Printed Jura F7: Verwirrende Parameter

Hello all,

I got a defective Impressa F7, serviced and repaired it. The machine seems to work really well, the coffee tastes good too. However, I somehow have my problems with the settings. Such a coffee machine has at least theoretically the following possibilities to influence the end product, apart from the possibilities that still exist in the context of changes to the brewing unit:

- Water quantity-
Flow
rate-

Water pressure-
Grinding degree of the coffee powder-
Amount of coffee powderSince



the





water pump is a static pump, the following parameters remain:

- Water quantity-
Grinding degree of the coffee powder-
Amount of coffee powderCan

it be that times on the machine also set exactly these values? Independently of the product? So with the mechanically adjustable grind is also logical, but with the water quantity and with the coffee quantity not!

Why Jura speaks of a "coffee quantity" instead of "water quantity" ? And why from "coffee strength" instead of "coffee quantity"? If you set a "coffee quantity", the powder quantity should also be adjusted depending on this. The same applies to the "coffee strength". But this is obviously not the case. The program names Espresso, Ristretto and Coffee are also nonsense. If you set the same amount and strength in all programs, the result will be the same. So a normal ristretto is just as strong as a normal coffee. That's nonsense. Then the programs should have been better called "Program 1" to "Program 3"....

Do you see it the same way or am I on the wrong track here and the parameters behave differently and the programs have a different basic setup?

Thank you!

Hello together,

Can anyone help me out here? I can of course also find out myself, but then I spend unnecessarily much coffee. Here again the questions compactly together:

- When "coffee quantity" is set on Jura, that is exclusively water quantity with no effect on coffee bean quantity, correct?

- When the "coffee strength" is set at Jura, that is exclusively a static bean quantity without dependence on the amount of water, correct?

- The 3 coffee programs Espresso, Ristretto and Coffee also provide the same final product with the same quantities and strengths, correct?

Thank you!

Yes, that's how it is. And it also sounds logical to me. Coffee quantity for me is equal to how big my cup is and coffee strength is equal to how much coffee is ground. And that's how I program those three grades.
I don't understand your problem.

Yes, according to the answer you have not fully understood the problem. Basically, there are two ways to set a coffee and its strength.

Variant 1: Definition of the target quantity and definition of the relative(!) strength

Variant 2: Definition of the absolute(!) individual quantities

Example for 1:
Quantity on 100 ml & Strength on Normal --> 100ml water and 10g coffee
Quantity

on 200 ml & Strength on Normal --> 200ml water and 20g coffee

Quantity on


100 ml & Strength on Strong --> 100ml water and 15g coffee


Quantity on



200 ml & Strength on Strong--> 200ml water and 30g coffeeExample



for





2:
Quantity on 100 ml & Strength on Normal --> 100ml water and 10g coffeeQuantity on
200 ml & Strength on Normal --> 200ml water and 10g coffeeQuantity
on 100 ml & Strength on Strong --> 100ml water and 15g coffeeQuantity to
200 ml & Strength to Strong--> 200ml water and 15g coffeeThe

names "coffee quantity" and "coffee strength" suggest variant 1, but I suspect variant 2


.




I hope the question is clearer now.

It is clear that is variant two. Machine is programmed to grind 3 different amount of beans. And water quantity is adjusted according to taste.

Ok, fits. I had already thought. However, I do not like it. The instructions talk about "desired amount of coffee" etc.. That is then rather nonsense.

I can set the coffee strength (in reality the amount of beans) in 4 levels: Mild, Normal, Strong and Extra. And with the "amount of coffee" I can then fine-tune and then have to deal with the real amount. If I want to have a normal, but large coffee, I have to set the bean quantity to "Extra" so that the stuff is not too laff. And if you choose 20 ml and "Mild", it's anything but mild.... If Jura would have at least named this correctly and instead of "Mild" etc. "20 grams" or something, it would have been clear.

Are there machines that do this better? So with reasonable parameter designations and with a finer setting, ideally with integrated scale and a weight setting? And / or with a "relative" bean quantity so that "mild" is also mild, regardless of whether times 20ml or 200ml produced?

Not to my knowledge.
You can set how strong you want the coffee to be on the Rotary on the top before you draw it.
No fully automatic machine has a scale. There are machines with two grinders. You can then use two different beans.

Is there then a VA where I can freely set the reference time of the mill?

BTW:
I'm kind of impressed. Apparently, no one seems to care much. Occasionally, you can find various forum entries where people have similar questions and often meet with incomprehension. How can this be? There is no standard for the quantities. And at least Jura seems to keep the quantities behind the designations secret. Wonder what significance all these VA tests on the internet etc. have under such conditions.... Objectively and subjectively suspect. "The coffee from the Jura tastes better than from the Miele" No wonder, also uses a completely different recipe! Since I am no longer surprised by these lousy preparation recommendations of the coffee roasters. What a deplorable state of affairs. And that in the EU where every sh... is regulated. Imagine that in the automotive industry; "The performance(!) of the vehicle is adjustable via a pedal in "slow", "medium", "fast, "very fast"" and then no relevant technical data, but only so ala "Consumption: "low to very low" Oh, I digress ...