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Thread: Importance of Hopper Shape

  1. #1
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    Importance of Hopper Shape

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi guys, my Lelit variant grinder does not feed the beans so when grinding a shot it runs for a while at high speed without grinding so the timed shots are never even.

    I suspect this is because my hopper has a very flat bottom as opposed to most that look like this one from an Isomac.

    .

    I thought there might be two solutions to this problem.
    1) Remove the finger guard on my hopper so the top of the burrs are open.
    2) Buy another hopper and hope it fits (I think the Isomac one will)

    So my questions are:
    1) Would option 1 work or would it cause other problems?
    2) Is there anybody out there who has an Isomac Granchillo grinder who could give me the outside diameter of the top of the hopper and the neck that fits into the burr set?

    I am pretty sure the Isomec has an identical grinding burr to my grinder so the hopper shown should fit, outside diameter is critical to fit in my built in Electrolux combo (and I wil probably have to cut it down to the right height somehow).


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    Re: Importance of Hopper Shape

    would option one (1) create a "popcorn" effect when grinding beans, that is they would try to jump back out.

    this would normally only happen if your only putting one or two shots of beans in the hopper each time

    i am not sure if pop corning effects the grind in a bad way, but if the grinder has a "timer" it would

    if you can just lift out the finger guard i would try it.

    i dont use any hopper in my super jolly 98% of the time. i drop my blind filter in the hole to act as the "lid" 2 doubles of beans fit just nice in the throat of the grinder:)

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    Re: Importance of Hopper Shape

    Quote Originally Posted by 3E323B36363F530 link=1282124525/1#1 date=1282125634
    would option one (1) create a "popcorn" effect when grinding beans, that is they would try to jump back out.
    Yes I thought there would be issues like that. I dont think the guard can just be pulled of to try this so I was not going to rush in with the Dremell!

  4. #4
    CoffeeSnobs Owner Andy's Avatar
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    Re: Importance of Hopper Shape

    Can you rough-up a paper cone/funnel "hopper insert" to test the effect of a sharper fall angle before you hack into the existing hopper?


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    Re: Importance of Hopper Shape

    Quote Originally Posted by 59767C61180 link=1282124525/3#3 date=1282139523
    Can you rough-up a paper cone/funnel "hopper insert" to test the effect of a sharper fall angle before you hack into the existing hopper?
    Good idea Andy. I dont think itll work. The guard is quite large and there is only a 25mm or so gap between the guard and the hopper so I doubt there is room for a funnel. But as I write this, I wonder if putting a cone on top of the guard to force the beans to the outside so they fall down under the guard? Some hoppers seem to folllow this design.

  6. #6
    A_M
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    Re: Importance of Hopper Shape

    Do you need a hopper this size or can you consider a true after market type...

    Thus;

    A: You keep teh original - Resale issues

    B: You have somthing that suits your specific needs


    PS. Make sure you get a magnet or two in there to catch teh ferrous type material.. Some of those great beans from strange places have lots of non coffee bean variables tossed in; for good measure ;)

  7. #7
    Coffee+carbon=heaven Mono's Avatar
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    Re: Importance of Hopper Shape

    I did this and have no issues with beans being caught in it. It is a Star Wars plastic cup[from HJs] that I have cut down to suit and I have then fashioned a timber plug. It only holds enough beans for 3/4 double shots. The only time the original Macap hopper comes out is if we are hosting a party or such.

    Steve.




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    A_M
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    Re: Importance of Hopper Shape

    Neat 8-)

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    Re: Importance of Hopper Shape

    Awesome work Steve. Obviously your inlet into the grinder is a lot bigger than mine :(

    I had to get a few bits and pieces so I decided to buy the Isomac hopper from one of the sponsors while I was at it and will end up doing something similar. Hopefully, the hopper neck will fit in my grinder. If not, I will work out some way to make it fit.

  10. #10
    Senior Member GregWormald's Avatar
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    Re: Importance of Hopper Shape

    I have a very similar set-up to Steves (but without the beautiful timber lid).
    I used a small, cut down stainless steel cocktail shaker from one of the "cheap shops". I think it was about $5.

    Greg

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    Coffee+carbon=heaven Mono's Avatar
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    Re: Importance of Hopper Shape

    Thanks Guys, yes it works a treat and holds about enough beans for a days supply.

    Steve :)

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    A_M
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 674544452A0 link=1282124525/10#10 date=1282258424
    Thanks Guys, yes it works a treat and holds about enough beans for a days supply.

    Steve :)
    Show us your pics

    My Lid of a cocktail shaker holds about enough for one or two shots..

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    Coffee+carbon=heaven Mono's Avatar
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 507F7674635C707F7076747C747F65110 link=1282124525/11#11 date=1282261530
    Show us your pics
    Sorry AM, but pics of what :-/ I was previously using a soft plastic disposable drinking cup [as hopper] with a timber disc [as lid] cut with a hole saw. It worked fine but looked like a hack. Thats when I made this one. I can post images of the old set up if wanted.

    Steve

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    A_M
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 496B6A6B040 link=1282124525/12#12 date=1282265849
    Quote Originally Posted by 507F7674635C707F7076747C747F65110 link=1282124525/11#11 date=1282261530
    Show us your pics
    Sorry AM, but pics of what :-/ I was previously using a soft plastic disposable drinking cup [as hopper] with a timber disc [as lid] cut with a hole saw. It worked fine but looked like a hack. Thats when I made this one. I can post images of the old set up if wanted.

    Steve
    Opps... Was looking but did not see ;)

    Thought you reply was from " RodW "

    My humble apologies.. Pic of old paper cup not required :D

  15. #15
    Coffee+carbon=heaven Mono's Avatar
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 406F6664734C606F6066646C646F75010 link=1282124525/13#13 date=1282268811
    Opps... Was looking but did not seeWink

    Thought you reply was from " RodW "

    My humble apologies.. Pic of old paper cup not requiredCheesy
    :-[bugger ;D ;) :)
    I think its a bloke thing, looking but not seeing 8-)

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    Re: Importance of Hopper Shape

    Thats all right guys, I thought you both had too much coffee!

    Seriously though, thanks for the ideas. Wish I had of thought of the cocktail shaker but the hopper I ordered was only $22 or so I ordered a finger guard for it as well for another $7. Im sure AM said he was going to come over and cut it down for me on my lathe! *;)

    I would not mind seeing cocktail shaker pics though.

  17. #17
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 624D4446516E424D4244464E464D57230 link=1282124525/13#13 date=1282268811
    Pic of old paper cup not requiredCheesy
    actually old clear plastic cup :) ;)

  18. #18
    A_M
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 69747F6C1B0 link=1282124525/15#15 date=1282273031
    I would not mind seeing cocktail shaker pics though.
    Lid of shaker :

    http://coffeesnobs.com.au/YaBB.pl?num=1277550178/24#24

    or a plastic spray bottle..

    http://coffeesnobs.com.au/YaBB.pl?num=1171623577/80#80

    Lots of ways to skin a cat...


  19. #19
    Senior Member GregWormald's Avatar
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    Re: Importance of Hopper Shape

    Cocktail shaker with bottom cut out.
    Greg



  20. #20
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    Re: Importance of Hopper Shape

    Greg, thats pretty cool too 8-). Certainly no light degradation of the beans with the stainless hopper.

    Steve

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    Re: Importance of Hopper Shape

    Wel not as neat as some yet. Remembering my machine is a built in one which will eventually go in our kitchen reno. Internally it is a Lelit Combi.



    And the grinder hopper is hidden when it is closed.



    I got my hopper today which was smaller than I expected which is good as it easilly fits though the hole in the top of my machine. Here it is beside the original hopper. Too tall to fit in and close the machine up.



    And shown here after some surgery.



    It is pretty brittle stuff and hard to cut without breaking stuff (which did happen). I was hoping to be able to trim it up on my lathe (mainly to show off to AM) :) ) but this did not work so resorted to the Dremel. I have since found a nice plastic lid I modified to sit on top of this so it looks neat when put together.

    Anyway, the bad news is that the flow out of the grinder is no better or more even than the flat bottomed original hopper so tomorrows job is to try it without the finger guard.

  22. #22
    Sleep is overrated Thundergod's Avatar
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    Re: Importance of Hopper Shape

    Get some sandpaper and smooth out those jagged edges by placing the sandpaper on a flat surface and rubbing the upside-down hopper on it (in a circular motion).

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    Re: Importance of Hopper Shape

    Quote Originally Posted by 6854495258594E5B53583C0 link=1282124525/21#21 date=1282656631
    Get some sandpaper and smooth out those jagged edges by placing the sandpaper on a flat surface and rubbing the upside-down hopper on it (in a circular motion).

    Yeh, will clean it up if it becomes a permanent fixture on my machine but I had to make a coffee with it as soon as I could!

  24. #24
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    Re: Importance of Hopper Shape

    Quote Originally Posted by 322F2437400 link=1282124525/22#22 date=1282657027
    but I had to make a coffee with it as soon as I could! *
    :) :) :) priorities in order ;)



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