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Thread: I hope I havent hurt my Rocky grinder - Help!!

  1. #1
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    I hope I havent hurt my Rocky grinder - Help!!

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi,

    This is my first post, although Ive been lurking for some time now.

    I have a Rancilio Silvia and a Rocky grinder and have been pretty happy with the shots I have been producing, until now.

    All of my pucks are now wet and I am afraid that I have damaged my grinder. One day, right after adjusting the grinder, I noticed that the shot I was pouring was jet black and coming out really fast (with no crema what so ever). So, I went back to the grinder and tried to grind some more coffee, when suddenly it made a loud, screechy sound. I thought "this doesnt sound good" so I turned it off right away. When I went to go adjust the grind, I noticed that the last time I did the adjustment, the "step" wasnt properly locked into place. I gently wiggled it and it went back into place, no problem. Except, that my puck is now all watery and I never had this problem before. Im wondering if I need to re-set the grinder or something. I use to get beautiful puck with imprints on them from the shower screen and group head - now I just get slosh. The coffee itself is ok, but I think it was better before. The crema seems lighter, not the nice caramel colour I was use to.

    Ive also cleaned and reassembled the showerhead recently (now I understand why backflushing is needed - yuck!!), but Im pretty sure Ive put it all back together properly, and I was getting excellent shots after this cleaning (but before I did the funny thing to the grinder). So, I am wondering if the grinder is the problem.

    Ive tried:

    -adjusting the grind (up and down)
    -updosing (but Im not sure how much coffee I should be putting in - I may still be underdosing - does anyone have a picture?)
    - tamping hard

    None of this seems to be working. I miss my hard pucks!! Please can anyone help me?

    Thanks, Mary






  2. #2
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Hey Mary, Welcom to CS:)

    When you mention screeching sound... would that sound like metals touching each other because the burr came loose because the setting wasnt locked in place properly. If it was a metal screeching sound then you would probably have to get a new set of burrs.

    Probably not the best answer but someone will come.

  3. #3
    Senior Member Dennis's Avatar
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    Re: I hope I havent hurt my Rocky grinder - Help!

    I suggest you PM 2mcm for help - hes online now!

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    Re: I hope I havent hurt my Rocky grinder - Help!

    Hi Mary,
    One great thing with the Rocky is how easy it is to pull apart !
    If you remove the three screws that hold the plastic bean guard in place you can remove the bean guard and hopper and unscrew the top burr-set .. and have a quick peak if all is ok in there ..
    just remember to mark the ulocation of the upper burr so you know where to screw it back on (else your numbers on the hopper will be out of alignment).
    there is actually a link womwhere on here about how to clean the Rocky which goes through the process step by step

    BeanBrat

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    Senior Member robusto's Avatar
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Hi Mary, and welcome.

    If on the other hand the Rocky is OK, the sloshy pucks indicate underdosing. Try putting about 16-17 grams of grinds into the Silvia basket, tamping with a 14 kg force (use the bathroom scale) and see if that extracts in 25-30 seconds without being sloshy.

    If the coffee gushes out, use a finer grind, and try again.

    Good luck,

    -Robusto

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    TC
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Quote Originally Posted by robusto link=1173786400/0#4 date=1173822030
    Hi Mary, and welcome.

    If on the other hand the Rocky is OK, *the sloshy pucks indicate underdosing. *Try putting about 16-17 grams of grinds into the Silvia basket, tamping with a 14 kg force (use the bathroom scale) and see if that extracts in 25-30 seconds without being sloshy.

    If the coffee *gushes out, use a finer grind, and try again. *

    Good luck,

    -Robusto
    Agreed all- a sloppy puck is an indicator of underdose unless youre using tanbark grind instead of coffee! ;D

    Step one is to get the dose right for your machine- you might try something like the method I suggest in http://coffeesnobs.com.au/YaBB.pl?num=1167622442. Once your dosing is consistent, then you adjust grind to get the required extraction rate. If you have had your rocky apart to clean it, there is little chance that the actual grind number indicated on the hopper will be the same- ignore it!

    If youre hearing metal to metal with an empty grinder, chances are something went wrong when you reinstalled things and its time for a new set of blades- most probably unlikely though...

    Good luck!

    2mcm

  7. #7
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Hi,

    Thanks everyone for their replies. *The thing is, Ive been producing decent shots (IMHO) up until my grinder problem, so I am doubting whether it is a dosing issue. *Ive also taken a TAFE course on espresso essentials with Justin Metcalf, so I understand the essentials I think. *My last post may have been a little confusing - I havent ever cleaned my grinder, but I have cleaned my Silvia, so it isnt an issue of putting it back together correctly.

    This morning I tried really filling the basket. *To me, the grind seemed weird, more powdery than normal, even though Ive already moved its position up a notch or 2 since I heard that horrible sound coming out of my grinder. *After I filled the basket and tamped, I tried to lock it into the grouphead (hoping Im using the right terms, here), but it wouldnt even go in. *So, I took it out and noticed that half the top of the coffee stuck to the machine (frustrating!). *Ive never had this problem with "sticky" coffee before. *I notice that when I tamp it also sticks a little to my stainless steel tamper.

    Im thinking that I need to have a look at the grinder burrs, but I dont know what to look for. *How would I even know if they were damaged? *Im a bit mechanically challenged, so please bear that in mind, and with 3 young children running around my legs, Im afraid Ill chop my finger off. *Ill search for the "cleaning a Rocky" and see if that helps.

    Oh, and I think my beans are good - from Beans roaster in Fitzroy (Johnston St) and he told me they were roasted 1 week ago.

    Is there anyplace I could just take my grinder to and have someone experienced to have a look? *Chris, I wanted to have a demo of the Gene Cafe so maybe I could bring my grinder at the same time and kill two birds with one stone? *

    Cheers, Mary

  8. #8
    TC
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Mary- Id be delighted to assist- on both counts....give me a buzz and Ill have a look over it for you while we roast some coffee for you to take home 8-)

    CHris

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    Re: I hope I havent hurt my Rocky grinder - Help!

    Chris, that sounds like an offer too good to refuse! Ill send you an email to work out a good day/time.

    Thanks, Mary

  10. #10
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    Re: I hope I havent hurt my Rocky grinder - Help!

    Another successful sponsor / member relationship. Well done Chris and Mary.



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