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Bezzera BZ10 + Quamar. "Second" impressions

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  • #31
    Originally posted by Casa Espresso View Post
    Unfortunately now days with "drop shipping" so prevalent the second level of testing by the retailer doesn't happen, and yes sometimes a machine not up to spec slips through.
    Good news Antony,

    Many need to be educated about drop shipping and what I call "box sellers": i.e. their involvement in the machine is limited to picking up the carton, hoping for the best and either loading it into a car or truck for transport. For mine, that simply doesn't cut it.

    We will not let any espresso machine leave us without a thorough bench test- regardless of what may happen at the factory/importer. We find that we make adjustments to at least 50% of what passes across our benches. Whilst manufacturers and importers may well run some sort of testing, it all too frequently does not meet our standards.

    It's great when a machine tests well, but it's no surprise when one doesn't and we have also rejected machines which passed importer testing but cannot be made to meet our standards. If heartbreak is to occur, I'd much sooner it happen to us and not the client.

    It's just another thing to be aware of when you purchase espresso gear.

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    • #32
      Soo... just for my piece of mind.

      I'm hovering at 11bar at the moment for my BZ10, and get pretty good results. (first machine with a gauge)

      Should I be hovering at the 9 bar?

      Potentially a newbie question here.

      Comment


      • #33
        Yeah, that's all I want to know as well tanny. I'm more than happy with what I'm pulling at the moment. But just like all of us if there's something we can do to improve our shots further, we'd jump on it. I'm more than happy to adjust to 9 bar myself just want confirmation that it won't void the warranty. Otherwise a trip to casa might be on the cards

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        • #34
          Hello all,

          Have a read of this thread with regard to measuring group head pressure on an HX machine.

          http://coffeesnobs.com.au/brewing-eq...x-machine.html

          There seems to be a bit of worry here from people that don't understand what the pressure gauge is showing and its relation to the pressure at the group head.

          THEY ARE NOT THE SAME.

          The only true way to know the pressure at the group head is through a group head gauge. In many cases10 bar (or 11) may be 9 bar or so at the group head of an E61.

          That is why your machine should be bench tested by the retailer before it is sent out.

          Cheers

          Antony
          Casa Espresso

          Comment


          • #35
            Hi,
            For all the pressure related debates, I found this on youtube: m.youtube.com/watch?v=E4y4-E2aL3U
            It comes from the horses mouth, one the Bezzera sons.
            What I like is that he is not defending/selling a/his product, he just explains the engineering reasons why a higher pressure on domestic machines...
            The clip starts in German for about 30 seconds but after that is in English

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            • #36
              Still worth doing a proper setup with a Scace or similar device...

              Makes a hell of difference in the cup and to say nothing about the reduction in frustration at trying to overcome the vagaries of grinding and dosing with a 12Bar head pressure...

              Mal.

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              • #37
                Bezzera BZ10 + Quamar. "Second" impressions

                Hello all,
                A test like that is really not the way to measure group head pressure. The blind filter insert is only showing the pressure back at the gauge again.
                Pressure at the guage is quite often not the pressure at the group head.
                A scace device measures temperature.
                The correct way to measure group head pressure is with a group head pressure gauge , not with a blind filter back flush.
                A coffee technician or good retailer will have one of these when setting up a machine.
                Cheers

                Comment


                • #38
                  I've seen Scace devices advertised with both pressure and temperature detection...

                  Click image for larger version

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                  Mal.

                  Comment


                  • #39
                    Originally posted by benissimmo View Post
                    Hi,
                    For all the pressure related debates, I found this on youtube: m.youtube.com/watch?v=E4y4-E2aL3U
                    It comes from the horses mouth, one the Bezzera sons.
                    What I like is that he is not defending/selling a/his product, he just explains the engineering reasons why a higher pressure on domestic machines...
                    The clip starts in German for about 30 seconds but after that is in English
                    Engineering reasons? Sounds like BS to me...

                    Comment


                    • #40
                      Originally posted by MrJack View Post
                      Engineering reasons? Sounds like BS to me...
                      Yep, agree...

                      Maybe it's an Italian Marketing exercise...

                      Mal.

                      Comment


                      • #41
                        I get 11 bar also, mine is a 2016 model. Checked a few bz10 on youtube and some on 11 and some on 9 so more confused now. How many grams of coffee beans for a double shot on the bz10 is everyone using?

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                        • #42
                          Just a bit of an update about the bar pressure. Contacted Anthony from Casa espresso about bench testing my bz10, he insisted on doing it complimentary (top bloke).

                          Turns out 11 bar on the gauge roughly equates to 9 bar at the group head! Figured Tanny and Jbounce would be glad to hear this. And any one else worried also.

                          Thanks again Antony
                          Last edited by Owlee; 20 September 2016, 09:19 PM.

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                          • #43
                            Originally posted by PeteSzad
                            I bought a used BZ10 and it was terrible from day 1. I took it to a tech and he tested it to find out water was 85-92 degrees which is bad for any machine. He pushed up the temperature so it now runs bettet but still pretty bad. He said I need to pull shots just after the heater switches off to get near 95. That sux. Is there anything I can do to improve this or is this just what BZ10 is like? I think my dad might get this one as its ok for him and his lates and hot chocs.
                            Hello Pete,

                            If you need some help or advice with your machine feel free to contact us directly.

                            Happy to give you a complimentary assessment

                            Cheers

                            Antony

                            Comment


                            • #44
                              Originally posted by K_Bean_Coffee
                              Hi guys.
                              I found a moment to get a new BZ10 on the bench for a pressure test with a blind PF inserted. You will see the bench test certificate (from the Australian importer, Berazi) in the pic as well as the pressure at spot on 12 Bar at the gauge. ......so 12 bar at the gauge is the factory setting and it's normal and A OK / no problemo
                              Of course, pressure at the gauge is only an indication of normal function and isn't the same as pressure at the group head. I trust that Barazi optimised the group head pressure during bench testing.

                              I also took a quick video of the test. See here: https://youtu.be/XHxaBXogGbc
                              Hi all,

                              Just for the sake of accuracy, that test certificate is not from the local distributor. That is a European test certificate from the manufacturer before it was packed and sent.


                              Cheers

                              Antony

                              Comment


                              • #45
                                Originally posted by Owlee View Post
                                Just a bit of an update about the bar pressure. Contacted Anthony from Casa espresso about bench testing my bz10, he assisted on doing it complimentary (top bloke).

                                Turns out 11 bar on the gauge roughly equates to 9 bar at the group head! Figured Tanny and Jbounce would be glad to hear this. And any one else worried also.

                                Thanks again Antony
                                Hi Owlee,

                                Not a problem at all.

                                A quick pressure test showed the true group head pressure.

                                The difference occurs with the dynamics of vibration pumps and pressure loss through to the group head.

                                Admission that I did use your machine this morning to pull my morning shots!

                                Performed like a dream !!

                                Cheers
                                Antony

                                Comment

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