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Thread: Small Home-roasting enterprise. Some questions.

  1. #1
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    Wink Small Home-roasting enterprise. Some questions.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hey guys,

    I live in Tasmania, and absolutely love roasting and consuming coffee! I have been roasting my own beans for about 4 months now, just with an un-altered popcorn popper (1250w) and the whole journey has been amazing.

    Initially my popcorn popper was working great, with some jiggling and stirring I was managing to get even roasts and consistent 1st and 2nd crack timings, however it seems my popper is on its last legs. I have noticed recently that the beans do not actually reach 1st crack (even after 9 mins of roasting) like they should, and are quite un-even and often are burnt on one side of the bean and not on the other.

    When the popper was working well, I had plenty of time to play around with different beans and stumbled upon a great combination/blend! Naturally, I shared this with my friends family etc. and they have rather taken off! I now have plenty of people wanting my blend on a regular basis and have recently purchased 10kg of the green beans needed to create the blend, and will be purchasing more weekly.

    My main concerns at the moment are that;
    A) My old popper could only roast approx. 100g of beans per roast and size is beginning to really matter.
    B) I need a machine that can deliver a more consistent roast quality.
    C) Its really hard to find (for obvious reasons) some more definitive information on which DIY roasters are superior etc.

    I have been searching this and others forums for quite some time on alternate roasters and have really been having some trouble isolating which would best suit my particular circumstance . At the moment I don't know whether I should perhaps buy 5 poppers and mod them, buy a bread maker and mod that or just go and purchase a Behmor 1600. My reason for putting this on the forums I guess is that it would be great if I could get some advice from all the other roasters in the community on which roasters I should consider and other such resources

    Any advice would be uber-helpful and massively appreciated!

    Matt

  2. #2
    Senior Member saoye's Avatar
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    What are your prerequisites? I'd hardly think buying 5 poppers should be an option and it's not even economical. From the 5 popper mention I am guessing you are aiming for 500gm at a time? A corretto setup would easily roast that and more, and provide a reasonable amount of control on the roast depending on your setup. The Behmor is obviously made to roast coffee beans so you can't go wrong with that, max amount of beans roast at a time is 500gms.

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    Thanks for the quick reply saoye!

    500gm per roast would work well. Is there a resource of some sort I could be directed to for setting up a corretto? Also in regards to that, what price would you be looking at approximately?

    Again thanks for the help!

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    This thread has lots of good pics:
    http://coffeesnobs.com.au/home-roast...lots-pics.html
    Or just search for corretto...

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    Photo Album - Imgur

    Prices I paid on the top picture. I do about 500g per roast. 1/2hr setup/roast/packup.

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    Thanks for the links to images guys! setup looks really good and roast nice and even. I think I will definitively go for the corretto!

    If anyone knows of a really good building guide, by all means post it!

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    Senior Member saoye's Avatar
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    Quote Originally Posted by Sixthlaw View Post
    Thanks for the links to images guys! setup looks really good and roast nice and even. I think I will definitively go for the corretto!

    If anyone knows of a really good building guide, by all means post it!
    The Corretto Roaster was originated in this forum by someone with the Avatar "Corretto" hence the name. She still pops by this forum every now and again.
    The Main components are:

    1. Bread maker ($5 upwards second hand)
    2. heat Gun ($35 upwards)
    3. Some method to hold the heat gun in place over the bread maker (look around the house)
    4. A household fan to blow away the chaff ($10)
    5. A quick cooling system (can be as easy as what you currently do with your popper)

    So you could set something up as cheap as $50 or less if you already own some of the equipments.
    As a guide, my entire setup including the trolley, new heat gun and an exhaust fan bucket system was about $150. The cooling system was the most expensive of the lot costing me about $60.
    If you haven't already got one, I would add the data logger purchased here from beanbay for $79 highly recommended for repeatability of any roast profile you may have saved.

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    Thanks for the information Saoye! You have been more than helpful!

    I went searching for all the goodies I needed today, and got a KBM300 for the bread maker ($30 at salvos - checked everywhere else) and got a 2000W OZITO heat gun with adjustable temperature for $35. I am just about to go out into the shed and chuck up my contraption! Also I found a mutimeter out there, can this be used to monitor and record the temperatures?? Would be great not having to buy a logger.

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    Senior Member David8's Avatar
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    Quote Originally Posted by Sixthlaw View Post
    Thanks for the information Saoye! You have been more than helpful!

    I went searching for all the goodies I needed today, and got a KBM300 for the bread maker ($30 at salvos - checked everywhere else) and got a 2000W OZITO heat gun with adjustable temperature for $35. I am just about to go out into the shed and chuck up my contraption! Also I found a mutimeter out there, can this be used to monitor and record the temperatures?? Would be great not having to buy a logger.
    Pretty sure it can. Or does it need a specific "temp" setting. I know mine does. You will need a thermocouple though, I'd recommend the stainless one from beanbay, as the fabric (cotton??) braiding on the stock frays very easily at the heat it's exposed to.

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    I am currently running my KBM300 and the Dough cycle after 3 minutes begins stirring in 1 minutes stints - stops for 3 seconds - then starts again.. this could be problematic as some beans would be roasted more than others... Any advice?

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    I hope your right David that would be great! Ill look into getting one of those, might even check out in the shed first.

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    So I have tried all the settings out with the KBM 300 and none of them have a continuous knead function... would It be easy to re-wire the power straight to the motor? I have a friend who is an electrician, if not let me no and Ill get a return...

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    Senior Member David8's Avatar
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    Small Home-roasting enterprise. Some questions.

    Quote Originally Posted by Sixthlaw View Post
    So I have tried all the settings out with the KBM 300 and none of them have a continuous knead function... would It be easy to re-wire the power straight to the motor? I have a friend who is an electrician, if not let me no and Ill get a return...
    I'm not an electrician. But I know people have rewired the motor. So I doubt it would be too hard...

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    Senior Member saoye's Avatar
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    Quote Originally Posted by Sixthlaw View Post
    So I have tried all the settings out with the KBM 300 and none of them have a continuous knead function... would It be easy to re-wire the power straight to the motor? I have a friend who is an electrician, if not let me no and Ill get a return...
    My $5 breadmaker has a 5 minute setting that does intermittent, after the initial 5 minutes it goes on continuous. A word of warning, you may overheat the breadmaker from the heat gun if doing consecutive roasts unless you do something about the safety cut-off that might be in the breadmaker...alternatively adequate insulation in the correct areas might avoid this. I lost a batch because the breadmaker stopped halfway through a roast. I've insulated around the motor at the bottom of the bowl and it seems to have fixed that issue. Others have moved that sensor to another area.

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    Most breadmakers can be rewired to stir continuously and to remove the overheat protection. Unless you are 100% sure you can do it get your sparky mate to help you out. Safety first!

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    Senior Member sidewayss's Avatar
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    Definitely get an electrician to do the modification if you want to have it continuously mixing!

    Corettos sweet spot is anywhere from 400 gm to 700 gm. You can play with insulating the bread pan with fire blanket and making a pan cover with a hole for the heat gun, and another hole for the exhaust to vent heat and chaff, if you want improved results. Good idea since you're in Tasmania what with the cold conditions.

    Apart from Behmors, you might want to consider also the Koffee Kosmo Turbo Oven roaster, of which i am using to roast for myself and others at the same time.
    They can do big batches of around 700 gms, and i know of others who have modified them to do 1 kg at a time. It gives me great results and is my favourite.

  17. #17
    Roz
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    Re: Small Home-roasting enterprise. Some questions.

    Hi mate are u in Hobart? I can demo the I-coffee roaster for u

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    Surprised myself by roasting 950g last week on my coretto. I would normally only do 600g.
    The only downside was that it partly melted some plastic on the heatgun as I had to run the temp up a fair bit more than usual to get the same roast profile.

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    @Roz: I am in Launceston sorry

    Hey Guys,

    Quick update. I purchased a Breville bread maker, it has a continuous knead function but I don't know if the beans are being moved around enough? I am having a similar issue to the guy in this video (Corretto stirring - YouTube). Is this going to be ok? Do i need to stir? Create closer walls? Buy a new machine?

    If this is ok, where should I position the heat gun?

    Thanks you!

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    Plus I am pretty sure the rotary blade is plastic... GAH. New machine?

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    Well the bread maker is the Breville Country Bakery, which just so happens to be the very same machine that 'Corretto' used! ~ I don't know why, but I can't help but think of my bread-maker as sacred now :P
    Last edited by Sixthlaw; 24th August 2012 at 12:44 AM.

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    Hey guys,

    So here is my roast set-up!

    My first roast turned out pretty well! 1st crack happened at around 13 mins and I pulled them off at 18 (not yet second crack). I think the heat gun may have been to far away from the beans to begin with, so next time I will bring it closer to reach higher heats and get earlier 1st/2nd crack timings

    Also I got out the good-ole steel wool and went hard at that teflon! (see before and after)

    excited!
    Attached Images Attached Images
    Last edited by Sixthlaw; 24th August 2012 at 12:49 AM.

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    Also the batch size was 500 g

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    Behmor Coffee Roaster
    Hi Sixthlaw
    I'm at Longford and have a coretto setup that I'm very happy with. I normally roast between 300 and 750 gms with no problems.
    I must fully post what I've done sometime but basically it's a:-
    Sunbeam bakehouse modified to rotate whenever power is applied.
    The bread pan is covered with holes for the heat gun and exhaust
    Temperature controlled heat gun
    Thermocouple data logger
    Vacuum system and pressure cooker bean extractor/ cooler.

    I could possibly help you modify your bread-maker.
    Bring some beans out and give it a go.
    I sent a PM the other day with my phone number, or PM me back.
    Greg



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