I am having somewhat of a similar problem, I am constantly brewing at 4-5 bar pressure. I am not getting much crema out of my shots, they are verry dark, oil like, and the crema doesn't begin until my shot are about 3 quarters extracted.
I've had my brewtus 4 - Vibe machine for a few months now and I am not happy with it yet. I am giving it some time to try to work out the bugs but I can't produce consistent shots with any sort of crema. I am using a Bartaza Vario - W as my grinder, at setting 1:(S-Z). This is a pretty fine grind setting for those of you who don't use Baratza Vario's. The problem I am having is the vibe pump almost always chokes if I were to tamp to hard or grind too fine. The Pressure bar raises up to 10-11 then the vibe pump almost sounds like it shuts off and the pressure drops to 4 then it slowly goes up again and then stops once the pressure gets up too high. Now the pressure drops as soon as the coffee begins to come out of the portafilter which would explain the pressure drop but I am wondering if this is normal. If I were to get a regular shot out of the Brewtus within the 25-28 second window the pressure gets up to 4 bar max. I am not getting much crema this way at all. I purchased beans from a cafe that they just used on their La Morcozzo machine and the crema it produced versus my machine was night and day. Do I have false expectations of what a prosumer machine can do? Will moving to a rotary pump do anything for me? On Apr 14, 10:21 pm, guido <[email protected]> wrote: > hello ben, > > sorry for the belated response, i've been ill. > > > Could it be that your grind finally gets saturated at the end, > > swells, and seals the puck allowing pressure to build? > > that could be, but if the pressure build because increased resistance > from the coffee bed, how does that explain an hugely increased flow > rate? that seem odd to me. > > best, > guido. -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/brewtus?hl=en.
