Kopi Deva

powderhorn

these are my settings.

I grind Espresso between 6.2 and 6.6.

This worked from the first grind. Do you tighten the thumb screw to lock the burrs?

Or maybe the burr touching point is noted incorrect. Check your actual burr touching point this way:

Turn on the KOPI Deva, and press the start/stop button. Select the slowest burr speed using the RPM Dial. Loosen the thumb screw, and rotate the upper burr carrier towards FINE until you can hear the burrs touch (a chirping sound). Press the start/stop button to stop the burrs, and turn off the KOPI Deva using the power switch. Note the grind setting at which this happens.

Contacting the Deva team should be usefull anyways.

Update: I took off the funnel and cleaned the insides, and took off the bottom burr and cleaned it and the top. Inside he funnel were lots of grinds, but burrs seemed ok. So, starting with a clean machine, I ground 18g of French Roast (dark, fresh, a bit oily) on medium speed (i think a couple of you smelled this out as contributing factor).

On 6.5 setting, i got 14.5g out. So i took off the funnel again. and there it was, my missing 3.5 grams. I brushed that out into the dosing cup, packed a filter, and brewed a cup. I got to say, damn, that was good. Big step up. And still room to improve, 6.4 would be better I’ll bet (it brewed in 24-25 sec). Still enjoying now as I write. But anyway, I gotta fix this wiper issue, i can’t be bothered to take the funnel off every time.

hm, that looks quite different from mine, which is very clean with no grounds sticking to the burrs and nothing left in the funnel. 2 sprays RDT 17 in 17 out 9 of 10 times.

maybe your beans are a bit oily for grinding in?

Just as mackarel I also get same output as input 9 times out of 10 but to get everything out I do need to do some start/stop or decrease/increase rpm, how many timees usually depends on rpm.

i grind at 800 rpm most of the time and after turning the grinder off most of the remaining grounds fall out. Repeating on/off brings out the rest and i do it one more time just to make sure, but that wouldn’t even be neccessary.

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.

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?

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.

Tjyven Wow! That’s impressive.

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.

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?