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Thread: Thinking of converting K6 to doserless...

  1. #1
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    Thinking of converting K6 to doserless...

    Rather than wasting coffee in the grinders exit chute and doser every day, Ive been toying with the idea of modding my old (but good!) K6 to a doserless. I was planning on removing the doser altogether, replacing the existing cutout switch with a pressure switch for grind-on-demand, and filing out the exit chute so it is angled downwards rather than horizontal. Any thoughts/suggestions/past experience before I get started?
    Cheers, Steve

  2. #2
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    Re: Thinking of converting K6 to doserless...

    Are you planning on manually sweeping out the chute after each session? Im not familiar with the chute in the K6, but at a guess, Id expect a larger exit chute is just more room for grinds to sit in since once they enter the chute it moves out more or less first in first out, and all coffee will move with less velocity (although possibly the coffee on the top or bottom will move with less velocity), I predict it wont neatly slide down leaving a nice clean sliperydip, they will just bunch up in a larger area. This is only what my crystal ball reports back regarding the subject. Happy to learn the results if you try it!

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    Re: Thinking of converting K6 to doserless...

    You wont be able to file out the exit chute - its a relatively thin-walled rectangular tube protruding from the grind head casting. Once you get the doser off youll see a rubber fitting that sleeves over this tube and seals the hole in the grinder body where the chute comes out. To convert to doserless Id be looking at making a rectangular outlet chute that is a snug slip fit over the existing outlet casting and angles downwards steeply as soon as it is past the end of the existing casting.
    If possible, make the chute so that it tapers from a small cross-section to a larger one as it heads down, to make it harder for coffee to clog it.

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    Re: Thinking of converting K6 to doserless...

    I already sweep the chute every day, but suspect angling it downwards will actually allow coffee grinds to fall out of their own accord. I know that the casadio instantaneo has an angled chute and apparently its grind retention is absolutely minimal. Thats the basic design Id be aiming to replicate. Again, keen to hear of any similar experiences. :-)

  5. #5
    Sleep is overrated Thundergod's Avatar
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    Re: Thinking of converting K6 to doserless...

    Im not familiar with the K6 chute but the chute on my Macap is fairly horizontal.
    Im happy with the dosered version as its possible to clean out the chute after each grind with a few pumps on the hopper lid and a quick brush.
    I get close to zero retention.

    Rather than go to the trouble of converting I recommend looking at changing your routine.

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    Re: Thinking of converting K6 to doserless...

    Mod now complete!!!* Total cost, less than $1; total time taken, 30 mins.* Completely reversible should I ever wish to sell/go back to doser version!!

    Basically just remove the doser mechanism, cut a piece of 1" food-grade PVC tube, heat said tube in boiling water for a few minutes to soften it, stretch one end to aid in fitting over the exit chute, push tube deeply onto exit chute, sit back and admire your handywork!!* NOW I have virtually zero retention without needing to brush/pump/blow the chute out.

    See pics below for the final product.





    AdrianN likes this.

  7. #7
    CoffeeSnobs Owner Andy's Avatar
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    Re: Thinking of converting K6 to doserless...

    Quote Originally Posted by 6E505F5F555C390 link=1323926334/5#5 date=1325743560
    Mod now complete!!! Total cost, less than $1; total time taken, 30 mins. Completely reversible should I ever wish to sell/go back to doser version!!
    McGyver would be proud!
    8-)
    Great work.

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    Re: Thinking of converting K6 to doserless...

    Quote Originally Posted by 4F606A770E0 link=1323926334/6#6 date=1325752017
    Quote Originally Posted by 6E505F5F555C390 link=1323926334/5#5 date=1325743560
    Mod now complete!!!* Total cost, less than $1; total time taken, 30 mins.* Completely reversible should I ever wish to sell/go back to doser version!!
    McGyver would be proud!
    8-)
    Great work.
    Thanks heaps Andy!* Really happy with how it worked out, and hopefully it may inspire a few other home baristas to get rid of counter-productive dosers!* Ive dubbed it the "Wiffletube Conversion"* ;)

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    Member @3aan's Avatar
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    Re: Thinking of converting K6 to doserless...

    This was my idea: an cheap lampshade from Ikea found on an local flea market for 50 Cents perfect working and several followers on Dutch Forum, took an hour to make.

    Also cut down the hopper.

    The white cap at the chute is from an water purifier transportation cap upside down so the grind come to the upside down cone and falls down, perfect !












  10. #10
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    Re: Thinking of converting K6 to doserless...

    That is so cool! Good work guys.

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    Quote Originally Posted by Wiffle View Post
    Mod now complete!!!* Total cost, less than $1; total time taken, 30 mins.* Completely reversible should I ever wish to sell/go back to doser version!!

    Basically just remove the doser mechanism, cut a piece of 1" food-grade PVC tube, heat said tube in boiling water for a few minutes to soften it, stretch one end to aid in fitting over the exit chute, push tube deeply onto exit chute, sit back and admire your handywork!!* NOW I have virtually zero retention without needing to brush/pump/blow the chute out.

    Mate, I have to say this is one of the neatest ideas for turning a commercial doser grinder into on demand. I'm going to try it tomorrow on my Casadio Theo. Shameless bump to the thread, this solution should be made part of any FAQ about commercial grade grinders.

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    Agreed. This is an old post but worth bumping.

    If Wiffle is still around and see this, can you show how the end inside the grinder looks like? Also, where to get a 'food grade' PVC? Would love to do this mod (It's really zero retention? I single dose exclusively with sweeping the chute).

  13. #13
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    Most aquarium shops carry soft tubes that don't contain phthalates.

  14. #14
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    I also have the K6 but as mentioned before the exit chute is quite horizontal.
    If anyone has done this mod can you explain how you made it angle downwards?

  15. #15
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    Just some update. I did find some food safe tube as OP had in Bunnings. Tried it but it's not perfect on my K10. Retains quite a lot of coffee in the tube and I still have to sweep. It's probably because the K10 I have grinds slower and thus the grind comes out more slowly.

  16. #16
    Senior Member redzone121's Avatar
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    Not sure why I didn't come here first. Lucky for google, cheers gents !

  17. #17
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    Here is my version:





    Cunill Coffee Funnel: I bought mine around 10.

    No modification is needed, just a little work with Dremel.

    http://www.cafeparts.com/Product.asp?ItemID=10571

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