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Thread: Kickstarter PID

  1. #1
    TC
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    Kickstarter PID

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Looks like it could have some potential.

    Not so sure about the claimed pressure profiling elements though.

    https://www.kickstarter.com/projects...ategory_newest

  2. #2
    Senior Member Dragunov21's Avatar
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    Interesting...

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    Quote Originally Posted by Talk_Coffee View Post
    Not so sure about the claimed pressure profiling elements though.
    I suspect they're targeting vibe pump machines and they achieve "pressure profiling" by pulsing the pump a'la the Auber PID "with preinfusion".

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    Caffeinated kopigeek's Avatar
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    Seems interesting. Love how they dropped water all over the power board.

  5. #5
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    Quote Originally Posted by jbrewster View Post
    I suspect they're targeting vibe pump machines and they achieve "pressure profiling" by pulsing the pump a'la the Auber PID "with preinfusion".
    My thoughts as well. Not what I call pressure profiling

  6. #6
    Senior Member Dragunov21's Avatar
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    Quote Originally Posted by Talk_Coffee View Post
    My thoughts as well. Not what I call pressure profiling
    I initially thought the same, but they're talking about "dimmer" operation, so possibly voltage regulation? Not sure how that plays with vibe pumps, but I'm with you in that I'm not confident it will be particularly meaningful.

  7. #7
    Mal Dimal's Avatar
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    I imagine a few people adept at using and coding Arduino or Raspberry Pi systems could achieve a controller that accomplishes all of this while keeping it compact and all inclusive, for quite a small amount of money. Packaging and promoting it would then be an exercise in itself of course; I imagine that this project has been developed along similar lines...

    Quote Originally Posted by Dragunov21 View Post
    I initially thought the same, but they're talking about "dimmer" operation, so possibly voltage regulation? Not sure how that plays with vibe pumps, but I'm with you in that I'm not confident it will be particularly meaningful.
    For this level of control in a vibe pump (probably across a very narrow range) one would have to be able to proportionally control frequency inversely, in concert with voltage. Voltage control on its own would probably be very limited in effectiveness and more than likely, shorten the life of the pump...

    Mal.
    Last edited by Dimal; 11th May 2015 at 05:21 PM.

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    Quote Originally Posted by Dragunov21 View Post
    I initially thought the same, but they're talking about "dimmer" operation, so possibly voltage regulation? Not sure how that plays with vibe pumps, but I'm with you in that I'm not confident it will be particularly meaningful.
    Yeah, I'd say that they're talking about PWMing their SSRs (which is not something I'd generally recommend but hey, if they ship the right kind of SSRs it should work ok for the boiler at least), not sure what impact that would have on a vibe pump though.

    That said, ISTR seeing somebody at some point using a standard light dimmer to try to control the pump in a Silvia, not sure how successful (if at all) that was.

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    Dear Coffee Snobs,

    Would it be accepted and appreciated if we would join the thread to clear some things up?

    kind regards,

    Jan
    Last edited by Andy; 13th May 2015 at 09:46 AM. Reason: user requested edit
    Dimal, MrJack and Dragunov21 like this.

  10. #10
    Senior Member chokkidog's Avatar
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    Welcome to CS Jan!

    Your project? We would love to hear from you!
    Dragunov21 likes this.

  11. #11
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    Behmor Brazen - $249 - Free Freight
    Thank you, nice community you guys have going on here. It is my project indeed.

    Regarding controlling the (vibration)pump pressure : currently we are doing this by Faseaansnijding - Wikipedia ( don't know the english translation ). This might not work for really low pressures, but it certainly works for moderate pressure.

    An alternative approach would be to skip some phases : the hardware supports this too and the firmware is field-upgradable.



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