Just downloaded footage from my secret webcam in the kitchen of @"DavecUK"#1 only to discover that he's been holding out on us! Cmon Dave, spill the beans (not the coffee ones) on this geourgeous looking leva. [URL=https://i.imgur.com/Y7e0uuz.jpg][IMG]https://i.imgur.com/Y7e0uuz.jpg[/IMG][/URL]

For this machine it's one of the first made, and I am doing an Engineering review on it for Antonio (the creator) as a favour, so I can't really comment at this stage. But I can post photos….and say that the Paddle levers on this are very basic beta ones….so that area is still in the design melting pot.

needs to be 50mm shorter for a uk work top haha i believe this is a commercial focsed machine?

I love the look of these sorts of lever machines, but they really need to at least try to make them a bit more compact in design. They're either lacking in that area of expertise or they don't care… A more compact design would look like a much better centre piece in a kitchen (and take less space in a commercial setting), rather than protruding till the near edge. The size distracts from the elegance of it.

Certainly a looker. I'm sure we will all look forward to your thoughts when you are able to comment.

@"Cuprajake"#p10000 no it's for the home market

@"Cuprajake"#p10000 from the nurri website https://www.nurri.coffee/portfolio-item/nurri-leva-sa-machine/ L-TYPE LEVA S.A. is a professional machine. Yes. But it is designed for those who want to enjoy quality espresso at home, making it with the same passion and competence of a professional bartender.

@"tompoland"#p10004 I like how they stuck Patent Pending on everything 🤣 a bit unprofessional.

@"Sham"#p10001 I agree when it comes to similar sized Levers that require external plumbing or flojet type arrangement. But the Nurri is dual boiler and plumbing is optional. Still, I agree that it's a lot for a normal kitchen. I like the footprint on the Decent for example.

Powder coated version. Wow. [URL=https://i.imgur.com/7uFzqtw.jpg][IMG]https://i.imgur.com/7uFzqtw.jpg[/IMG][/URL]

@"tompoland"#p10007 In that case they should have either decreased tank sizes and utilised quicker water heating technology (I'm sure there's loads of options from other industry's) or started with a more wide design but I guess that would've cost too much R&D time. One way to think of it is that they won't lose customers if its small, but they will lose customers if its too big. It does look pretty nice though.

Nurri Leva S.A.

tompoland

chlorox that makes more makes sense. Tx for the clarification.

chlorox

Cuprajake

For me, rhe nurri paddles on the grouphead are a distinctively different technical solution than the push buttons on the console from the perspective of user feel and rhe fact that it is mechanical in nature as opposed to computer controlled.

Just like the solenoid three way valve for the pump machines, no burn steam wands, and dedicated single dosing grinders, such innovations make the work flow more elegant, easy, enjoyable, safer, convenient and consume less energy on tbe part of the user. I suspect that such solutions like that will become more common in future levers and become part of the expected industry standard that will be expected of any decent ptrmium lever machine. This is all good for the consumers because innovation in the lever market has been ossified for too long a time and some manufacturers are contentto offer old tech levers that have barely advanced since the 60s at high prices. Now things are finally changing for the better in a big way for the home marker with the advent of the leva x, vesuvius evo, nurri leva and vostok.

CoyoteOldMan

chlorox rhe nurri paddles on the grouphead are a distinctively different technical solution than the push buttons on the console from the perspective of user feel and rhe fact that it is mechanical in nature as opposed to computer controlled

How ‘mechanical’ is the end-shot paddle? I mean: does it actually open a valve with a mechanical link, or does it activate a solenoid through a microswitch? I’m just curious. Totally agree with you on the feeling - it’s (in my view) a bit like the difference between a CD and a memory stick. Both may contain exactly the same music, but I prefer the CD 🦖.

chlorox

CoyoteOldMan

Sorry, by mechanical, I don’t mean to suggest the left paddle directly and physicallypulls open the valve. I don’t know how it actually operates within tbe grouphead to open the valve. What I meant to say can be more accurately said as it appears and feels as if it is a mechanical means of operation because tbe paddle is physically conndcted to an assembly or structure, moving the paddle mechanically moves that assembly and as the assembly moves physically forward, something which can be heard to click open. This is true regardless of whether the machine is powered on or not, the same click is produced. This is as opposed to just pressing a button on the console of the body of the machine which feels completely physically disconnected from qhatvthe grouphead is doing.

CoyoteOldMan

chlorox I don’t mean to suggest the left paddle directly and physically pulls open the valve

I didn’t think you meant it! I am just curious to understand how it’s done; I can think of how to do it with effectively a 3-way solenoid, but I don’t know if that’s how it’s done on the Nurri.

And I totally understand what you mean re mechanical connection/disconnection - that’s why I was giving the analogy of a CD vs. a memory stick, rather than mentioning vinyl. Ultimately, it’s the same string of bits that is going through a very electronic DAC process; a vinyl record is a totally analogue process, from movement of the needle in the groove to a speaker diaphragm moving at the same frequency. But the CD still has a certain amount of ‘physical feeling’ - you need to take the disc in hand, put it into a reader and close a door. Not just click on an icon.

MediumRoastSteam

chlorox don’t know how it actually operates within tbe grouphead to open the valve

You can - if you can be bothered for the sake of scientific and accurate information:

pull a shot as normal;
when the shot is finishing, turn the machine off.
try releasing the pressure in the group by means of activating the paddle as usual: if it works it’s purely mechanical. If it doesn’t, it’s likely to be via a micro switch and solenoid valve.
let the group depressurise and, after that, turn the machine back on again.

chlorox

CoyoteOldMan

Yes that’s a very apt way of putting it!

chlorox

MediumRoastSteam

That’s a good idea. Is there any risk of harming the machine? If not, I’m willing to try it as I’m curious as well how it worke. Does the fsct rhat it makes the same clicking sound when I pull thr paddle even when it is switched off show that it is mechanical?

tompoland

MediumRoastSteam try releasing the pressure in the group by means of activating the paddle as usual: if it works it’s purely mechanical. If it doesn’t, it’s likely to be via a micro switch and solenoid valve.

It doesn’t.

MediumRoastSteam

chlorox - the clicking sound could just be the activating of the micro switch (e.g.: pressing any button with the equipment off). Without owning one it’s hard for me to assess for sure. But it’s my understanding there’s no harm to the machine as the group itself is fully mechanical and the extraction would just carry on as normal.

Even if I do that to my machine (which I did before, by mistake) - a lelit Elizabeth which has the group operated by solenoid valves and all sorts, all it did was to release the pressure from the group as the solenoid became de-energised (normally open).

But maybe someone with more knowledge than me could confirm.

CoyoteOldMan

chlorox I don’t think there is any risk - the ‘worst’ that happens is that the paddle is actually clicking a microswitch, in which case the pressure releases as it has done in all other LSM group machines for 75 years, through the puck. If there is a mechanical valve being operated, then the pressure gets released in exactly the same way whether the machine is on or off.

You just need to remove the cups from under the filter when you switch off, because the tail of the extraction (say under 7 bar) doesn’t taste very nice!

Whether you can be fussed to do it in the name of our curiosity, is a different question altogether!

DavecUK

chlorox It operates microswitch, that electrically activates a pressure release solenoid, connected to the hole the factory made to create the group. It’s usually sealed, but can be opened for a solenoid to be fitted.

The click you are hearing when the machine is off is probably the microswitch. If it’s in fact the solenoid, then be careful when poking around inside the machine as it might not be off, off…when you switch it off. You can tell by switching the machine off at the mains and see if you still get the same click.

MediumRoastSteam

DavecUK - chlorox - looks like there’s no need for the suggested test. Dave confirmed it’s a solenoid operated by micro switch. 👍

chlorox

DavecUK

Thanks for your post Dave.

As I had said earlier, the clicking sound is made when the left paddle is pulled regardless of power being on or off.

I just tried the experiment that mediumroaststeam suggested and switched off the machine while the lever was doing its extraction phase. It did nothing - the lever contained to rise slowly at the same rate and there was no release of the water in the groupheead into the drip tray and there was no clicking sound.

Then when I pulled the left paddle while the machine remained switched off, the clicking sound was heard and the water from the grouphead was vented into the driptray. Thus the operation of the left paddle is not reliant on an electrical power supply at all.

Based on what you explained and suggested, Dave, my experiment seems to show conclusively that the valve is not opened electrically at all unlike the case with a pump machine. Therefore is it reasonable to expect the that it is not in fact operated by an electrical circuit and that it is purely mechanical - which will make it totally different from kees van der westen’s version?

chlorox

MediumRoastSteam

In the spirit of science or at least blundering curiosity, I did it anyway LOL

Cuprajake

Hi,

The paddles actives micro switches just like when you use a lever on an e61 group

I wasn’t really talking about the paddles more the modifications to the group to allow the pressure to be drained

I presume it would be solenoid based like the minima groups, which was confirmed by the vid.

Either way it’s still a button being pressed just one is with a fancy paddle the other your fingers.

Like I say for me the jury is still out on the venting of a lever group.

chlorox

Cuprajake

(I posted an earlier reply which I accidentally overwrote and deleted when I replied to dave! So here it is again In hopefully more succinct form)

I have already posted above how the paddle on the grouphead offers a very different feeling interface than push button on console so regardless of the internal mechanism, it is different already from that perspective.

On whether the jury js still out, i note that ACS has ialready ncorporated a venting the grouphead control (by push button on the console, I assume) and backflushing requirement for the new vostok. Since acs is the only other maker of mschines that are in any way similar to the nurri, that shows that the industry is already making this feature available to consumers of this market segment as part of the package. Hopefully in time this would become the expected thing of all levers…

On its utility, let’s not forget that the solenoid valve isn’t a perfect solution even for pumps - it leaves a soggy puck and it doesn’t stop on the dot and still continues dripping (though to a lesser extent due to far less volume of water remaining in the grouphead or below the screen). And yet it has become universal in pump machines.

I was the owner of an izzo for a long time and I used to just let it drip or remove the cup and let it drip into the driptray. Due to Dave’s advice on this forum, I then adopted the plastic container swapping method. So I already had an established work around which I still even periodically use for the nurri. But I find that now that i have the nurri that has this ability, I use it most of the time due to its convenience rather than messing with a plastic container and swapping the cup with it. For me, I can testify that I now greatly prefer using the left paddle to swapping cups and I hope this becomes the accepted borm among levers as it is among pump machines.

DavecUK

chlorox Unplug it…or switch off at the mains, unless that’s what you did (don’t switch off on the machine alone).

I am sure, working from memory that it operates a microswitch….as I did review one and I am sure it just operates a microswitch.

chlorox

DavecUK

Is ut safe to be unplugging it entirely from the mains during the extraction phase?

simonko

chlorox I was the owner of an izzo for a long time and I used to just let it drip or remove the cup and let it drip into the driptray.

I would have liked the venting on my Izzo Valexia - as the cup clearance with a double spout is too low to put anything underneath without a juggling act, especially not with scales and if you’re retarding the lever manually.

So I dripped into the tray as well and tried to clean before creating new species. (Sidenote: Aldi beans must be sprayed with mould inhibitor or something - they don’t spore.)

Here the cup clearance looks much better - so feel I wouldn’t value it as much - however let’s face it, we will upgrade int the future and it’s an attractive feature when reselling!

Same with the preinfusion - I’m happy with mains preinfusion and would prefer no pump, tank and the complex Gicar in the Nurri - and would jump at a Nurri without those- but they give men semis when re-selling.

I ordered mainly because of the heat up time, LSM group, smaller boilers and looks.

MediumRoastSteam

tompoland It doesn’t.

Did you completely unplug the machine from the mains? I’m curious because that wasn’t the case for @chlorox .

Cuprajake

Yeah I understand what your saying, I’m not fussed what you press

What I’m saying is I don’t like a feature that in my mind feels like a backwards step.

Something that adds work imo isn’t a good idea

Just because market dictates that it should have it doesn’t mean it should.

Acs are probably doing it because other levers in the market also do it.

It’s not a dig at nurri, people seem to get so defensive over their machines. It’s also a bad design on the kvdw,

All personal opinion of course.

chlorox

Cuprajake

Since you are suggesting that i am being defensive, i will explain thar one of the reasons I have posted so much to explain the new features of the nurri is because even before i bought the nurri, I have perceived precisely what appears to be that sort of defensiveness (sometimes prefaced with a denial of being defensive!) among some owners of the vesuvius evo on this forum towards the nurri as viewed in the comments they make about it. How much of the fears over soggy pucks and backflushing can be attributed to a subconscious form of being threatened by a new machine? (There I was thinking that the point of making coffee was to make coffee and not to get a dry puck)….There was even one case where one poster asked another poster to justify why he bought a nurri in favour of a vesuvius evo, and proceeded to respond to those reasons!

The funny thing is that the beauty of adding this capability to a lever is that you don’t have to vent the grouphead to end the shot at all if you don’t want to, or you can do it only part of the time if you don’t want to, or you can do it all the time if you want to.

In other words, having it is better than not having it because you have the power. Whereas in the case of a lever without that capability, you don’t have that choice.

As for now much work is caused, I would have thought that having a more elegant, more energy efficient (pulling a paddle with one finger vs switching cup and container) and less messy way of cutting the shot when you use it several times a day is well worth the need to backflush it every few weeks but ymmv…

Lastly as for bad design how can it be bad design for it to appear in every pump machine. I’m sure it is possible to manufacture pump machines that do not automatically open the solenoid valve when the pump is switched off to relieve the pressure so there’s nothing inevitable about it…

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