i did not change my pump. i merely adjust the OPV pressure while using a blind portafilter.
after that, no more bouncing pressure during extraction. cheers! On Wednesday, 6 June 2012 14:42:02 UTC+8, gshokar wrote: > > 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? -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To view this discussion on the web visit https://groups.google.com/d/msg/brewtus/-/afLOSdhbupwJ. 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.
