Hi CS,
I have just inherited two broken auto coffee machine from work, one is a saeco odea giro and the other one is a Delonghi Magnifica.
I have grand plans
I plan to strip out both boilers and pumps and shoehorn them into my antique italian expresso machine (also broken)
Basically i want twin boilers and pumps, one set for steam the other for shots
My plan is to control the temp and pressure precisely with robust electronics
95deg and 9 bar for shots, 120 deg for steam.
Now questions: do heater elements run on ac or dc and what voltage?
can you get adjustable thermostats?
do you really need closed loop control for temp? i was thinking of an open loop system whereas
for example say you had and adjustable thermostat and you set the boiler to 100. The heating element switches on then off when the temp reaches 100.
Now when you pull a shot the heating element is switched on when the pump is running, is this likely to overheat the shot, or will it just be enough to compensate for heat loss.
could not you play around with the power going to the heater so that precise temp is maintained though the shot?
cheers
Perfect (shot) Pat
I have just inherited two broken auto coffee machine from work, one is a saeco odea giro and the other one is a Delonghi Magnifica.
I have grand plans
I plan to strip out both boilers and pumps and shoehorn them into my antique italian expresso machine (also broken)
Basically i want twin boilers and pumps, one set for steam the other for shots
My plan is to control the temp and pressure precisely with robust electronics
95deg and 9 bar for shots, 120 deg for steam.
Now questions: do heater elements run on ac or dc and what voltage?
can you get adjustable thermostats?
do you really need closed loop control for temp? i was thinking of an open loop system whereas
for example say you had and adjustable thermostat and you set the boiler to 100. The heating element switches on then off when the temp reaches 100.
Now when you pull a shot the heating element is switched on when the pump is running, is this likely to overheat the shot, or will it just be enough to compensate for heat loss.
could not you play around with the power going to the heater so that precise temp is maintained though the shot?
cheers
Perfect (shot) Pat

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