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Building a PID kit for Gaggia Classic

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  • #16
    Re: Building a PID kit for Gaggia Classic

    did you find any difference to the steaming Jim? my steam for some reason is now REALLY strong....makes a huge difference to the milk 8-)

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    • #17
      Re: Building a PID kit for Gaggia Classic

      Originally posted by 153E332331362239570 link=1238569278/15#15 date=1239403048
      did you find any difference to the steaming Jim? my steam for some reason is now REALLY strong....makes a huge difference to the milk  8-)
      I left the stock steam thermostat in charge of steaming, so no change.

      Jim

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      • #18
        Re: Building a PID kit for Gaggia Classic

        odd that mine is stronger as I left the stock steam thermostat in too....

        anyway..here is the finished result



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        • #19
          Re: Building a PID kit for Gaggia Classic

          Originally posted by 4C676A7A686F7B600E0 link=1238569278/11#11 date=1239331955
          the one that came with the PID had a 6mm threaded fitting which obviously wouldnt go into a 4mm hole
          Just to confirm: the Gaggia has a M2 (=4mm) thermostat hole?

          Just so I can order a fitting thermocouple...

          thx.,

          RJ

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          • #20
            Re: Building a PID kit for Gaggia Classic

            i believe it is M4 (which is 4mm) x0.7 (I think the thread pitch) and is 6 mm long

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            • #21
              Re: Building a PID kit for Gaggia Classic

              Thanks.

              Originally posted by 5E7578687A7D69721C0 link=1238569278/19#19 date=1240104261
              i believe it is M4 (which is 4mm) x0.7 (I think the thread pitch) and is 6 mm long
              4mm = M2 (http://en.wikipedia.org/wiki/Screw#Thread_standards)
              which, as I just found out, matches the Gaggia spare part diagram (http://www.coffeeparts.com/gaggia/gaggia2.html).

              RJ

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              • #22
                Re: Building a PID kit for Gaggia Classic

                interesting....i will PM you a link...

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                • #23
                  Re: Building a PID kit for Gaggia Classic

                  ahh I see you are looking at WRENCH size, not the diameter of the bolt which if you measure with some vernier calipers is 4mm..hence M4

                  upon close inspection of the parts page you linked to I see M4 under the thermostats, not M2



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                  • #24
                    Re: Building a PID kit for Gaggia Classic

                    Originally posted by 7C575A4A585F4B503E0 link=1238569278/22#22 date=1240135184
                    ahh I see you are looking at WRENCH size, not the diameter of the bolt which if you measure with some vernier calipers is 4mm..hence M4

                    upon close inspection of the parts page you linked to I see M4 under the thermostats, not M2
                    Apologies, I stand corrected.

                    RJ

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                    • #25
                      Re: Building a PID kit for Gaggia Classic

                      no probs...saved you from getting an incorrect thermocouple!

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                      • #26
                        Re: Building a PID kit for Gaggia Classic

                        Originally posted by 18333E2E3C3B2F345A0 link=1238569278/15#15 date=1239403048
                        did you find any difference to the steaming Jim? my steam for some reason is now REALLY strong....makes a huge difference to the milk 

                        Ive been thinking about why a pid on the brew temp might improve the steaming and I think the pid might help reduce the temperature stratification within the boiler as a side effect of making the temperature more stable over time. When the top of the boiler is at steam temperature then more of the water in the boiler is hot enough for steaming.

                        Maybe.

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                        • #27
                          Re: Building a PID kit for Gaggia Classic

                          Im sorry to dig this fossil up.. Thinking of PIDing my gaggia. Just cant make up my mind on the PID to get. Im going for the cheap ebay ones. Cant seem to work out whether Im misreading the ads or if some of the PIDs come with built in SSRs. Either way, I dont know if prices have dropped significantly in the past couple of years or if Im looking at the wrong things. But yeh looking for a rough price of 30-40AUD for the whole lot PID, SSR + thermocouple.

                          I know i shouldnt be really posting this but heres what im looking at.

                          Then dont post it. eBay link removed per site posting policy

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                          • #28
                            Re: Building a PID kit for Gaggia Classic

                            mompt.
                            Yes the chinese PIDs are available for $25 -$30 with TC and free postage, likewise SSRs for $5 delivered.
                            You can actually find the bigger sized PIDs for inder $20 !!
                            I havnt come across any PIDs witha "built in" SSR, but most of them do have a built in "mechanical" relay, but usually only rated for a 3A max load.
                            however, i recently fitted one of these chinese cheapies ( XMT 7100) to my Silvia before my SSR arrived and used the inbuilt relay to switch the heater ( 1100W = 4.5 A).
                            It worked fine, but i only did it after i inspected the PID and noticed that the internal relay was actually stamped with a 7 A rating by its maker ( Panasonic).
                            I have since installed the SSR to see if the functionality changes.
                            I would suggest you carefully chose the thermocouple type ( K, Pt, etc) and tip size, since i believe the placement of this TC tip can make a big difference in temp control.
                            Go for it !

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