(GPGT)Espresso machine hoot

[Lazy_Tiger]

I already did all that except changing to an IMS shower screen. Could it be that i screwed the shower screen back in unevenly?

Hmmm don't think need to change to the IMS screen first. What machine are u using?

 

[prozaizxc]

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Hmmm don't think need to change to the IMS screen first. What machine are u using?

rancilio silvia!!

 

[embrosiur]

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rancilio silvia!!

Hi, is this a something you have been experiencing only recently or since day one when you first received your machine. when you finish extraction and look at your coffee puck, do you see holes on the left side of your coffee puck or do you see the left side having a lower level then the right?

 

[Lazy_Tiger]

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rancilio silvia!!

For new silvia's there is another part called the jet breaker that you need to clean too. Can google and see it gets very dirty.

Sometimes is not really uneven dispersion but just the kind of beans you are using. maybe try to grind finer and brew longer to see if you get that nice centre stream that you see on videos.

 

[Corsabrin]

tomorrow!! anyone going?

btw, when can we expect the sette to arrive on our shores?

 

[prozaizxc]

Hi, is this a something you have been experiencing only recently or since day one when you first received your machine. when you finish extraction and look at your coffee puck, do you see holes on the left side of your coffee puck or do you see the left side having a lower level then the right?

hmm, I've been experiencing the left side of the puck always having more liquid come out than the right side but thought it was due to an uneven tamp/ dose so I've been trying to improve on that but then i realised now that my tamp and dose is pretty much even and most of the times the result is still the same.

the funny thing is that if i am unevenly dosing or tamping, sometimes it might be that the right side may have channelling so the right side of the puck would have more liquid coming out but it has never happened and its consistently the left side flowing faster than the right!

Recently I have been seeing a slight indentation on the 11.30 o clock of the puck (viewed from the angle of the clock) but this problem has been before I've been noticing this indentation hmmmm

 

[prozaizxc]

For new silvia's there is another part called the jet breaker that you need to clean too. Can google and see it gets very dirty.

Sometimes is not really uneven dispersion but just the kind of beans you are using. maybe try to grind finer and brew longer to see if you get that nice centre stream that you see on videos.

Yup, i take that out too to clean together with the shower screen! Actually when i cleaned it for the first time after like 4-5 months of usage it was still really clean, barely any grinds on it. Is there a correct angle to put it back together?

Grinding finer would cause the middle to not have espresso coming out, rather it comes out more from the outer ring

 

[prozaizxc]

Maybe your table not even

Oops didn't see this reply. Very interesting! I shall use a spirit level on my iPhone to check hehe

 

[embrosiur]

hmm, I've been experiencing the left side of the puck always having more liquid come out than the right side but thought it was due to an uneven tamp/ dose so I've been trying to improve on that but then i realised now that my tamp and dose is pretty much even and most of the times the result is still the same.

the funny thing is that if i am unevenly dosing or tamping, sometimes it might be that the right side may have channelling so the right side of the puck would have more liquid coming out but it has never happened and its consistently the left side flowing faster than the right!

Recently I have been seeing a slight indentation on the 11.30 o clock of the puck (viewed from the angle of the clock) but this problem has been before I've been noticing this indentation hmmmm

Hi, if you do not see fissures in the puck and you do not see puck level unevenness, I think that it is not due to the dispersion of the shower screen. From my limited understanding, once the cavity between the shower screen and filter puck is filled with water, the pressure in the cavity is uniform throughout the cavity. Unless there are fissures in the puck or puck level unevenness, the pressure drop across the puck will also be uniform and the extraction is expected to be uniform across the filter basket. If there is water jetting from some holes of the shower screen due to plugging/hole manufacturing issues etc, the symptoms should be fissures in the puck. Perhaps you can consider rotating your filter basket 180deg around the clock to see if you get faster flow on the right side instead. If the holes of the filter basket are not of even size, this may be another cause of your observations. Also, you observed an indentation in your puck, i assume you do not see a print of the shower screen on your puck since you did not mention it and did not see any fissures as well. This is because over dosing can cause the shower screen to create fissures in the puck if the water jet is in direct contact with the puck. Hope this helps. If not I also don't know. Haha

 

[tyrtok]

heading down to f1 pit tomorrow to take a look. sad that the latte art lesson is fully booked. maybe go down to walk walk only.

 

[Corsabrin]

Dropped by F1 building this afternoon. Overall had some interesting conversations with the exhibitors and good to see various coffee and espresso equipments under one roof! Parking was $10/entry. Tempted to buy the OCD, but hesitated due to its price haha. If you guys going down, remember to get your free latte from slayer machine!

Took some pictures during the event. Feel free to browse! p/w is caffeine

 

[Lazy_Tiger]

Hi, if you do not see fissures in the puck and you do not see puck level unevenness, I think that it is not due to the dispersion of the shower screen. From my limited understanding, once the cavity between the shower screen and filter puck is filled with water, the pressure in the cavity is uniform throughout the cavity. Unless there are fissures in the puck or puck level unevenness, the pressure drop across the puck will also be uniform and the extraction is expected to be uniform across the filter basket. If there is water jetting from some holes of the shower screen due to plugging/hole manufacturing issues etc, the symptoms should be fissures in the puck. Perhaps you can consider rotating your filter basket 180deg around the clock to see if you get faster flow on the right side instead. If the holes of the filter basket are not of even size, this may be another cause of your observations. Also, you observed an indentation in your puck, i assume you do not see a print of the shower screen on your puck since you did not mention it and did not see any fissures as well. This is because over dosing can cause the shower screen to create fissures in the puck if the water jet is in direct contact with the puck. Hope this helps. If not I also don't know. Haha

I kinda agree. Assuming puck integrity is even during the extraction phase then the pressure should be more or less even provided the top of the puck did not hit the shower screen.

But its possible that uneven flow during the wetting phase also cause the side that water flows more to be more porous to the espresso flow despite the puck being perfectly prepared and undisturbed after locking in.

Why not try to under dose (14grams). lock in normally, unlock again to check if the shower screen scrapes against the puck. then lock in back again and extract to see if you still observe the same thing.

Need to ensure your puck is perfectly prepared. Even distribution and level tamping. Use WDT to ensure distribution is even, Tamp straight down and very slowly to ensure level. Use the top edge of the portafilter against the top lip of the tamper as a guide.

The silvia is not easy to master. Parameters have to be precise and technique has to be perfect and consistent. There is no preinfusion and if i recall correctly the flow rate is quite fast since there is now flow restrictor (0.6mm on more espresso machines). But once you master the silvia, all other machines are a breeze to brew since it trains the user to be very exact. I started with a silvia too.


Here is a way to kind of preinfuse using a silvia! Using the steam wand valve.
http://www.studiobronts.com/2013/03/31/preinfusion-with-unmodified-rancilio-silvia/

 

[testerjp]

Oops didn't see this reply. Very interesting! I shall use a spirit level on my iPhone to check hehe

Try using a convex tamper, it clearly helps.

 

[prozaizxc]

I kinda agree. Assuming puck integrity is even during the extraction phase then the pressure should be more or less even provided the top of the puck did not hit the shower screen.

But its possible that uneven flow during the wetting phase also cause the side that water flows more to be more porous to the espresso flow despite the puck being perfectly prepared and undisturbed after locking in.

Why not try to under dose (14grams). lock in normally, unlock again to check if the shower screen scrapes against the puck. then lock in back again and extract to see if you still observe the same thing.

Need to ensure your puck is perfectly prepared. Even distribution and level tamping. Use WDT to ensure distribution is even, Tamp straight down and very slowly to ensure level. Use the top edge of the portafilter against the top lip of the tamper as a guide.

The silvia is not easy to master. Parameters have to be precise and technique has to be perfect and consistent. There is no preinfusion and if i recall correctly the flow rate is quite fast since there is now flow restrictor (0.6mm on more espresso machines). But once you master the silvia, all other machines are a breeze to brew since it trains the user to be very exact. I started with a silvia too.


Here is a way to kind of preinfuse using a silvia! Using the steam wand valve.
http://www.studiobronts.com/2013/03/31/preinfusion-with-unmodified-rancilio-silvia/

Hmmm, definitely will try and see if I'm over dosing. Im using 16g in the stock silva's double basket. Looking to get the VST basket soon but am a little hesitant as I'm using the espro tamper and then the size of the tamper does not really fit VSTs really snugly and so I may have to fork out quite a bit more to get like a pergtamp.
On this topic, which tampers are y'all using with vst baskets?

Very interesting article. Haven't read about this before. Will definitely try. At what point do you turn of the steam wand valve after hitting the brew button? Apparently its when you "hear" the puck being fully wet from my understanding after reading is it?

 

[prozaizxc]

Try using a convex tamper, it clearly helps.

Ohh, but I don't have a convex tamper currently. ill look into it if I'm changing my tamper thanks!

 

[prozaizxc]

What are you guy's thoughts on artisan smith's products? Ive just found out about them and would like to try my hand at pour overs. Considering if I should get their kalita wave dripper as it just looks too good. (FYI I don't have a kalita yet)

Are there any other brands similar to theirs that you guys know? It looks just so damn aesthetically pleasing and it doesn't cost alot more than the normal kalita wave / kettles

Also, I just thought of this regarding keeping beans because I remember there was a discussion here. Why not use vacuum bags that are reseable instead of the valve bags? Sucking out all the air from the bag would enable the beans to last longer no? But the beans would still "breath" so there would be co2 released from the bag so... idk how that logic continues after that haha

 

[patryn33]

Also, I just thought of this regarding keeping beans because I remember there was a discussion here. Why not use vacuum bags that are reseable instead of the valve bags? Sucking out all the air from the bag would enable the beans to last longer no? But the beans would still "breath" so there would be co2 released from the bag so... idk how that logic continues after that haha

Don't know the science behind degas.
No O2 how to breath?
If beans don't need O2 to release CO2, wouldn't beans become lighter as they get sale? Then how 1kg of beans release up to a few kg of CO2?

 

[mirage86]

Hmmm, definitely will try and see if I'm over dosing. Im using 16g in the stock silva's double basket. Looking to get the VST basket soon but am a little hesitant as I'm using the espro tamper and then the size of the tamper does not really fit VSTs really snugly and so I may have to fork out quite a bit more to get like a pergtamp.
On this topic, which tampers are y'all using with vst baskets?

Very interesting article. Haven't read about this before. Will definitely try. At what point do you turn of the steam wand valve after hitting the brew button? Apparently its when you "hear" the puck being fully wet from my understanding after reading is it?

I think it might be better if you can take a few photos of your coffee puck - pre-tamp, tamped, post-extraction, so that we can have a better idea.

Without looking at those, I can also suggest to try a longer pre-infusion (try 8-10 secs at a much lower pressure) as it definitely helped to minimize a lot of channeling for me.

 

[mirage86]

Don't know the science behind degas.
No O2 how to breath?
If beans don't need O2 to release CO2, wouldn't beans become lighter as they get sale? Then how 1kg of beans release up to a few kg of CO2?

I'm not 100% sure about the science behind this, but I believe you don't need O2 to release CO2.

The carbon dioxide is trapped inside the bean when it's roasted, so it will release by itself over time after the roasting.

The bulk of the carbon dioxide is released within first 24hrs from roasting, so assuming the shop doesn't weigh and pack immediately after roasting (usually they would let the beans degas first), the weight in the retail pack shouldn't differ too much from the stated weight on the bag.

 

[mirage86]

What are you guy's thoughts on artisan smith's products? Ive just found out about them and would like to try my hand at pour overs. Considering if I should get their kalita wave dripper as it just looks too good. (FYI I don't have a kalita yet)

Are there any other brands similar to theirs that you guys know? It looks just so damn aesthetically pleasing and it doesn't cost alot more than the normal kalita wave / kettles

I like the pourover kettles from these guys: https://monarchmethods.com/

Very similar style to Artisan Smith!