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Tamping methods?????

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  • #16
    Originally posted by gibberblot View Post
    I don't think the polish makes any difference at all in the cup (not to my palate anyway), but it does clean any little grinds off the tamper.
    And it looks good.

    Comment


    • #17
      Originally posted by RayTCoffeePro View Post
      Hmmm i personally use the straight on 30lbs and polish....

      I use a 58mm flat base tamper with 1kg weight.....

      In what way do you tamp?

      Came here to discuss tamping science....
      Have a read of this thread. http://coffeesnobs.com.au/general-co...overrated.html

      Comment


      • #18
        I've used a 14 gram VST for my shots....

        I love the VST and that was when i was on a Silvia and had the PID and a flat grouphead showerscreen.....

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        • #19
          Now im using a Viebiemme at home....

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          • #20
            HI All,

            I have just done a overhaul on a viebiemme domo super and having a bit of trouble getting it back to where it should be.

            I have bitter shots .

            Pressure is at around 9 bar when pulling the shots.

            And I get about 30ml in 25 secs.

            I was thinking I should :

            Crank up the OT and make the grind coarser?

            Any suggestions?



            Comment


            • Ronin
              Ronin commented
              Editing a comment
              Bitter is caused by a few things.
              Roast level eg dark roast 
              machine running hot
              slow shots
              Your palate
              Dirty machine (needing backflust)
              Dull grinder burrs

              id day yours are on slow side but not drastically
              What dose are you using?

          • #21
            18g in a double

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            • #22
              Hi Ronin,

              Thanks for your response

              I've tried a couple of coffee beans and I am able to try in another machine - where I know its not bitter so..

              I could:



              Roast level eg dark roast - Checked and Ok
              machine running hot - decrease pressurestat ?
              slow shots- coarser grind
              Your palate- new tongue and mouth
              Dirty machine (needing backflust)- clean machine
              Dull grinder burrs- sharpened burrs - this shouldn't be an issue as I had this checked about 12 months ago and I would only put through about 10 kgs per year

              Does this list sound about right?

              Comment


              • Ronin
                Ronin commented
                Editing a comment
                Sounds right, get a new tongue and mouth transplant. Probably cheaper on the black market too
                Oh and you don’t sharpen burrs, you get new ones.

                Backflush the machine to make sure it’s clean and make the shots a bit faster (coarser grind)
                Without being there it’s about all that can be suggested. Test and try really
                Good luck

            • #23
              HI Ronin,

              Thanks I will give it a go - work through the list-

              Comment


              • #24
                "Oh and you don’t sharpen burrs, you get new ones."

                Sharpening burrs? something I've been meaning to investigate.

                In my distant past I used dreadnought rasps as well as farriers rasps, when they lost their edge we had them sharpened chemically, this could be done a number of times, whilst they were not quite a good as a new rasp the process certainly extended their useful life and was a real money saver.
                The burrs on a coffee grinder are very similar to the rasps I mentioned, there should be no reason why they cant be sharpened in the same way.

                I've done a quick search and it seems like the process can be carried out using citric acid.

                I'm just about ready for a burr change on the Mazzer, may well give the process a try, certainly nothing to lose.🙂

                Comment


                • WhatEverBeansNecessary
                  WhatEverBeansNecessary commented
                  Editing a comment
                  Might as well give it a go, worst case scenario you have to buy a new set of burrs which you would do anyway. Would be interested to see the results.

                • sp0rk
                  sp0rk commented
                  Editing a comment
                  I have a feeling that Citric Acid wouldn't take a lot of material off the face of the burrs, I use it a lot in "water purifier" construction and it really only removes oxides even on steel in my experience.
                  It'd clean them really well, but I doubt it would sharpen much
                  Phosphoric or Muriatic acid may be a better bet imho
                  if you're a homebrewer, some undiluted Starsan or Stellarsan should do the job

                • Yelta
                  Yelta commented
                  Editing a comment
                  I've got a set of new Mazzer burrs sitting on the shelf ready to install, will put them into service then have a play with the old set.

                  Muriatic acid was also mentioned, apparently pretty nasty stuff, also unsure of availability and cost, citric acid is cheap and readily available.

              • #25
                As an Engineer, I disagree with the value of sharpening burrs. If we are chasing uniformity and consistency, and spending thousands on machines and beans, it makes no sense to spend as much to do a half job of self sharpening as to buy new production made burrs. Just my 2c

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                • #26
                  HI All,

                  I have a Vibiemme (Super Manual) and have finally , (with assistance from Ronin ), got it pouring great shots.

                  Now I notice there is a bit of condensation in both of the gauges and the glasses on top get moist.

                  Opened it up and I think the anti vacuum valve need to be replaced or could it be the boiler safety valve ?

                  I have noticed that when pouring a shot - the pressure will sometime drop and the pump will start to operate - not sure why this happens - any ideas?

                  I have recently ( about 3 months ago ) rebuilt most of this machine - replaced most of the seals , pulled the boiler out and cleaned, replaced element, new controller.

                  Only things I didn't replace were the micro switches and the water level probe.

                  Any ideas??

                  Thanks Coffeed2



                  Comment


                  • Ronin
                    Ronin commented
                    Editing a comment
                    Good to hear you got it working
                    Is the condensation inside the gauge?

                • #27
                  Originally posted by Coffeed2 View Post
                  HI All,
                  I have a Vibiemme (Super Manual)
                  I have noticed that when pouring a shot - the pressure will sometime drop and the pump will start to operate - not sure why this happens - any ideas?
                  I have recently ( about 3 months ago ) rebuilt most of this machine - replaced most of the seals , pulled the boiler out and cleaned, replaced element, new controller.
                  Only things I didn't replace were the micro switches and the water level probe.
                  Any ideas??
                  Thanks Coffeed2
                  You mean as in when steaming milk - pump will kick in?
                  Is it rotary or vibe ?

                  BTW How did the transplant end up ? Doc did as good job ?

                  Comment


                  • #28
                    Face transplant went well- wife doesn't recognise me!

                    No Vibe pump kicks in when pouring shot

                    Comment


                    • Blues1143
                      Blues1143 commented
                      Editing a comment
                      Face/Off is such a classic film, love John Woo and doves.

                  • #29
                    No making much sense to me.

                    When you are pouring a shot the pump starts running as soon as you raise the lever??

                    Also it would be unlikely that the safety valve is leaking as the only usually do in over pressure situation 1.7 or 2 bar to save the boiler from exploding. The anti-valve being faulty or stuck would explain moisture and lack of steam power. You can try a couple of things, grab a plastic or wooden spoon and give it some decent presses and purge some steam to see if you can clear any debri (don't burn yourself). Remove the anit-vac valve when the machine is cool and give it a physical clean and/or chuck it in descaler for a few hours.

                    If you mean the pump stalls part way through a shot then either the pump is a dud (there are a few that are not bench tested and can fail out of the factory) or maybe you a problem with your OPV valve.

                    Comment


                    • EspressoAdventurer
                      EspressoAdventurer commented
                      Editing a comment
                      Originally posted by roosterben View Post
                      If you mean the pump stalls part way through a shot then either the pump is a dud (there are a few that are not bench tested and can fail out of the factory) or maybe you a problem with your OPV valve.
                      Can ad to Ben's list....Or MicroSwitch is faulty or needs re-adjustment to match the activating 'cam' on the lever.

                      So Did the Wife like/agree with the Surgeons' handywork ?

                      PS MAybe Coffeed2 means there is a rise in decibles / noise / pitch or tone during the shot ?
                      Is it a woop wwoop wwwoooooppp type sound Coffeed2? high pitch metallic sound?

                  • #30
                    no change in sound

                    I got a new anti vac - so i'll chuck that in

                    the other thing i thought it could be is the water level sensor so I'll put in a new one of those as well and give it a whirl.

                    Seems that its not my face that is causing the issue!!

                    It's my Attitude!!

                    Oh no!

                    Comment


                    • roosterben
                      roosterben commented
                      Editing a comment
                      Re the water level sensor, they are pretty basic but can get blocked with scale. Again you can just physically clean or throw in some descaler for a few hours. They are just a stainless steel rod with a plastic sleeve and a male spade terminal connector on top.

                    • Ronin
                      Ronin commented
                      Editing a comment
                      Did you get a face upgrade or go cheap & ugly lol
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