ACS Vostok

Adrianmsmith

In the 32 basket im on 19.5g plus puck screen.

I May be able to shave a few 0.xg off my dose . pucks are solid and I’m just starting to see rubbing on the screen from the shower screen screw

DavecUK

I got my 2 extra puck screens bargain at just over £6,…life changing, no longer to I muck about with tongs and dental picks trying to pick off the screen suctioned onto a moist puck. I now simply invert the portafilter on a sponge, clean the PF, pop another screen in.

Later when the puck it quite dry the screen falls of, I clean it and I’m ready to rock. No messy damp stuck and with 3 screens the system works great.

dfk41

DavecUK Am I right in thinking that thse puck screen will only really benefit the newer version Dave? I quite often have water on top of my shot once I have reached the desired weight

Adrianmsmith

DavecUK I got my 2 extra puck screens bargain at just over £6,

I picked this one up to try.

Im a sucker for an amazon warehouse “used” bargain!!

To be fair, this, apart from the logo is absolutely indestructible to the one from acs.

I wonder how many factories are making the 1.7mm cintered sheets?

Cuprajake

I mainly use them for cleanliness

Do you grind quite fine? Shouldn’t really have much water on the puck evo one

dfk41

Cuprajake I have to confess a certain amount of ignorance on this topic Jake. I still do exactly what I always did, which is extract double the dry weight in 25 to 35 seconds. My brain can just about cope with that formula!

LMSC

I do not see this phenomenon on my Evo one at all. There are rare times the water may struggle to go through the coffee - examples, Indian Araku, certain decaf. Loosening the grind or single tamping solves the problem, if the taste is an issue.

There were a lots of discussions during the first year of the Evo one launch re-the use of thick shower screens. Leaving the cleanliness of the shower screen aside, one needs to look at the impact it may have on the coffee. IIRC, it was not desirable to have them on top of the puck if one is drinking lighter roasts as the cup becomes mouth puckering, which is still the case.

Of course, the use case here is different for some here. I use IMS 26 and load 17-17.5g irrespective of the roast. No shower screens.

Have a good weekend!

M5Sime

I’m glad I found this thread as my Vostok is doing the same with a pre infusion pressure of 1.4 bar I am getting noticeable puck dents and the first drips of espresso are directly under that point. I have the same single hole setup - which I learn is the safety option (which is also interesting as it didn’t seem to be working when I slipped on the handle recently halfway pulling down).

I have been making good coffees for a few months, but seem to notice the puck dents more and perhaps I have to grind tighter and drop pre infuse pressure to gently soak the puck?

18g in and 32 out is my recipe.

Adrianmsmith

M5Sime (which is also interesting as it didn’t seem to be working when I slipped on the handle recently halfway pulling down).

Thats not what it is designed to correct.

Are you using a puck screen.

I use 2.3 to 3 bars pre infusion

Set point will not change the puck drilling (much) if you think about what is happening…. As the drilling is done ehe the first few seconds hit the dry puck. Pump pressure / flow is the same and does not change by set point.

The “safety ” part of the system can only work with an already full water system. It was designed to work i believe if you turn round sharply and somehow knock off the portafilter.

Dont get me wrong, im still the number one fan of the evo 2.

I prefer the blind sleeve to the original open sleeve……

Cuprajake

safety sleeve?

LMSC

Adrianmsmith The “safety ” part of the system can only work with an already full water system. It was designed to work i believe if you turn round sharply and somehow knock off the portafilter.

Interesting to hear the way it is designed to work.

Let’s look at it from practical / theoretical angle. While I understand and appreciate the intent, the design, time and resources which have been invested, what are the odds some one will accidentally knock of the portafilter vs the lever slipping out of hand? 😊

There are no right or wrong answers to this theoretical doubt!

Edit:

If this can be designed for the use case which is described here, IMHO, perhaps, the ACS want took at the other use case as well. My brain isn’t technical and will never be.

Cuprajake

Adrianmsmith The “safety ” part of the system can only work with an already full water system. It was designed to work i believe if you turn round sharply and somehow knock off the portafilter.

i dont believe so

Cuprajake

i would also on the mrs brazillian bean, how ever i used to infuse quickly then pull so 4-5s then lift the lever, i know some like the londinium style drip drip drip but on the evo for me that just really over extracted

M5Sime

I did try the screen once. Additional faff especially cleaning it later as I too have very wet pucks every time. Is this ‘essential’ and hence why it came with the machine? Thanks for clearing up the way the safety system works.

Cuprajake

M5Sime safety sleeve?

Adrianmsmith

M5Sime

If your puck are “sloppy wet” you need more coffee in there. increase by .2g increments until you are happy.

I dont get the faff aspect of the puck screen

I use it only to reduce the dose. 1.3g approx to the 1.7 screen in the 32 basket. I wish there was a 29mm basket!!

One light tap on the knock drawer bar drops the puck screen a second knock removed the puck

Put the screen on the drip tray and wash for a few seconds , turn it over and repeat…. Spotless. Note I’m talking about a cintered puck screen which washes off instantly.

@dfk41 i dont think theres anything wrong with your method ☕ and even if i did, its you that drinks it 😁

Adrianmsmith

LMSC

So, theres an “ If ”!!

If the lever slips out of the hand and the new flush lever is in use (pump on during lowering the lever) AND therefore the system is full of water AND you let it slip when near the bottom of travel, then the safety side will work .

If works simply be creating a damping effect due to the single hole but needs the water to create the damping.

I personally dont want the insurance the safety system provides.

But, I do prefer the blind sleeve and it’s shower screen therefore i have 4 x holes (1mm diameter) which i prefer as theres no restriction on fill rate and no drilling but therefore also no “safety” aspect. Still would be slower than the original open sleeve but wouldn’t want it hitting my jaw!!

Adrianmsmith

LMSC

As a certain “ chief engineer” once said…..

‘Ye Cannae Change The Laws of Physics’

Thanks Scotty ☕😁

But you can try and shape them to your advantage!!

Adrianmsmith

sergiu

If you want to sell one of your blind sleeves and could ship to UK drop me an email please with a price. I Want to do a bit more drilling but on a spare sleeve and never got around to asking Maria!!

Ade

coffee.batch216@8alias.com

Adrianmsmith

Cuprajake

Thats simulating the situation.😎

The important bit is the system is full of water when the lever is let go…

"If the lever slips out of the hand and the new flush lever is in use (pump on during lowering the lever) AND therefore the system is full of water AND you let it slip when near the bottom of travel, then the safety side will work .

If works simply be creating a damping effect due to the single hole but needs the water to create the damping"

LMSC

The maximum impact / risk is when the chamber is not of full of water - when the lever is being locked and it slips out of hand. The chamber is empty or not full. This safety feature wont work, right? If yes, it is worth researching into the design.

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