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)

Kopi Deva

Otaibimn

They started shipping them today.

Anybody kickstarted it?

A zero waste coffee grinder - engineered to the precision of a Formula race car. Literally.

simonc

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.

Beverast

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

hthec

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…

Ernie1

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.

Cuprajake

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.

DavecUK

Cuprajake 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.

Ernie1

Cuprajake

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.

DavecUK

Ernie1 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?

Ernie1

DavecUK

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

Otaibimn

DavecUK I supported them through the Kickstarter and here are a couple of things to highlight:

1- It is using a brushless DC Motor. Not an induction motor.

2- It has an RPM range of 200-1000 initially but was upped to 200-1200 rpm range.

3- It uses a belt. But, It’s a toothed belt. I hate belted grinders since most use the smooth type of belts but the deva is using a toothed belt that will help in the torque conversion.

4- The most interesting part is the mailable copper piece that they implemented in aligning the burrs. Gonna post a YouTube video on it below.

5- The battery is replaceable on site. No need to ship it and they are using a LiPO battery which I approve of instead of 18650s. The Lipos will give you the DC current all the way down to the end of the charge while the 18650s will be decreasing voltage through out the charge.

6- My guess why they went with the battery option is reduce the need for certifications and electricity needs all over. (50/60hz 110/230v compatible worldwide) while also giving the option of having it as a portable unit.

7- The thing that won me completely was the honesty during the kickstarter, They were transparent to a point which is rarely found in any crowdfunding exercise.

A couple of pics:

As a rotating equipment engineer by day… I get an eyegasim once I see alignment such as this:

In addition, He is checking alignment of the shaft at the end of shaft…. not like some other companies that check it at the midpoint of the shaft and giving an illusion of decent alignment. 30 micron reading at the middle can be between 50 to 70 at the end of the shaft.

Pic of the belt (Clever means of using the upper wooden part to hide it and most likely a design choice to help in replacement without a complete dismantling if it needs replacement):

Rarely would see videos of maintenance work be posted 3 months prior to delivery:

Normal Operation:

Cleaning and replacement of burrs with how to align it:

Replacement of the battery:

Pros:

1- Small Design.

2- Portable.

3- Compatible with the most used home burrs 64mm burrs (They confirmed compatibility with SSP burrs but approved SSP HU for espresso and found SSP MP to be to slow in grinding espresso). They also confirmed that the new SSP Cast are compatible on Instagram but no news yet if it will fit espresso also or just filter.

Link: https://www.kopiconcepts.com/news

4- Price is extremally good for what you get.

Cons:

1- Reliability is unknown at the moment.

2- It’s a kickstarter with a pandemic so there was some delay in shipping. 3 Months delay is nothing to some other kickstarters… There is one with two year delay.

3- It is battery powered so the battery will die sooner or later but replacement seems to be easy.

4- It has maximum dose of 30g (which is fine for home espresso use) but some won’t like it for filters especially for those who usually grind 50g. They stated you can keep feeding it but that’s an extra workflow.

Waiting for my unit to be shipped to abu… err… use for a awhile before giving full feedback.

I am smelling a very good alternative to the niche for home use if you are into flat burrs.

DavecUK

Ernie1 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.

athan93

Otaibimn My guess why they went with the battery option is reduce the need for certifications and electricity needs all over. (50/60hz 110/230v compatible worldwide) while also giving the option of having it as a portable unit

Hi there, been following this project for some time and am a long-time lurker on coffee time and other forums. I had the opportunity to visit the Kopi deva workshop and tested a fully assembled final version before I placed an order with them. Met with Brandon and Sara, it was an informative long chat. The grinder i tested has been used to make more than 1000 shots according to brandon.

The decision to fully go battery was to let it stand alone as well as portability. The grinder just popped being at the edge of the counter without any messy cords running behind it. I was quite surprised as well to see the size of the grinder, it was shorter than I imagined it to be. Beautiful finish (loved the matt black).

For the speed, for espresso on 1100 rpm (the dial for the rpm had an odometer design, loved it) it was around 25 sec for an 18gram dose, the way the beans fall out from the chute was in a donut formation, but there was a clump that will fall when the grinder stops spinning (according to Brandon its the difference in pressure between the top and bottom section). Brandon then went on taking the top wooden at the top off, the decision to use a toothed gear was great and the decision to have the motor and chamber on different sections was to combat vibration, runoff, alignment, and ease of assembling.

Then he went on by showing me all the types of bearing they tested and for the life of me I can’t seem to recall the brand or model, but it was manufactured in Sweden. The shafts were thick and short (machined in the UK) and most of them had good tolerance, he picked one off the shelf, it was less than 30 microns runoff. However, he was more concerned about the burrs being as parallel as they can be, and to my eyes, the malleable copper works. I am not sure about the longevity of it tho. The rubber wipers made it feel cheap, but it’s required, plus it is not something you would see. So I guess it was fine.

The knob to loosen the grind adjustment had rubber in the end, so it would not scratch the grinder, to adjust the grinder felt good, it was just nice, You would need to grab it tightly to turn it, it felt amazing to turn, each marking on the adjustment was 10 microns. Brandon even went through the hassle to ensure all grinder’s touchpoint is at 0 by adding thickness through precut shims at the adjustment collar.

Came back home and placed an order for that grinder on Indiegogo. The design and manufacturing of the grinder I tested were amazing. From the function to adjustment, to the components used, to the fit and finish, it was beautiful. I did not find any fault with the grinder (except for how the bean exit the chute when you stop the grinder and having to tap the chute to ensure all beans are out), Having used the DF64 and Lagom P64 in the past, this grinder feels more inclined to the P64. To be frank for ⅓ of the P64 grinder, and by matching whatever the lagom does and a little bit more, it’s an amazing deal. If there is anything you would like to know, and if I can answer your question, I will.

DavecUK

Otaibimn 1- It is using a brushless DC Motor. Not an induction motor.

That’s what I meant by induction as I know it’s a DC motor. Hence why I said it would not loose speed as voltage declined, impulse controlled. Sounds like you will be a good source of info for the grinder.

As for 18650 I was just using it as an example of something replaceable. I use lipo packs for cars in my converted drills that used to run on nicads. Which I imagine they use. I use 3 and 5s packs.

Are they using Italmill for the burrs?

Otaibimn

athan93 Sweden Bearings?

Brandon went all out on SKF bearings. Kudos indeed.

They are an industry standard for bearings and not any industry… Heavy. Talking Major factories.

Didn’t RDT help with the last clump? TBH I loved the espresso distribution in the videos.

Felt like this:

@DavecUK Naw Dave. I am just an enthusiast.

hthec

Thanks for the info Otaibimn and athan93

I haven’t known about the Deva for long, but have been impressed by the timely updates and transparency and the perks they added after funding completed. I’m at work now but definitely plan to check out the burr disassembly video you linked as it’s one thing I look for in my next grinder. oh dear I told myself when I bought the Eureka that it would last me a long time…

athan93

DavecUK I think “if” they are using Italmill burrs, the SSPs should be a huge improvement, as would Mazzer Burrs.

Mazzer jolly burrs. He choose that due to, in his own words “versatility”. The amount of sample burrs he had at hand and tested was staggering.

Otaibimn SKF bearings.

I just remembered where they were manufactured. Sweden, no idea why my brain only retained that part of the info.

Otaibimn Didn’t RDT help with the last clump

For the espresso he made, he did not RDT. For filter, he RDT and poured directly from the test tube. From filter bac to espresso grind setting, the burrs moved smoothly. No stop start to clear the grinds between the burrs (looking at the DF64)

JahLaza Looks good, the bean feeding looks a bit of a challenge does it

It looked awkward, but brandon fed the funnel using a dosing cup as well as test tubes, but did not use the shovel that it came with. Fed pretty smoothly.

DavecUK

It does look much better value than the Lagom. Be interesting to hear how owners find them…once they are in the field.

Ernie1

It does look good, nice use of materials.

Between this and the Fellow Ode, I foresee a lucrative grey-market for 64mm SSP burrs, they’re already difficult enough to get hold of as it is!

DavecUK

Ernie1 Between this and the Fellow Ode, I foresee a lucrative grey-market for 64mm SSP burrs, they’re already difficult enough to get hold of as it is!

I think “if” they are using Italmill burrs, the SSPs should be a huge improvement, as would Mazzer Burrs.

JahLaza

Looks good, the bean feeding looks a bit of a challenge does it?

Otaibimn

DavecUK The problem with SSP burrs especially the HU ones is that they require extremally good alignment.

Had them installed on the DF64 and even though I tried my best (with a dial gauge even) I couldn’t for the life of me to get it aligned properly to get good syrupy extractions. Hoping the Deva solves that issue (I almost went with a lagom for that reason alone).