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Thread: Struggling to get a good shot!

  1. #1
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    Struggling to get a good shot!

    So ever since picking up my rancilio rocky doserless, I have since struggled getting my shot consistency. I recently pulled it apart, gave it a great clean and realigned it as zero as I could. I'm unsure if it's the dose amount, the grind size or the tamp but my shots are pouring super fast. Currently waiting on my new tamper and my scales, but the Puck seems to come out super wet. Using a sunbeam EM6910. Never really had an issue till now. I know grinding finer may fix it but I know tamping can also cause the issue, I am tamping evenly so I know its not a channelling issue. I will make a few shots tomorrow and take some photos and post if it's still happening. But I know it helps to have a consistent dose amount.

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    With a new grinder the best thing it to test all the variables. If your confident you have a consistent tamp pressure try different dose sizes and grind levels.

    Of course this doesn’t account for any change in the beans.

  3. #3
    Senior Member Stan's Avatar
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    Try fining the grind up. A wet puck is sometimes due to grind being to corse/stale beans But make sure when you are fault finding only change one thing at a time.

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    Cheers guys! Can buying a cheap bean from like aldi or Coles work with fixing the issues or does it have to be the decent bean I usually use to work it out? I know where you buy and how fresh your beans can change factors too

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    Senior Member Stan's Avatar
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    Not really use your current bean and fine up your grind. Remember as your beans age you need to adjust your grind accordingly.

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    The Aldi Lazzio beans are great for testing, cheap yet always reasonably fresh and can make a decent cup. I would not trust any of the Coles beans to give you a reliable result.
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    So! Gotten some aldi beans to adjust my settings on my grinder. I have scales and a nicer tamper now, but so unsure about when people say they're putting in 21g dosed into their portafilter basket, as my double shot single wall basket takes 60g to fill the basket level! What's the go with this? Is this correct? It's the sunbeam 6910 with the standard double basket. The shot seems to be pouring nicely but my rocky is also about 4 clicks from zero getting a decent shot! I have zeroed the machine and the burrs arnt that old at all!

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    Senior Member Stan's Avatar
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    I had a 6910 about 10yrs ago and vaguely remember I used about 25 grams for the single wall double basket. I now have an e61 and with the persuading basket I use about 24gms. I don’t know if this helps.

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    Quote Originally Posted by FilthySudo View Post
    ... my double shot single wall basket takes 60g to fill the basket level! What's the go with this? Is this correct? It's the sunbeam 6910 with the standard double basket. ...
    I have a SB EM6910 as well, and can't imagine how you're getting 60 g into the double basket.

    I am currently dosing with 18 g and get 54 g out (1:3) in 25-35 sec.
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    Quote Originally Posted by FilthySudo View Post
    So! Gotten some aldi beans to adjust my settings on my grinder. I have scales and a nicer tamper now, but so unsure about when people say they're putting in 21g dosed into their portafilter basket, as my double shot single wall basket takes 60g to fill the basket level! What's the go with this? Is this correct? It's the sunbeam 6910 with the standard double basket. The shot seems to be pouring nicely but my rocky is also about 4 clicks from zero getting a decent shot! I have zeroed the machine and the burrs arnt that old at all!
    The SB double has a nominal size of 16g. The 6910 can handle severe overdosing, however I doubt that the standard basket can fit anywhere near 60g. Perhaps you have a "ring in" rather than the original - wouldn't be the first I have seen. Look up the SB website and do a comparison.

    Grinder settings are almost irrelevant unless they are calibrated. Unless you run out of adjustment for your desired grind I suggest you ignore them other than as a guide for the next shot. If you do run out of adjustment then shim / recalibrate the grinder.

    TampIt

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    20180711_164118.jpg
    Here is a pic of my scales weighing the coffee in over 60grams, so unless these scales are completely wrong then...

    Edit: I will compare with other scales to see if these are way inaccurate, because by the sounds of things they are way out...
    Last edited by FilthySudo; 11th July 2018 at 03:56 PM. Reason: Added more to post

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    Senior Member Erimus's Avatar
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    Try putting some new batteries in. Inaccuracy is a sure sign of drained or faulty batteries.

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    Yep have a feeling it may be the cause
    Trying to get an item I can weigh to see if it's calibrated and accurate. The standard sunbeam tamper is weighing at 140g if anyone else is able to confirm this

  14. #14
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    Quote Originally Posted by FilthySudo View Post
    20180711_164118.jpg
    Here is a pic of my scales weighing the coffee in over 60grams, so unless these scales are completely wrong then...

    Edit: I will compare with other scales to see if these are way inaccurate, because by the sounds of things they are way out...
    Filthy, did you zero the scales after putting the empty portafilter on, or is the weight of portafilter + coffee = 63 grams. There is no way there is 63 grams of coffee in the pf unless you lace your coffee with lead
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    Quote Originally Posted by 338 View Post
    Filthy, did you zero the scales after putting the empty portafilter on, or is the weight of portafilter + coffee = 63 grams. There is no way there is 63 grams of coffee in the pf unless you lace your coffee with lead
    ���� No mate! My scales are way out of whack! They were originally saying my basket was weighing 87g,now when changing batteries it's about 24g. So yeah! It's the scales

  16. #16
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    It definitely sounds like scales

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    Senior Member Erimus's Avatar
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    A One dollar coin weighs exactly 9 grams. That should help you calibrate if your scales are accurate or broken.

    Do let us know the result....
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  18. #18
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    Quote Originally Posted by Erimus View Post
    A One dollar coin weighs exactly 9 grams. That should help you calibrate if your scales are accurate or broken.

    Do let us know the result....
    I'll let you know by trying it later tonight!

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