They started shipping them today. Anybody kickstarted it? ![A zero waste coffee grinder - engineered to the precision of a Formula race car. Literally.](https://ksr-ugc.imgix.net/assets/033/083/609/57fe7dfb9833c595341b7f015564c4aa_original.jpg?ixlib=rb-4.0.2&crop=faces&w=1552&h=873&fit=crop&v=1618172524&auto=format&frame=1&q=92&s=1075a8fbb5057244b2b2d499568e9260)

I am in lust. Would have been very very tempted had I seen that on Kickstarter at that price. Am sure it will be a lot more retail.

I considered getting this, but it being battery powered put me off to be honest. Does look beautiful though.

They're still available on indiegogo. Looks beautiful I agree. I'm waiting for early reviews as beta testers reported some issues like grind retention in the funnel, excess static, etc. Then if those are fixed to convince myself I need to upgrade on the eureka…

Battery powered?! How was that determined the most appropriate course of action? I appreciate 3kg per charge is probably about 3 months for most people but still… As above, it’ll be interesting to see how it deals with the usual grinder related complaints like static and retention.

Well i wouldn't worry about battery, have you seen an sds drill go through concrete 😂 Its a stunning little grinder, while not a fan of the sweepers, remind me of cable ties .. But it could be a little gem.

> @"Cuprajake"#p14108 But it could be a little gem. Isn't it a belt drive? I also remember the praise being heaped on the Lagom Mini, so it's best to actually see what it really does.

@"Cuprajake"#p14108 Your point about the drill got me thinking… Presumably if it’s not running on constant voltage, as the battery wears down the motor rpm will reduce, as with a cordless drill? EDIT: I just read the blurb and apparently it uses an ‘intelligent battery management system’ to regulate the power to the motor so it’s consistent as the battery drains. I wonder if the cordless approach was to avoid having to consider different voltages worldwide and ship the same product globally.

@"Ernie1"#p14125 It's an induction motor I think, so shouldn't slow down. my concern would be about the batteries…are they replaceable, did they use 18650 cells etc.. as they will have a limited lifespan. They have not stated the grind times by speed ranges either?

@"DavecUK"#p14127 Indeed, interesting they specifically talk about sustainability being ‘top of the list of design priorities’ but then use a disposable power source.

> @"Ernie1"#p14129 Indeed, interesting they specifically talk about sustainability being ‘top of the list of design priorities’ but then use a disposable power source. I guess they wanted it to be portable…the main thing to find out, is what they are not telling you! It certainly looks nice.

Kopi Deva

MWJB

“…the retention of our grinder is within 0-0.2g of remaining coffee grounds. This is in line with a low retention grinder…”

It would be close to a miracle if it were true.

There isn’t a hard definition of ‘zero retention’ but Mark Prince suggested it was within +/-0.5g and this seems reasonable enough.

Otaibimn

MWJB Been using it non-stop for the last 2 months and for the first four times I cleaned it I had less than 0.3g of grind showing on the scale.

I believe them.

MWJB

Otaibimn 0.3g is more than 0.2g.

Do it another 6 times and post the weights for each of the 10 samples.

I tend to think that dose consistency (every time you use the grinder) is the more useful measurement than retention (only when you clean the grinder) and that is seemingly very, very difficult to get below +/-0.2g.

Otaibimn

MWJB There is retention and there is exchange.

Retention is basically how much the grinder will hold each time it grinds… but this is subjective.

Since some will be exchanged with the current grind.

You find grinders having 0.2g worth of retention each time… but in reality you are exchanging 1-2gs worth of coffee and that will be effecting the flavor.

So when I say the grinder holds only 0.3g worth of grounds in it’s assembly… the exchange will be much less than that and the retention will be lower.

This is impressive gentlemen.

DavecUK

Otaibimn You find grinders having 0.2g worth of retention each time… but in reality you are exchanging 1-2gs worth of coffee and that will be effecting the flavor.

You’re forgetting the third parameter, dose consistency…which this is…….

mackerel

DavecUK

what dose inconsistency is to expect from weighing beans for single dosing?

DavecUK

mackerel I think if you get within 0.2g it’s very good and even within 0.4g is more than acceptable.

MWJB

It’s worth noting that a lot of 0.1g resolution scales don’t actually go up/down in 0.1g increments, so if you have 0.1g scales and beans in and grounds out weights match up, I wouldn’t go looking for a problem.

But to measure consistency to 0.1g you rally need another decimal point on the scales.

Me, I just check in an extra bean or two anyway, trim the dose, then I don’t need to have those last few 0.1g’s of chaff in each grind. But if you just want to weigh once & brew high dose consistency makes for an easy life.

powderhorn

So, the button replacement finally arrived. Was simple to swap it in for the old one, which was bent. Here are a couple pix. Not sure how it got bent, apparently in shipping, that zip tie is suspect…

CoyoteOldMan

powderhorn Not sure how it got bent, apparently in shipping, that zip tie is suspect…

Shipping my left foot; the zip tie done it in the assembly.
I may be wrong, but I think it’s repairable - possibly with a bit of epoxy resin; if nothing else you have a spare.

powderhorn

Meanwhile, bigger problems. My touch point is 6.2 - I can’t get the grinder to grind beans at less than 7. Honestly, it’s pretty hard at 7, takes 20 seconds at least to get the first grinds. Grinds great at 10, but even 7 is way too coarse for espresso. I’ve put about 450g through it so far, but still looking for my first cup. Have tried misting but no improvement. Any tips for first time user? And at 7, it will grind through about 9g, and then stop. I have to start and stop the grinder about 6 times to knock out the remaining 9g. Hoping this is just lack of seasoning. Appreciate your advice.

DavecUK

powderhorn Sounds like something is not right with the grinder?

CoyoteOldMan

powderhorn Are the burrs concentric and parallel, or is there misalignment between the top and the bottom?

Also - what beans are you grinding? Perhaps try grinding some ‘cheapo’ darkish roast to season the burrs, as they will be softer.

All this said, I’m inclined to agree with Cuprajake

mackerel

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.

dcty

powderhorn I’ve got the same problem on mine. I emailed KD and am waiting. This is my kickstarter unit and when I grind fine enough to hit 2:1 18g in and 36g out the beans won’t feed. When I coarsen the grind the beans feed better but the shot is too fast. Stock kickstarter burrs. I’m considering switching to SSP HU to see if that fixes it. DId you find an answer?

Cuprajake

Wow, that’s not the best is it.

Wondering if you just got a Friday grinder.

I’d be tempted to ask for an exchange unit.

Cuprajake

What beans? Btw

Otaibimn

Contact kopi and get some feedback.

powderhorn

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.

mackerel

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?

Tjyven

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.

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