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Thread: Lux grinder settings

  1. #1
    Ron
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    Lux grinder settings

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    This question is prompted by another poster who said he used the 1 setting on his Lux grinder for espresso. Now I assume the reference point for reading the setting is the clip that slots into the hole adacent to the number - but I use a 4 setting (or one "click" either side) into a Silvia (and LM) double basket - and with a decent tamp this easily gives a 25s plus extraction - in fact it sometimes can ghoke the machine if the tamp is too hard.

    Is this just confusion over where to "read" the setting or is the variation of grind so wide in one sample of this grinder compared to other samples? If I used a 1 setting on my grinder I think the basket holes would all clog up and certainly anything beyond the merest tamp would choke the pump.

    Ron

  2. #2
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    Re: Lux grinder settings

    Hi Ron,

    Setting 1 on my Lux (ie 3rd click from zero) with a decent tamp seems to work best for my Silvia when using Genovese or Atomica blend. Occasionally it will choke at this grind if I tamp really hard or perhaps if the beans are extra fresh, or perhaps because of temperature/humidity? But usually gives me 50-60 ml in about 25-30 seconds with a 14gr double basket.

    I notice that with home roasted beans I need to grind a bit coarser for the first day or so, but never coarser than 2.1.

    If I use the stock-standard Rancilio double basket (but keep the grind/tamp the same) the coffee comes gushing through a pale yellow and takes about 10 seconds for 50ml!!

    Maybe my Lux grinder is a freak (Its officially a Nemox brand - could this account for the difference?). Maybe my Silvia is a freak.

    It would be interesting to hear from other Lux/Nemox + Silvia users.

    Rob

  3. #3
    Ron
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    Re: Lux grinder settings

    Hi Rob

    When I got home tonight I noticed that if you take the grinder setting as as the number you see at the front of the machine - ie just behind the middle of the spout - it was "1". Is this where you are reading the setting from?

    The other possibility could be that when the "stop" screw was removed from your grinder the indicator dial was not replaced exactly as per the factory setting? This is all very interesting - tonight I managed to create fabulous shots for my wife and I from some Honduran beans from Single Origin with a grinder setting of 4 (ie at the point where the spring loaded locking mechanism is located) using a LM double basket.

    Maybe its just that the other variables are evening things out.

    Best

    Ron

  4. #4
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    Re: Lux grinder settings

    Hi Ron,

    No - like you, I read the setting from the left-hand side of the grinder, just above the adjusting clip thinggy, not from the front.

    When I turn the setting to as fine as it goes (ie to where it physically stops and wont go any further) it reads 0 at the left-hand side clip thinggy. What does yours read at the clip when you turn the setting as far clockwise (finest) as it goes?

    Rob

  5. #5
    Ron
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    Re: Lux grinder settings

    Same as yours Rob - must try a "1" grind setting tomorrow- maybe Im missing out on somrething here. Do you give it a decent tamp as well?


    Regards

    Ron

  6. #6
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    Re: Lux grinder settings

    Well, Ive never "measured" my tamp pressure, but if I use the 1 grinder setting and only tamp lightly the coffee comes through a bit too fast, so I give it a decent enough tamp.

    An interesting thing I noticed before I had a grinder: when I used to buy my coffee beans the people would be very sceptical when I asked them to grind it finer than for a commercial espresso machine. It would usually need to be set 3 or 4 settings finer. And recently I was at the Coffee Company buying coffee for someone elses Pavoni Europiccola - another ultra-fine-grind machine. I asked them to grind the beans finer than for a commercial machine and they suggested: "Ill grind it for a Rancilio Silvia, because they need a finer grind than the rest." Ahhhh, it felt good to be understood!

    Cheers,

    Rob

  7. #7
    Ron
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    Re: Lux grinder settings

    Well I tried a grinder setting of "2" this evening and it just doesnt work on my set up. All I got was a long "choke" followed by a drizzle of overextracted swill - and this was with a light tamp and then practically no tamp at all. I guess the conclusion must be that everyone must determine their own optimum settings for their own particular grinder and that this includes grinders of the same make (at least when we are talking about the Lux and even Rocky level of quality).

    Ron

  8. #8
    Mal Dimal's Avatar
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    Re: Lux grinder settings

    Hmmm,

    I think the "right" way to reach the ideal pour rate (Mal ducking behind the counter), is to set your grinder a little coarse to start with and then practice your tamping action so that you can consistently achieve a tamp force of say 12Kg +/- 2Kg. This is assuming a consistent dosing rate has already been achieved.

    Once youve got this level of consistency sorted out, you can start to examine the pour rate of your machine under varying circumstances.... grind setting, changes in ambient conditions, etc. You can start off with reducing your grind setting one step at a time from the slightly coarse setting already mentioned until such time as your pour rate starts to fall somewhere within the ballpark you are striving for.

    If you try to establish a benchmark grind setting coming from a too fine standpoint, you run the risk of bouncing off the Pressure Limiting Valve (PLV) which will then give you a false indication of the proper grind setting. Far better to do it from the other direction to ensure that it is the resistance of the coffee in the basket that is controlling the pour rate. You will find that a far better shot is produced coming at it from this way too.

    All the best,
    Mal.

  9. #9
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    Re: Lux grinder settings

    Hi Mal,

    What is a pressure limiting valve, and do you know if the Silvia has one?

    - Rob

  10. #10
    Mal Dimal's Avatar
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    Re: Lux grinder settings

    Quote Originally Posted by Robster link=1132799548/0#8 date=1133251695
    Hi Mal,

    What is a pressure limiting valve, and do you know if the Silvia has one?

    - Rob
    Hiya Rob,

    The Silvia most certainly has a PLV in its high pressure circuit. The purpose of this valve is to limit the pressure to which the pump is exposed, therefore protecting it.

    From what I understand, in experiments carried out by Sparky and a couple of other people, the Silvias PLV operates in the 13-14 BAR region and is not meant to be user adjustable. However, with the judicious introduction of a suitable thickness washer under the Valve Spring Retaining Cap, this pressure setting can be reduced to operate in the 8-10 BAR region that is ideal for pulling better quality shots.

    Although this valve is not intended to be used as a pressure control valve as such, many people have completed this simple mod to the ultimate improvement in the quality of shots they produce. If you think you would like to attempt this mod yourself, just send Sparky a PM and Im sure he will be happy to detail the steps involved.

    Cheers,
    Mal.

  11. #11
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    Re: Lux grinder settings

    Thanks Mal. I best not fiddle with what I dont much understand. Im happy to grind finer for the moment. I wonder why Rancilio designed Silvias this way . . . ?



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