’s not necessarily a good indication, as the first few grinds on a clean machine will fill up all the nooks and crannies which won’t necessarily come out again. In other words, exchange retention is the key parameter here.

                  MediumRoastSteam Of course, it is not. The thing is something seems different in @powderhorn’s grinder. It will be good to see how much the other users’ grinder retains from a clean machine. I think you get an idea of a delta build up as the user thinks 4-5g are still somewhere in the grinder. I do think this is the one of machine and sure he will get a replacement. :-)

                    Mine was good from the start, with an input of 20g my first five grinds had an output of 19.9, 20.1, 20.0, 20.0, 20.0.

                      LMSC Yes it works really well, the only thing I dont like is that you need to “fiddle” a little to get everything out, I usually need to turn it on/off or decrease/increase the rpm about three to five times to get everything out. Just takes some seconds so not the end of the world but would of course prefer if everything just came out without doing anything.

                        Tjyven

                        that is exactly my experience in terms of retention. I cleaned it once (incl. disassambly of the burrs) after 2 months of use and will never do it again. There was basically nothing i could clean.

                        also i have absolutely no static. maybe i am a fanboy, but i am just impressed with the grinder. It is quiet, has rpm control, very clean and makes good coffee. Imo much better than DF64. P64 level for half the price.

                        I couldn’t be happier. Sad, that @powderhorn doesn’t have the same experience. But he should be able to get it solved with the Deva team. They are very nice to deal with.

                        turning the grinder on/off two to three times is not a big deal for me. much better than having to use bellows.

                          Tjyven Mine was good from the start, with an input of 20g my first five grinds had an output of 19.9, 20.1, 20.0, 20.0, 20.0.

                          LMSC It’s what you will see with quite a few single dose grinders, pretty normal for that scenario. You could see even less variation if the 0.1g scales have a larger accuracy/precision than the units they read in.

                          • LMSC replied to this.

                                So, I reckon it must be the beans, What beans do you all use? I have tried a dark French roast, and a medium Columbian. I take it you all must be drinking lights?

                                • LMSC replied to this.

                                  i drink medium to dark roasts.

                                  MWJB It’s what you will see with quite a few single dose grinders, pretty normal for that scenario.

                                  If f the burrs are set at an angle or something similar to what these users do. Otherwise, if the burrs are set flat, there is going to be some retention when the grinder is run the first time after cleaning. No?

                                  powderhorn While I understand if it happens with darker roasts / French roasts, I won’t expect a medium roast to exhibit this behaviour - not oily and unlikely to stick as much as the dark. I remember some early adopters of Solo DF 64 sharing similar experiences elsewhere.

                                        Only had mine for a few weeks and into my second bag now and both have been in the area om medium to medium dark.

                                        LMSC If f the burrs are set at an angle or something similar to what these users do. Otherwise, if the burrs are set flat, there is going to be some retention when the grinder is run the first time after cleaning. No?

                                        Difficult to say without accurate measurement of that specific grinder.