pstam Senior Member Joined: 27 Jan 2004 Posts: 2,305 Location: Beijing Expertise: Professional
Espresso: ECM, SAN MARCO, EURO 2000 Grinder: MAZZER Vac Pot: YES Drip: YES Roaster: YES, HOME STYLE
Posted Tue Nov 13, 2012, 11:31pm Subject: My Lever Machine and Talk about the Cup Volume,,,,,,
Many years ago, when we talked about the definition of cup volume for espresso, someone said that the lever machines defined the cup volume for 30 ml by design. I didn't have the lever machine and couldn't talk much about it. But now, I had got the lever machines, and recognized that the cup volume for lever machines are not limited in 30 ml, even nearly to 60 or more.
How is about the cup volume of espresso, and the use of lever machines?
Peter in Beijing ------------------- http://www.kaffa.cn/ ------------------- I am looking for the way and the place to extend our trainning courses.
johnboddie Senior Member Joined: 28 Nov 2008 Posts: 147 Location: Virginia Expertise: I love coffee
Espresso: Brasilia Mini Classic,... Grinder: Rocky, KitchenAid Pro Drip: Cuisinart (non-grinding)
Posted Wed Nov 14, 2012, 7:28am Subject: Re: My Lever Machine and Talk about the Cup Volume,,,,,,
I'm not clear on what you are describing when you speak of "cup volume" of 60 ml. The volume of coffee that one gets in a single pull with a lever machine is limited by the capacity of the group. In practice, you will get less liquid in the cup as some of the water will be absorbed by the coffee in the portafilter.
The only instance where the cup volume might be varied is through the use of a commercial lever machine where the head is loaded by a volumetric pump. In this case, the cup volume could be adjusted and selected (probably for settings of a single (short) or double (long) shot).
pstam Senior Member Joined: 27 Jan 2004 Posts: 2,305 Location: Beijing Expertise: Professional
Espresso: ECM, SAN MARCO, EURO 2000 Grinder: MAZZER Vac Pot: YES Drip: YES Roaster: YES, HOME STYLE
Posted Thu Nov 15, 2012, 12:24am Subject: Re: My Lever Machine and Talk about the Cup Volume,,,,,,
Here I might get something wrong. Last time, I tried only for single dose handle. When I try the double one, I got two cups in 30 ml each. I have to try more about it. Thanks.
Peter in Beijing ------------------- http://www.kaffa.cn/ ------------------- I am looking for the way and the place to extend our trainning courses.
IMAWriter Senior Member Joined: 4 Jul 2002 Posts: 5,464 Location: Brentwood, TN Expertise: I live coffee
Espresso: Nothing at the moment Grinder: Vario-W,Preciso-Esatto/KyM... Vac Pot: Adcraft SS, Yama 8 cup Drip: Brazen.Chemex, Hario, Clever... Roaster: Behmor 1600, CO/UFO combo
Posted Fri Nov 16, 2012, 10:10pm Subject: Re: My Lever Machine and Talk about the Cup Volume,,,,,,
Hi Peter, Using maybe 16-18 grams of coffee, if you are doing the traditional lowering of the lever, locking it in for perhaps an 8-10 count, then raising the lever, still holding it lightly allowing it to rise, then letting go when you feel the pressured, the usual amount should be more than 30ml, unless you pull the cup. I can easily get 30ml-40ml, if I so choose, from my 49mm group (15grams of coffee) in a 28-30 second pull, counting from the first lever motion. In my case, as my lever machine is not spring loaded as is yours, I slowly raise the lever to the top, count to 10, then slowly lower the lever till I hit bottom, or see blonding. 40ml or so is my preferred amount, as I like more concentrated shots, but 60ml equals 2oz, which is a standard cafe shot, though I always ask for a bit les, usually 50ml. So, 60ml is not out of the ordinary, especially if you are pulling your shot into 2 separate cups...you get a nice 1oz (30ml) "single."
I would time your shots as I explained, and if your shot is going longer than 30 seconds, including the 10 second pre infusion at the bottom, maybe adjust the grind. The coffee should start as drips, usually after 4-5 seconds of the 10 count pre-infusion.
pstam Senior Member Joined: 27 Jan 2004 Posts: 2,305 Location: Beijing Expertise: Professional
Espresso: ECM, SAN MARCO, EURO 2000 Grinder: MAZZER Vac Pot: YES Drip: YES Roaster: YES, HOME STYLE
Posted Sat Nov 17, 2012, 9:29am Subject: Re: My Lever Machine and Talk about the Cup Volume,,,,,,
IMAWriter Said:
Hi Peter, Using maybe 16-18 grams of coffee, if you are doing the traditional lowering of the lever, locking it in for perhaps an 8-10 count, then raising the lever, still holding it lightly allowing it to rise, then letting go when you feel the pressured, the usual amount should be more than 30ml, unless you pull the cup.
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