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Thread: Automate a Rocky?

  1. #1
    Senior Member
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    Automate a Rocky?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi All

    I have a Rocky doserless and would like to Automate it in some way. Minimum would be to change the spring loaded switch at the front to a fixed switch ie: on and off so i dont have to keep it depressed to grind coffee.

    My real idea is to introduce some type of timing circuit so i can run the grinder for a set amount of time. I guess iam trying to make my own type of Mazzer Electronic.


    Has anyone heard or done any of the above?


  2. #2
    Senior Member
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    Feb 2006
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    2,334

    Re: Automate a Rocky?

    Yep. I built 6 grinder timers in 2007 for the 2008 Barista Championship season. Some ended up being sold, 2 were cannibalised and fitted to David Makins BNZ conicals for the 2008 World Barista Championship. All you need is a timer, a project box, a momentary SPST switch, some wire and some wiring capabilities - although I suggest you get a sparky to do it. Most of these timers have inbuilt relays so no need for a SSR. Just make sure that youre not pulling more current than what the inbuilt relays are rated for, otherwise you will need to use a SSR. That said these timers were used successfully on big conicals (Compak K10 WBC, BNZ conical).

    These timer boxes require no modification to the grinder if the grinder has a straight on/off switch (like the WBC/Pro Barista conical from Compak). Otherwise grinders will need to be rewired to just have a straight on/off switch. Then you simply plug the grinder in to the back of the box and power is supplied by an IEC power cord (computer power supply cord).

    As for the rocky, you will find plenty of sites which detail how to bypass the spring loaded switch.

    Im not going to detail step by step how its done because I dont want you to die if you screw up.


  3. #3
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    Re: Automate a Rocky?

    And the back.

    You can see the grinder 10 A plug, plugs straight in to the back of the unit and power is supplied by the IEC cable plugged in to the unit on the left.

    As for sourcing these digital timers you can go to RS components (my favourite place to shop) or grab a cheap one off Auber Instruments (should work well enough). If I had to build again, Id probably use Omon timers (super exxy!)

    Ignore the crooked tamp, it was my first competition *::)


  4. #4
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    Re: Automate a Rocky?

    Thanks David

    You have it down pat. Can you build one for me and if so how much would it cost


  5. #5
    Senior Member
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    Re: Automate a Rocky?

    The cost would come to half the price of your grinder and thats just in parts - not even considering the mark up for labour. I suggest:

    a) you build one yourself
    b) ask a friend to build one for you.



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