Announcement

Collapse
No announcement yet.

Sunbeam EM6910 - Sour Espresso = Temperature Issue?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Sunbeam EM6910 - Sour Espresso = Temperature Issue?

    Hey guys,

    Ive recently made the transition from milk based coffees, to short blacks.
    What Im noticing is quite a prominent sour taste in all the shots I pull. Its not an occasional thing, but rather a constant one.

    My current situation:
    - Sunbeam EM6910 Machine, with temperature set to max (+4 degrees)
    - Machine warmed up for at least 45 mins prior to use, with group handle locked in.
    - Cups prewarmed with hot water
    - Mahlkonig Vario grinder with freshly roasted beans
    - Pulling great looking shots, no distinct signs of channeling (though I cannot be definite without a naked pf) - usually around 50ml extracted before blonding

    I am currently at wits end, as I cannot seem to achieve this perfectly tasting espresso,

    Open to all suggestions,

    Cheers,
    Jayson

  • #2
    Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

    Hi Jayson,

    I have a similar setup to you.  I was getting getting sour shots a while ago, but grinding finer and increasing the temp to +2 degrees seemed to fix it.  I find that I get best results when I extract shots in around 30+ secs.  I still cant drink short blacks though, the taste is too acidic... but I suppose that could just be the beans Im using.

    Comment


    • #3
      Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

      Hi Jayson,

      I have the same problem with mine and I am sure it is to do with temperature. Someone more technical will probably be able to explain it! I use a fine grind with a lighter tamp and dose which seems to help. But I still get sour "lemon peel" taste on some shots.

      Cheers,
      Ben.

      Comment


      • #4
        Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

        Maybe you should test the water temp coming out of your group head..
        http://coffeesnobs.com.au/YaBB.pl?num=1266222481

        Comment


        • #5
          Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

          Originally posted by 5358404A5657555C564E390 link=1299667325/0#0 date=1299667325
          freshly roasted beans
          Please define ? Fresh Roasted

          Also what is your head Temp set to ?

          When did you last do a Full and Correct Clean ?

          Comment


          • #6
            Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

            Thanks for the responses guys,

            Yash - Unfortunately my machine is already on the maximum temperature setting, so that cant be modified any further. Im finding that I cant slow the pour down with a finer grind without choking the machine.

            AM - Current blend from CoffeeHit, 4 days post roast.
            The default for the Sunbeam is 92 degrees I think, and Ive increased it by 4 (the max), so that would be 96.

            My last Full clean was a week and a half ago,
            I took out the two screens and gave them a scrub, and chemical cleaned with a cafetto.
            And the last descale was at the end of December.

            Thanks,
            Jayson

            Comment


            • #7
              Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

              Originally posted by 3E352D273B3A38313B23540 link=1299667325/5#5 date=1299752597
              Im finding that I cant slow the pour down with a finer grind without choking the machine.
              1: Check your sweet spot

              2: Drop ya Group temp and try as a test.

              Sour can be an issue due to Temp but it can also be other things.

              I am running about 89 at the moment with my current roast and it gives a good cup.

              Not sure but Light roast = higher temp and Dark roast can work well with a lower temp.

              Grind / dose and Tamp also sneak in and cause further issues. 4 days post roast... Some of my beans would not be worth even grinding at 4 days. Thus not being of that establishment. Then you can only assume all is OK. Mind you I have been told teh same and the beans have been the cause.

              Nothing tike home roast as your then in the loop as to the reay status of the beans.

              Let us know how you go.

              Comment


              • #8
                Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                Originally posted by 3D362E2438393B323820570 link=1299667325/5#5 date=1299752597
                Im finding that I cant slow the pour down with a finer grind without choking the machine.
                There are two ways to slow down a pour.

                1/ Finer grind
                2/ More coffee

                If you have no room to dose more, then grind finer and to offset the choking use less coffee.

                Comment


                • #9
                  Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                  Eliminate variables one by one...

                  Get your hands on an Espro or Demaral

                  Espro, double basket, mound, tap, mound again, flat sweep then tamp to click.

                  Now you can isolate other issues.

                  Comment


                  • #10
                    Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                    AM -
                    My sweet spot seems to be around 2 - 3 oclock on the gauge, and when I pull shots it does sit around there nicely.
                    I tried dropping the temp a couple of days ago, and the sourness still persisted.
                    I would love to homeroast, but still being relatively new to this hobby, Id rather hold off from introducing yet another variable.

                    TG -
                    Im finding at my current 19g dose, Im seein a very faint imprint of the showerscreen on the dry puck.
                    I dont want to overdose as I think this causes unnecessary wear on the collar?
                    I will try 18g and 17g doses tomorrow with a finer grind and see how that goes,


                    thanks again

                    Comment


                    • #11
                      Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                      I would also grab some other beans.

                      Comment


                      • #12
                        Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                        Originally posted by 3B3028223E3F3D343E26510 link=1299667325/9#9 date=1299756645
                        TG -
                        Im finding at my current 19g dose, Im seein a very faint imprint of the showerscreen on the dry puck.
                        Then thats the limit (for that bean/blend).

                        Originally posted by 3B3028223E3F3D343E26510 link=1299667325/9#9 date=1299756645
                        I dont want to overdose as I think this causes unnecessary wear on the collar?
                        Agreed; hence my previous comment.

                        Originally posted by 3B3028223E3F3D343E26510 link=1299667325/9#9 date=1299756645
                        I will try 18g and 17g doses tomorrow with a finer grind and see how that goes
                        Ive been experimenting over the last week or two with lower doses.

                        So far all is good and Im finding some unexpected benefits.


                        Comment


                        • #13
                          Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                          Originally posted by 5B747D7F68577B747B7D7F777F746E1A0 link=1299667325/10#10 date=1299757080
                          I would also grab some other beans.
                          Yeah, Im planning to pay a visit to BBB in Melbourne, and maybe pick up their beans.

                          TG -
                          What are some of the benefits youve found with lower doses?
                          To what extent are you lowering the dose? eg. do you end up with a sloppy puck?

                          Comment


                          • #14
                            Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                            Originally posted by 4348505A4647454C465E290 link=1299667325/12#12 date=1299758473
                            To what extent are you lowering the dose? eg. do you end up with a sloppy puck?
                            I prefer the taste of smaller dose doubles but find I need to use at least 17 grams to get an OK puck.  18 grams gives a better puck but still very brittle.

                            Originally posted by 4348505A4647454C465E290 link=1299667325/5#5 date=1299752597
                            Yash - Unfortunately my machine is already on the maximum temperature setting, so that cant be modified any further. Im finding that I cant slow the pour down with a finer grind without choking the machine.
                            I was actually suggesting you check your machine to make sure its not faulty.  Ive read of some 6910s not producing hot enough water.

                            Comment


                            • #15
                              Re: Sunbeam EM6910 - Sour Espresso = Temperature Issue?

                              I know it depends on the beans, but I find 21g gives me the shot and taste I like. The puck is nice and dry and the crema is great. Anything above 21g puts too much pressure on the collar and anything below that leaves a wet puck and pours too fast.

                              I run at factory settings and use a Dema.RAL tamper for set and forget tamping.

                              When I change beans or the humidity changes I just need to adjust the grind.

                              Comment

                              Working...
                              X