Cimbali D/1 circuit hack


Posted on Feb 5, 2014

By design, the pump will stop only if the volume set by the four position selector switch has been reached. Notwithstanding, it will also stop if: From what I think I understand, pressing `Pc` (brew button) sets it `closed` momentarily, sending power to `Ec` (group solenoid), `P` (pump) and `A` (relay coil) which sets `a` (relay contact) to `closed`.


Cimbali D/1 circuit hack
Click here to download the full size of the above Circuit.

This sends power to `Ce` (electronics box) where other relay/s take over, maintaining power to `Ec` (group solenoid), `P` (pump) and `A` (relay coil) after `Pc` returns to `open` when you let it go. Pressing `Pc` (brew button) again while the pump is working will not do anything as `a` (relay contact) will remain `closed` till the water level set by `Cd` (coffee dose selector) is met. My M30 Dosatron operates in the same way. Each group has 5 buttons - 4 dosing and one off/on. In order to stop a preset dose you have to press the off/on button and not the dose button you pressed to initiate it. My La Spaziale Rapid EK operates differently. You can start and stop any dose with the same button or the off/on button. I`m not sure why Cimbali opted this route but if there is a way to modify it to operate like the LaSpaz then I would love to try it out. To the extent of, when I first installed it, automatically and without a second thought insisting on stopping the brew by hitting the brew button a second time as I saw it go blonde. Still haven`t found another solution for the problem. But have encountered another problem. According to the manual (one sent to me through mail by Jorgen) backflushing has to be done by switching of the machine during a shot. This of course because there is no shot interruption. The second time I did this my boiler would not stop filling. A problem I still haven`t managed to solve. The solenoid valve...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    LX-800 LIGHTING SYSTEM
    Precision current sink
    100K megohm DC probe
    Balanced-modulator
    Analog Clock And Temperature sensor On An Oscilloscope using Arduino
    Dynamic Microphone Preamp
    AVR Interrupts and binary counter
    Simple Circuit Interfaces 1-Wire Temperature Sensor To A Microcontroller
    Solenoid Tutorial
    THREE FREQUENCY AUDIO OSCILLATOR
    One of reversing circuit reverse braking resistor in series with a DC motor armature start



    Top