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La Pavoni undressed

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  • #31
    Re: La Pavoni undressed

    Originally posted by JavaB link=1170566881/15#26 date=1173249356
    Check your mail.... sent you some pages from the service manual.
    Havent gotten them yet. Ill check again in the morning.


    Java "Really going to bed this time!" phile
    Toys! I must have new toys!!!

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    • #32
      Re: La Pavoni undressed

      Java,

      Sent them to your CoffeeSnobs address.... so they SHOULD be there....

      One shows a cutaway of the group showing the machined channels within.

      Comment


      • #33
        Re: La Pavoni undressed

        It looks like Robusto will beat me to a working machine.

        The oneway valve may take a day or two to sort out.

        On the pressurestat side, the membrane was cactus (and home to a small cockroach family), so a new membrane will cure this 0.4 bar pressurestat swing, I hope.

        Im still endevouring to get it running by the weekend.... fingers crossed.

        Comment


        • #34
          Re: La Pavoni undressed

          Originally posted by JavaB link=1170566881/30#31 date=1173255390
          Java,

          Sent them to your CoffeeSnobs address.... so they SHOULD be there....

          One shows a cutaway of the group showing the machined channels within.
          Hhhmmmm....Still nothing in the mailbox. Ill have to do some digging to see what the problem is.

          On a happier note, now that Im awake and thinking/seeing clearly Ive redone the flow path picture showing the correct path.

          The water comes in starting at the big green dot. Following the green line the water then goes up the pipe which passes under (not through) the grouphead and into the top left side towards the front of the grouphead passing straight through to the upper right foward pipe where the pipe then loops around and passes behind the 3-way valve/solenoid and into the right side of the grouphead towards the rear. It then passes straight through the grouphead and out the pipe on the rear left side where it then loops around and is injected into the HX above and centered on the grouphead. The water is flash heated there and then follows the red line straight through the grouphead into the 3-way valve and from there it follows the yellow line to the showerscreen. At the end of the shot when the pressure relief (backflush) valve is opened the water then flows back following the yellow line from the showerscreen to the 3-way valve and then along the blue line from the 3-way valve out the flush pipe to the drip tray.


          Java "I can see clearly now..." phile

          Toys! I must have new toys!!!

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          • #35
            Re: La Pavoni undressed

            Originally posted by JavaB link=1170566881/30#31 date=1173255390
            Java,

            Sent them to your CoffeeSnobs address.... so they SHOULD be there....
            It looks like Ive got the problem sussed and it should all be sorted out and working properly sometime today.


            Java "One more problem solved!" phile
            Toys! I must have new toys!!!

            Comment


            • #36
              Re: La Pavoni undressed

              OK JavaB, fire that email at me again there please. Everything should all be sorted out now.


              Java "Problem solved!" phile
              Toys! I must have new toys!!!

              Comment


              • #37
                Re: La Pavoni undressed

                FYI on a side note Cimbali is now touting their no tamp feature on their newer model expresso machines.

                I was out doing a repair not to far from the local Cimbali dealer yesterday afternoon and decided to swing through just to verify that I had the water path correct and to pick up a new o-ring and gasket for my gravity valve.

                While waiting for them to pull the parts I made myself some drinks on their demo 3-group Dosatron. I did my usual dose and tamp only to discover that there was no way the portafilter was going to lock onto the grouphead. I commented to the tech on how much lower the showerscreen was than on my M28 and he stated that Cimbali had lowered the showerscreen so that it acted as a tamper when you locked the portafilter on. Eliminating the need to tamp before locking on and brewing. Ugh!

                A classical DOH! moment presented itself as I was grinding the beans and asked their new secretary who they were from as they looked and smelled old. She said they were Lavazza and I commented that they should really hook up with a local roaster and use good quality fresh beans for their demos. Her comment? "Oh no! We cant do that! These are espresso beans!!" DOH!!


                Java "Shaking his head in amazement" phile
                Toys! I must have new toys!!!

                Comment


                • #38
                  Re: La Pavoni undressed

                  Geez, Javaphile, youd expect that sort of attitude from the receptionist at the local new car showroom where they make you a coffee while the transfer papers are prepared....

                  But from a Cimbali dealership? > On second thoughts, it makes sense. The offing is supposed to closely match that would-be customers, i.e., cafe owners, are accustomed to. ;D

                  The "inbuilt tamper" is a worry. What would Greg Pullman say to that method. Seems like the puck is being screwed down by a shower screen rather than tamped.

                  Speaking of which....what a mess tht screen is going to become pronto.
                  Stick to the tried and proven traditional way, I say.

                  --Robusto

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                  • #39
                    Re: La Pavoni undressed

                    Originally posted by robusto link=1170566881/30#37 date=1173380564
                    Stick to the tried and proven traditional way, I say.

                    --Robusto
                    Yup, I agree!

                    Its sad to see the dealers reflecting the speed is more important than quality attitude you see in most cafes. They are doing absolutely nothing to increase the quality in the cup, only to increase the bucks in the cafes pockets.

                    The owner made the comment that you cant taste the difference in the cup between doing a manual tamp and letting the showerscreen do the tamp. He looked totally lost and confused when I pointed out that of course you couldnt, using the beans and equipment they had there. They use an automatic tamper (not a manual tamper in sight) that has a 52mm head to tamp a 58mm basket to far less then 30 pounds (maybe 10 pounds?), and theyre using stale old beans. Is it any surprise that you cant taste the difference?!

                    One of these days Im going to go over there with some fresh beans and my tamper to show them just how bad their espressos taste. They may know espresso machines like the back of their hands, but they obviously dont know sh!t about coffee.


                    Java "Gee, am I a snob or what?!" phile
                    Toys! I must have new toys!!!

                    Comment


                    • #40
                      Re: La Pavoni undressed

                      I dread to think what the ultimate outcome would be if you traced the thinking backwards .... from the attitude of the dealership...to the factory...to the engineers ... to the designers.

                      Temperature control? Pre-infusion? "Nah, they wont taste the difference. Use that thermoplastic for the group, its cheaper."

                      --Robusto

                      Comment


                      • #41
                        Re: La Pavoni undressed

                        It seems all the advances and tweaks the designers put into the machines to produce a better cup are rendered useless by the idiots on the end of the portafilter in most cafes.


                        Java "Doesnt order out for a reason." phile
                        Toys! I must have new toys!!!

                        Comment


                        • #42
                          Re: La Pavoni undressed

                          Originally posted by Javaphile link=1170566881/30#35 date=1173376180
                          OK JavaB, fire that email at me again there please. Everything should all be sorted out now.
                          Java "Problem solved!" phile

                          Java,
                          Email sent - better luck this time.

                          Robin.

                          Comment


                          • #43
                            Re: La Pavoni undressed

                            Originally posted by Javaphile link=1170566881/30#36 date=1173377847
                            FYI on a side note Cimbali is now touting their no tamp feature on their newer model expresso machines.

                            While waiting for them to pull the parts I made myself some drinks on their demo 3-group Dosatron. I did my usual dose and tamp only to discover that there was no way the portafilter was going to lock onto the grouphead. I commented to the tech on how much lower the showerscreen was than on my M28 and he stated that Cimbali had lowered the showerscreen so that it acted as a tamper when you locked the portafilter on. Eliminating the need to tamp before locking on and brewing. Ugh!

                            Java "Shaking his head in amazement" phile
                            No..... not another manufacturer of fine equipment succumbing to the almighty profit dollar- in this case their customers rather than their own.....

                            Its a pity someone who has - at least in the past - made excellent over engineered machines (like a two group with a 250L per hour pump ) has seen fit to support such shoddy cafe driven procedures....

                            More coffees per hour - more cr@p coffees that is...... but the punters wouldnt know a good coffee if it bit them as most have never had a good coffee as a bench mark....

                            The replacement dosertron board wasnt built to the same standard as the original either.... more "cost cutting"?

                            I guess La Cimbali will join the other disposable coffee machines before too long - certainly the groups will have to be with all that "self tamped coffee" - which wont be cleaned out properly by the cafe owners.....

                            UNBELIEVABLE

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                            • #44
                              Re: La Pavoni undressed

                              Originally posted by Javaphile link=1170566881/30#38 date=1173383969
                              One of these days Im going to go over there with some fresh beans and my tamper to show them just how bad their espressos taste.
                              Do it!

                              Comment


                              • #45
                                Re: La Pavoni undressed

                                Originally posted by JavaB link=1170566881/30#41 date=1173395018
                                Originally posted by Javaphile link=1170566881/30#35 date=1173376180
                                OK JavaB, fire that email at me again there please. Everything should all be sorted out now.
                                Java "Problem solved!" phile

                                Java,
                                Email sent - better luck this time.

                                Robin.
                                Nope, hasnt arrived. :-/

                                Youll need to send it by clicking on the email link on here again. Remove any old addy you may have for me from your address book. The link here had an incomplete address in it.


                                Java "It pays to check the simple things" phile
                                Toys! I must have new toys!!!

                                Comment

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