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Gaggia Classic, steam and gurgling during frothing. Normal?

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  • #16
    Good luck with the tinkering of the PID settings. Keep us posted with your settings and experience with it.

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    • #17
      Interesting. You have steam control but only a single SSR? I don't have experience with the Auber, but all the DIY ones have one SSR for switching brew and one for steam.

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      • #18
        Originally posted by timmyjj21 View Post
        Interesting. You have steam control but only a single SSR? I don't have experience with the Auber, but all the DIY ones have one SSR for switching brew and one for steam.
        That is how Auber Instruments designed the kit they made for Gaggia. The steam control is via the PID alarm and just an on/off electronic switch and the default setting is 149C off/148C on and you will learn soon enough how to best use it with some sort of temp surfing to ensure having dry steam to froth your milk. My most reliable technique is to open the steam wand by half a turn and turn the steam switch on. Upon reaching 120C, I close the wand and wait until the ready light turns on and I purge the steam until the ready light turns off indicating the heaters are active. When the temp reaches it's lowest downswing at around 141-142C, I start steaming my milk and I will get to my desired milk temp of 62C without the heaters turning off. I have weighed my steamed milk and the added weight is always around 10% compared to other techniques that I previously used that added as much as 17%. How much steam water do you add to your steamed milk?

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        • #19
          I went through and checked the values in the PID now that I have some instructions on the use of it. I have changed some of them back to the suggested default settings according to Auber. Settings shown below.

          However this has not made any difference as the steam temp on the display still went up to 160 before dropping down again down to the mid-140's. As the settings for the steam were already at the suggested defaults then I guess I can only expect the same. I will try to lower these say 10 degrees and see how it goes.

          P - 4.0 (changed)
          I - 60 (changed)
          d - 15 (changed)

          SV - 102 (stayed the same)
          AH1 - 148 (stayed the same)
          AL1 - 149 (stayed the same)

          Inty - 4 (I tried the suggested PT100 but it didn't show temp on the display anymore so I put it back to 4)
          Corf - 0

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          • #20
            Ahh so the thermocouple you are using is not RTD PT100. What you have is most likely a DIY. You have the option to lower the AH1 and AL1.

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            • #21
              Is it worth adding the RTD PT100 to complete it perhaps?

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              • #22
                Nah! Just make use of it. Do you remember the old PID settings before you changed them to Auber's default values? Just compare performance for brewing. Nothing to do with the steam function. The wild swing during steam function is not really a big deal.

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                • #23
                  Bugger. I didn't note the values before I changed them to default. I'll see if I notice any difference tomorrow when I brew.

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