hello judge,
this is very interesting indeed. so it looks like this very long
pre-infusion is part of the brewtus iv vibrational pump design, unlike
any other brewtus.
i feel relieved that this is normal.
i wonder why they did it, only for the iv vibrational?
also thank you for your additional data. do you think the machine
performs better with larger dosage, or do you just like to updose?
i did read earlier that you are enthusiast about this machine. you don't
experience harshness in your cup?
and by the way, now that this is cleared up, i have one other question
about this machine. the steam boiler of mine never goes above 1.0 bar,
it actually stops around 0.95. does your machine cut off at the same
point, or does it go to 1.2 like all the other brewtus machines?
thank you very much,
guido.
Ok my results. An this is with the rubber plug that came with the
machine not a blind filter. Unit is set to 10 bar. Done both empty and
full of water. Sorry no blind filter, So I hope this helps.
Single basket 12.6 sec .(empty) 11.6 sec. (full)
Double basket 14.3 sec. (empty) 11.6 sec. (full)
VST 18g basket 14.5 sec. (empty) 12.0 sec. (full)
Triple basket 17.7 sec. (empty) 12.3 sec. (full) Note: could
never get triple basket to not leak a little with rubber plug so doubt
that is any use for times.
When I make espresso, I always use the VST basket with 18 grams of
coffee, I grind very fine, with a very light tamp. Around 10 lbs. I
use a naked portafilter and I see the beads of coffee start around
8-11 secs. I get my 2 oz. at around 8.5 bar in about 28-30 secs.
An on a final note over pre infusion, take a look at this video.
http://www.youtube.com/watch?v=K93RLmGkps4
Good luck
John
On Mar 24, 2:18 am, guido<[email protected]> wrote:
hello,
i noticed something in another thread, while trying to find out what is
wrong with my brewtus (or me, operating it) and i noticed something
peculiar.
my brewtus iv vibrational pump machine is very slow in building up pressure.
i watched a number of youtube videos of people making espresso with the
brewtus, and the coffee always starts dripping within 4-8 seconds.
i measured my machine, with a blind filter. it takes 11 second for the
pump to reach full pressure (about 9.5 bar with the blind portafilter).
that's about the same time when the espresso starts flowing with coffee
in the filter.
what i would like is for other people, with the same machine (brewtus iv
vibrational pump) to repeat this test with the blind filter for me and
give me the resulting time. this could help me a lot.
i could be on the wrong trail, or i could be dealing with a faulty pump.
the answer is hopefully in your replies.
another thing i would like to know, is there any way on this machine to
shorten pre-infusion time? i've learned a bit about pre-infusion from my
la pavoni manual lever, and 8-11 seconds seems very long time. with my
lever machine, about 5-8 seconds would be right. most other machines
seem to take this same amount of time for the first drops to appear.
this could be the answer to a problem i have been struggling with for
months. or not. it depends on your answers.
so, please, be so kind and test it for me. i would appreciate it very,
very much!
thanks and have a great weekend everybody,
guido.
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