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Thread: Trouble with the Nemox Dell Opera grinder - not fine enough

  1. #1
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    Trouble with the Nemox Dell Opera grinder - not fine enough

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have recently started having trouble with the grinder in my Nemox Dell Opera. Or at least I think its a problem.

    I used to have it set to about 3 (I realise not all grinders are set to the same number but are a guide) and it used to give me good/reasonable pours. This was with fresh beans (bought from site sponsor Dibella or my home roasted beans). Recently my pours have become very fast and I have had to fine up the grind to get a good pour (trying to keep the dose/tamp the same).

    I have had to drop it down to the number 1 (finest) recently and the pours are still to fast. I am still tamping with the same method and pressure as before.

    I have since grinded using my Kyroca Hand grinder and have choked the machine on 4 occasions, each time stepping out a notch on the grinder.

    Not sure what to do or how to fix this. Is this a problem that the grinder cant choke the machine on almost the finest setting?

    Any advice or recommendations welcomed.

    Regards,

    10ett.

  2. #2
    A_M
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Quote Originally Posted by 6465302121550 link=1260748452/0#0 date=1260748452
    I have recently started having trouble with the grinder in my Nemox Dell Opera. *Or at least I think its a problem.

    I used to have it set to about 3 (I realise not all grinders are set to the same number but are a guide) and it used to give me good/reasonable pours. *This was with fresh beans (bought from site sponsor Dibella or my home roasted beans). *Recently my pours have become very fast and I have had to fine up the grind to get a good pour (trying to keep the dose/tamp the same).

    I have had to drop it down to the number 1 (finest) recently and the pours are still to fast. *I am still tamping with the same method and pressure as before.

    I have since grinded using my Kyroca Hand grinder and have choked the machine on 4 occasions, each time stepping out a notch on the grinder.

    Not sure what to do or how to fix this. *Is this a problem that the grinder cant choke the machine on almost the finest setting?

    Any advice or recommendations welcomed.

    Regards,

    10ett.
    Same batch of beans... ie... How old are they... As Beans age that also get soft and you have to make ya system grind finer.. Only buy enough beans for a week at best... If ya buy a Kg and takes ya 3 weeks to use... Then by about day 10.. you will be needing to make sig changes...


  3. #3
    Senior Member Lovey's Avatar
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Another alternative, are you using beans that are veeerrry fresh, ie within a couple of days after roasting?
    Ive found that the pours with ultra fresh beans are much quicker than those done with older beans (due to a lot of CO2).
    Have you pulled the grinder apart recently for cleaning?
    You may have some grounds built up which is stopping the grinder from adjusting finer.
    Most importantly, how does the coffee taste?
    Fast or slow pour (within reason) if the tastes is good, who really cares what the pour looks like.

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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Thanks for the advice AM and Lovey.

    AM - Beans are very fresh. they would be under 7 days old (probably to fresh). I usually only put a small amount in the hopper (enough for a shot or two).

    Lovey - I thought I had been keeping it clean, until today. I thoroughly cleaned it out by removing the burrs and I was amazed at the grind build up. I thought I had a good cleaning routine with it, but I was sadly mistaken.

    I thought once putting it back together that this would grind fine enough to slow the pour. Unfortunately this wasnt the case. With the grinder set to 1ish I still had slightly fast pours. They do still taste good (to me) but they do blonde early meaning I am pulling them shorter then normal.

    Not sure if it is the freshness of the beans, a grinder fault, or something else completey (ie, me).

    Thanks,

    10ett

  5. #5
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Does it go past 1? there may be some room to move past the actual settings. it may also be that the grinder burrs are starting to dull (not sure how much use it has had) and as the burrs dull you have to change the setting to accommodate.

  6. #6
    Senior Member Lovey's Avatar
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Quote Originally Posted by 0607524343370 link=1260748452/3#3 date=1260761549
    They do still taste good (to me)
    Thats all that counts :).
    but they do blonde early meaning I am pulling them shorter then normal.
    Early blonding can be a sign of channeling in the puck.
    When youve pulled a shot, remove the group handle and press down on the puck. The puck should feel fairly solid and not have any obvious weak spots in it.
    Next, knock the puck out and have a look at it and check for signs of channeling, mainly around the sides of the puck (they look like worm holes).

  7. #7
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    The hopper on my Quaha Napletana II does not lock into a particular position, you just push it down into place in any orientation. The numbers on the hopper then are completely arbitrary and only there as a guide.

    Im not sure if the hopper on the Dell Opera (or other variations of this machine) use the same approach.

  8. #8
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    Re: Trouble with the Nemox Dell Opera grinder - not fine enough

    Thanks for the responses.

    The hopper doesnt move past 0 becuase there is a stopper on the dial. When I removed the burrs I could spin it a bit tighter. I suppose this means I could snap off the stopper, but I would be worried about the burrs toughting and causing damage.

    The hopper is secured with a screw so it always goes back in the same position, so even though a guide it is a constant guide.

    After giving the grinder a really good clean out I set the grind as fine as could go, and choked the machine. I have since backed off a bit and am getting better consistent pours.

    I guess I am still a bit confused as to why the grinder has suddenly dropped from around the 2.5 mark to the 0.5 mark. Keeping in mind the count on the hopper only goes to 7 (full diameter).

    I dont know how many kgs of beans have been through the grinder as I bought it second hand. It appeared relatively new when I got it so it, and Ive been making a double a day for about 6 months. Im not sure how much a set of burrs should be able to handle before needing replacing. they still feel sharp enough when scraping on the finger.

    Oh, well. I guess I should be happy that I am back with some relatively good pours.

    Thanks for the help.

    10ett



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