Results 1 to 9 of 9

Thread: what is a PID?

  1. #1
    Junior Member
    Join Date
    Apr 2009
    Posts
    3

    what is a PID?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi , I am new to this forum, and have been puzzled by references to PID. Can anyone enlighten me, please?

    Thanks :-?

  2. #2
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,669

    Re: what is a PID?

    Welcome Fidget... [smiley=thumbsup.gif]

    A very quick Google search located the following information.... http://en.wikipedia.org/wiki/PID_controller 8-)

    Cheers,
    Mal.

  3. #3
    Junior Member
    Join Date
    Apr 2009
    Posts
    3

    Re: what is a PID?

    Thank you for this, but its all a bit technical. Does this mean there is a gadget I should get?

  4. #4
    Senior Member
    Join Date
    Jun 2005
    Location
    Newcastle
    Posts
    230

    Re: what is a PID?

    Try...

    http://www.espressomyespresso.com/
    *(specifically http://home.surewest.net/frcn/Coffee/Coffee63.html)

    http://www.pidkits.com/

  5. #5
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,669

    Re: what is a PID?

    Quote Originally Posted by 5B74797A78691D0 link=1240736152/2#2 date=1240742624
    Thank you for this, but its all a bit technical. Does this mean there is a gadget I should get?
    Well, it is a technical subject Im afraid and that Wikipedia entry has some references down near the bottom of the page, to simplified explanations that may be more to your liking. In a nutshell, a PID Controller allows for very specific and accurate control of a process variable, be that the "Cruise Control" found in many cars these days and including Boiler Control from very large right down to very small units such as we use in espresso machines. These days, Digital Technology has made it possible to produce a wide range of very economical controllers and it is a basic version of these that is used by coffee enthusiasts and snobs like us ;).

    And NO, they are not necessary or even suitable for every type of espresso machine out there and in the situation where you purchase a well known and properly setup machine from a reputable specialist retailer (such as any one of our esteemed Site Sponsors), the machine you purchase will perform as designed right out of the box when unpacked on to your kitchen benchtop.

    People opt to fit PID Controllers on Dual Purpose Single Boiler machines (such as Rancilio Silvias, Gaggia Classics and Nemox Fenice for example), mainly for convenience as it allows one to basically walk up to such a modified machine (after its had an hour or more to warm up properly) and pull excellent quality shots right from the outset; provided of course that high quality, freshly roasted coffee is used and a decent grinder is then used to grind only that amount you intend to use immediately. Ground coffee goes stale within a matter of a very few minutes.

    My advice would be to visit a reputable specialist retailer and get a hands-on demo of the machines that fall within your budget and of course, sample the coffee produced by each of the machines you try. Its what is in the cup that counts, after all..... 8-)

    Mal.

  6. #6
    Senior Member greenman's Avatar
    Join Date
    May 2007
    Location
    Perth, Western Australia
    Posts
    3,155

    Re: what is a PID?

    What sort of machine are you using Fidget?

  7. #7
    Junior Member
    Join Date
    Apr 2009
    Posts
    3

    Re: what is a PID?

    I have just bought a 2009 Silvia, after having a Saeco Via Venezia for a couple of years. I have been concerned that the frothing on the Silvia might be substantially different to previous models because of the fact tthat it now has 3 holes instead of just the single one of the previous model. I had not had much luck producing microfoam - just got either nothing much, or lots of bubbles.

    However, I have read some of the previous advice about purging the steam wand BEFORE the light goes out, and also about placing tthe wand in the centre of the jug, rather than to the side as I needed to do with the previous machine. This method did produce something quite a bit better than I had been getting. I will keep trying and will take myself off to a course soon.

    Thank you to all for your advice.

  8. #8
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: what is a PID?

    Fidget,

    The PID wont make much, if any, difference to the milk side of things (a PID with steam control helps very slightly in getting increased steam volume but its not a big difference). It just gives you a more stable water temperature which helps with espresso quality.

    There are various tips such as what youve mentioned for the Silvia, but regardless of whether you purge before or after the light goes out, or put the tip at the centre or edge of the jug, youll be able to get good microfoam with practice. There are lots of little variables that can make any of those work, including the angle the jug is held at and the depth of the wand in the milk. Just try to keep the milk circulating and suck small amounts of air into the milk. Dont break the surface and allow big bubbles. The Silvia I just sold had a 3 hole tip and I was able to get good results regardless of where the wand was in the milk.

    Greg

  9. #9
    Senior Member
    Join Date
    Feb 2009
    Posts
    268

    Re: what is a PID?

    i just used my new silvia and got the hang of it 2nd go, first was a bit flat but pressure is good. try using the steam with the heating light on, boosting the pressure a bit by heating at the same time.

    someone please correct me if i am wrong, might have read wrong



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •