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Thread: "Corretto" - The Beginning

  1. #151
    Senior Member GregJW's Avatar
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    Re: Easy Hands Free Heat Gun Setup

    Thought Id post my Corretto set-up to date.

    Breville BB250 ($26 2nd hand) - no adjustment required
    Taurus 2speed Heat Gun ($20 Aldi)
    plus fan, Digitech multi-meter (thanks Andy), timer, 2 colanders, vacuum bucket AND

    heat gun holder - old bedside lamp arm with velcro strap, attached to timber base. Very easily adjustable up and down /sideways / round and round, etc by metal arm (does not heat up) plus timber arm slides up and down.

    Gotta thank my father-in-law - after discussing my requirements and getting advice from his wife, he was the mechanical know-how behind this one.

    Greg.



  2. #152
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    Re: Easy Hands Free Heat Gun Setup

    Greg, looks pretty nifty. Ive been thinking of converting over from a popper and have been looking at all the various setups. I think your flexible arm looks great. Ive got an old one at home and might just go that way myself. Thanks for the idea.

  3. #153
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    Re: Easy Hands Free Heat Gun Setup

    Quote Originally Posted by Javaphile link=1154442377/135#149 date=1201022890
    Quote Originally Posted by craig link=1154442377/135#148 date=1201005208
    Quote Originally Posted by Evan link=1154442377/135#147 date=1197627055
    Heres my simple yet compact method (as posted in the "corretto construction" thread).
    *
    Any tips on where I may find this corretto construction thread.?

    I have had a look but cant seem to find it.

    I would really like the corretto construction for dummies version if this is available! ;D
    http://coffeesnobs.com.au/YaBB.pl?num=1154442377


    Java " :)" phile

    Java, thats a link to this very thread! I thought that there may have been another thread that I hadnt been able to find.

  4. #154
    Mal Dimal's Avatar
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    Re: Easy Hands Free Heat Gun Setup

    Quote Originally Posted by craig link=1154442377/150#152 date=1201076374
    ava, thats a link to this very thread! I thought that there may have been another thread that I hadnt been able to find.
    I had a laugh ;D....

    Theres a reason for that craig, this is where it all started 8-)

    Mal.

  5. #155
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    Teflon

    I was wondering how many breadmakers have teflon lined bins or paddles. Teflon emits illness causing fumes at high temperatures starting from about 290degC.

    Does anyone think this could become a problem for some corretto projects?

  6. #156
    Sleep is overrated Thundergod's Avatar
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    Re: Easy Hands Free Heat Gun Setup

    My roasts dont go over 235 degrees.
    I havent measured the temp of the container though.
    Another 55 degrees seems a looong way off.

  7. #157
    Senior Member ozscott's Avatar
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    Re: "Corretto" - The Beginning

    I have been using the Makita HG for about a year at a guess after burning out the Ryboi - wanst the fault of the Ryobi because I never used to have a fan blowing chaff away from the HG air intake. The Makita though is a step up I reckon and does not tip the beans even when almost touching them whereas the R did.

    I LOVE CORRETTO ROASTING! ;D

  8. #158
    Mal Dimal's Avatar
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    Re: "Corretto" - The Beginning

    Quote Originally Posted by 76636A7A766D6D190 link=1154442377/156#156 date=1238013459
    I have been using the Makita HG for about a year at a guess after burning out the Ryboi - wanst the fault of the Ryobi because I never used to have a fan blowing chaff away from the HG air intake. *The Makita though is a step up I reckon and does not tip the beans even when almost touching them whereas the R did.

    I LOVE CORRETTO ROASTING! ;D
    I think the design of the Breville Big Loaf probably helps to reduce roast artifacts too Oz. I know when I was using a modified popper prior to the Corretto, if I didnt keep a really close eye on the fluid bed agitation and the bean mass temperature, I could end up with half a batch of tipped beans, or even worse.... a large proportion of the batch not roasted evenly all the way through the beans.

    I love my Corretto roaster too... Mountains of kudos to you Belinda [smiley=thumbsup.gif]

    Mal.

  9. #159
    Senior Member sidewayss's Avatar
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    Re: "Corretto" - The Beginning

    I,m ready to make the transition from popper to corretto now. I,ve just done a dry run of the dough setting of my Breville breadmaker and found it stops at the 20 minute mark. After the initial first few min of mixing, i am left with only 15 minutes kneading time. Does anyone know the way to go about hardwiring the thing to run til i pull the plug? I,m a bit slow(meaning duh ::)) when it comes to electricals n wiring etc. so a pictorial or, a dummy,s guide list of steps to do would be much appreciated. A solution to this would benefit anyone seeking to hack their breadmaker. Also trying to figure out what stand is cheapest and best to hold the heat gun. Ta :)

  10. #160
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    Re: "Corretto" - The Beginning

    Quote Originally Posted by 766C616072647C7676050 link=1154442377/158#158 date=1280676255
    I,m ready to make the transition from popper to corretto now. I,ve just done a dry run of the dough setting of my Breville breadmaker and found it stops at the 20 minute mark. After the initial first few min of mixing, i am left with only 15 minutes kneading time. Does anyone know the way to go about hardwiring the thing to run til i pull the plug? I,m a bit slow(meaning duh ::)) when it comes to electricals n wiring etc. so a pictorial or, a dummy,s guide list of steps to do would be much appreciated. A solution to this would benefit anyone seeking to hack their breadmaker. Also trying to figure out what stand is cheapest and best to hold the heat gun. Ta :)
    Gary, as you said your a bit "duh" with lectrickery, get a sparky to have a look as every BM is a little different.

    it is normally very simple and you should get a small switch for the side of the BM so you can turn it on and off easy. You could use a house light switch from bunnings etc.

    i suggest removing all the old BM control panels inside and just having the wiring going to the motor via the switch. The sparky can ensure it is correctly earthed and wired properly

    WA is full of tradesmen, offer them some beer and have them do it....

  11. #161
    Sleep is overrated Thundergod's Avatar
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    Re: "Corretto" - The Beginning

    Agreed.
    I had an incident when wiring mine.
    Id already checked it to make sure everything was right and cant remember now why, but I didnt get around to soldering until a few days later.
    By then Id obviously forgotten the correct order and something went BANG.

    Find a qualified electrician to wire it directly as stated above.

    Alternatively, have you checked all the settings on the BM to see if theres a cycle that doesnt have the delay?
    Which BM model do you have?



  12. #162
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    Re: "Corretto" - The Beginning

    Wiring the bread machine up is pretty straight forward once you remove all the guts.

    Wiring info here.

    My build thread.

    My roaster...


    Thanks, Corretto! :)




  13. #163
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    Re: "Corretto" - The Beginning

    Popped on here a while ago and got some great ideas and also some advice on how to set up a corretto.

    As I am totally not a skilled labourer by any means, I figured Id post a few pics to encourage those of you who are trying to determine if you have the ability to set one up.

    Im sure you can be as elaborate as heck, but heres my system with no drilling, screwing, hammering, glueing, etc. Closest I got to handiwork was using cable-ties on the heat gun...

    Russell Hobbs - Breadmaker Jnr
    Skil - Skilgun 1800 watt
    Beans - Costa Rica SHB (No idea what that means!)






    Green beans are a little difficult to get hold of as the roasters locally all seem to fear competition, but when they saw I only wanted 1kg, they were willing enough.





    I found these two sifting plates at a thrift store for AUS1 each. The holes are marginally large for the average bean, so I tended to have 1% or so fall through, but no big deal...



    Roasting was 7.5 mins to first crack and 1.5 mins further to the second crack. The fan was off most of the time as it was unnecessary, and blew too hard when I tried it.

    I was roasting at full heat for the entire process, and the BM was on the dough setting which pulsed at first and then oscillated smoothly after a minute or maybe two.

    I only took a vid of the beans, which were dark and looked superb, but I dont think I can post an AVI file here, so heres the result:




    This was my first attempt, obviously and I was personally very, very pleased. My mate, who knows more about coffee than I do, liked them - though his wife is less partisan and declared they tasted like licking an ashtray...

    Damn the critics...! ;) ;)


  14. #164
    Mal Dimal's Avatar
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    Re: "Corretto" - The Beginning

    Love your Heatgun Stand Willy.... ;D

    Thats what I call determination.

    The brew in the cup looks yummy to me too mate and I agree, some people dont know what theyre missing out on... ::)

    If you want to attach a Video, try uploading it to YouTube and then adding the link to your next post via this button above, in the Toolbar...

    Happy roasting Willy... 8-)

    Mal.

  15. #165
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    Re: "Corretto" - The Beginning

    Woo, Ive finally gone the corretto path after having my popper for 6 months or so, made some nice roasts, but the difference is pretty huge between the two!

    Got a Bosch heat gun, with the LCD readout, and a second hand Sunbeam Cooltouch bakehouse. For the cover I got a giant sheet of asbestos free fibre cement for cheap, so if I bust it, Ive got heaps of spares!

    BM does 3 minutes intermittent, then 20 minutes full speed spinning, which seems to work well. Heat gun on 350 until first crack, then 300 until second crack, with some Peru Ceja de Selva (House of the Jungle!), gives me:

    first crack start: 14:33
    first crack end: 16:04
    second crack start: 19:06
    end roast : 19:08

    is that a bit long? Tastes really nice after ~7 days as a shot out of my Cafe Roma.


    Images attached. I tried embedding to my googleplus album, but the forum complained that I was using ALL CAPs and wouldnt let me post with the image URLs in.








  16. #166
    Sleep is overrated Thundergod's Avatar
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    Re: "Corretto" - The Beginning

    Quote Originally Posted by 715650434C4547635656504341564D50220 link=1154442377/164#164 date=1326157554
    is that a bit long?
    No.

    A lot of the profiles you see here should be taken as a guide.

    As far as Im concerned youre in the ballpark.

    Now you can play around with the times and see if you can make it taste any better.

  17. #167
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    Re: "Corretto" - The Beginning

    Excellent, thanks Thundergod, I thought I was probably about right :)

    Will certainly experiment and see what I can do. May latest roast I pulled out at ~16 minutes, so a bit before 2nd crack, quite a rich brown, almost no black, tasting pretty good in my aeropress at work!

  18. #168
    Senior Member NakiChap's Avatar
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    Re: "Corretto" - The Beginning

    Hello all

    First attempt at roasting* ,put together a corretto type set up roasted 250g of Colombian volcan galeras from my starter pack which I received today,
    2nd crack got away on me but fun first roast* :)

    Pics Below


  19. #169
    Senior Member NakiChap's Avatar
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    Re: "Corretto" - The Beginning

    My set up ;) the roast is alot darker than the above photo shows.


  20. #170
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    Hello, I am a newbie roaster. Ive been roasting coffee on a wok so far and it does not give good results no matter how I do. I have a very tight budget and roaster like behmor is way out of budget and have been looking for 2nd hand air popper but have no luck (found cuisineart 1500watt popcorn popper on ebay) but thought it is too powerful. So I've been looking at this method of roasting (bread maker) in the past few days and decided to try.

    I need a guidance please on set up and choosing what kind of bm and heat gun I can use and how and where do I attach that multi meter?

    I found breville bbm270 on ebay for $30 is this suitable? It has dough setting.

    Thanks in advance

    Edit: Just a thought, is it possible to cool down coffee beans using hair dryer (no heat just air in high setting) I think using a fan is a bit awkward and space consuming.

  21. #171
    Life-long Learner DesigningByCoffee's Avatar
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    Quote Originally Posted by ahhhespressso View Post
    Hello, I am a newbie roaster. Ive been roasting coffee on a wok so far and it does not give good results no matter how I do. I have a very tight budget and roaster like behmor is way out of budget and have been looking for 2nd hand air popper but have no luck (found cuisineart 1500watt popcorn popper on ebay) but thought it is too powerful. So I've been looking at this method of roasting (bread maker) in the past few days and decided to try.

    I need a guidance please on set up and choosing what kind of bm and heat gun I can use and how and where do I attach that multi meter?

    I found breville bbm270 on ebay for $30 is this suitable? It has dough setting.

    Thanks in advance

    Edit: Just a thought, is it possible to cool down coffee beans using hair dryer (no heat just air in high setting) I think using a fan is a bit awkward and space consuming.
    Welcome to the roasting world!
    The BBM machines are great - standard 30 minute dough cycle makes it a great place to start without mods, and a good solid design.

    With heatguns, many use the Ozito adjustable guns which are nice and cheap (around $40 from memory?). But if you think you might keep going with the roasting - then going to something like the Bosch 630 ($100) is a really good idea - very, very, very accurate and temp adjustable in 10° increments. Very easy to get consistency and tweak roast profiles.

    I don't think your haridryer would last too long for bean cooling duties. My cooler is a $20 bathroom fan from bunnings in a bucket, with a $2 mesh food cover. But if the budget is really tight, just use a collander and a pedestal fan blowing over the top

    Happy searching!
    Matt

  22. #172
    Senior Member Yelta's Avatar
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    Quote Originally Posted by DesigningByCoffee View Post
    . But if you think you might keep going with the roasting - then going to something like the Bosch 630 ($100) is a really good idea - very, very, very accurate and temp adjustable in 10° increments. Very easy to get consistency and tweak roast profiles.
    Matt
    The Bosch 630 is a very accurate, reliable and flexible unit, been using one for years, highly recommended.

  23. #173
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    On the teflon issue I was wondering if one of the cheap cake mixers with a dough hook would work? The bowl and dough hook are stainless steel, but the base of the mixer that grips the bowl is plastic. I thought you could dismantle the mixer - remove the base at the hinge, then mount the bowl in something inflammable (or meltable) somehow. Gets you variable speed mixing too.

    1000W Kitchen Stand Mixer | Best value 1000W Stand Mixer in Australia

  24. #174
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    Is the any chance that my green beans were too old to crack?

    I opened them over a year ago but vacuum-sealed them abd thought they would be fine, but today I left the breadmaker on dough for 30 mins plus and despite the machine overheating and cutting out twice, I never got a crack out of the beans.

    Eventually I tossed caution to the monsoon and turned the HG to high, achieving a crack in a few short moments, but soundly burning the beans before I could extricate them from the bowl.

    I've used the same beans and equipment before with great results, so I believe the beans were too old... :-(

    Any thoughts?

  25. #175
    sjh
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    newbie corretto roast

    Well i have done six roasts with my corretto setup with good results thank's to information found on this site I used designing coffees spread sheet as a guide to roasting!! Many thank's Took the difficulty out of the roasting process.
    Roasts have been. 300grams Sumatran Mandheling Jade Colombian Volcan Galeras Supremo
    Also have Venezuela San Cristobal Lavado To roast.
    Mexico el Triunfo Arabigo
    Peru Ceja de Selva AAA
    Brazil Yellow Bourbon Especial

    Yes the bug has Bitten another tragic joins the ranks.
    Regards, Steve.
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  26. #176
    Life-long Learner DesigningByCoffee's Avatar
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    Excellent … another tragic is born! … next - take over the world!

    Welcome Steve
    Cheers Matt

  27. #177
    Mal Dimal's Avatar
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    Haha....

    Welcome Steve. Yeah, it's a great hobby alright, and you get to drink the results at the end...
    Maybe even better than beer brewing (ducks below the bench)...

    Mal.

  28. #178
    sjh
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    Thank's For the welcome it's great fun learning to roast though world domination my take some time,have not tried to brew beer but have worked in viticulture for some time and have tried my hand at making wine from left over grapes not picked by harvesters,not quite as technical as roasting coffee though.

    Regards, Steve.

  29. #179
    Life-long Learner DesigningByCoffee's Avatar
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    Been slowly refining my corretto design in theory - and now is taking shape in practice! A week back in the school workshops also gave me a little time with a welder and folder to do a few bits I couldn't do at home
    A much more streamlined design than current. I've built two sets of components (building one for my brother and one for myself when my setup requires replacing - which is now about 4 years old).
    Lid, paddle extension and splitter, all designed to suit larger batch sizes. Had an exhaust fitter just tweak some exhaust tube to friction fit a Bosch gun to perfection - so can just easily take in and out for easy removal.
    In theory, with the design the pan could be strapped in full-time, and the whole roaster setup on a pivot to tip straight into the cooler. Or the pan can be lifted out using the entry chimney (and a welding glove!).
    Just need to insulate and fit probe, and we're done!

    Coupla pics…

    Cheers Matt

    DBC-Corretto-Components-1-Jun15.jpg DBC-Corretto-Lid-1-Jun15.jpg DBC-Corretto-Interior-1-Jun15.jpg
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  30. #180
    Mal Dimal's Avatar
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    Very "schmick" Matt...

    Mal.
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  31. #181
    Senior Member artman's Avatar
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    Very nice. Can you post a pic of the inside showing the splitters and paddles, curious to see how it is setup.

    What batch size do you run on this?

    Cheers

  32. #182
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Artman
    The splitter is the perf panel, which just cuts off the corner below the gun port, giving a little gap for around 1/2 the airflow to get down into the bean mass. The paddle extender is just pop riveted to the paddle to give a little extra height. Hopefully you can see that a little in the last pic.
    I'm usually running 750g batches with this setup, and it handles it pretty easily

  33. #183
    Senior Member artman's Avatar
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    I think I know what you mean. So the heat gun air doesn't directly hit the bean mass?

    I have a double paddle BM and do a quarter of a CS bag of green, 625g which ends up as ~500g roasted.

    Cheers

  34. #184
    Life-long Learner DesigningByCoffee's Avatar
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    Some of the airflow goes straight onto the top of the bean mass, but half is directed down and out into the lower part of the bean mass via the holes. It also acts to produce more 'radiant' heat, as the splitter itself would warm up being directly in the airflow. I'm not sure on amounts, but I could certainly taste the difference when I installed my first variation

    Here are a pic of Mk1 and looking into the current chimney, and the finished project …

    Cheers Matt

    DBC-splitter-paddle-extension.jpg DBC-Coretto-Entry-Port-Jun15IMG_0011.jpg DBC-Corretto-Complete-Jun15.jpg
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  35. #185
    Senior Member artman's Avatar
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    Behmor Coffee Roaster
    Ahhh that makes sense now. Interesting that the difference is noticeable, well done.

    Cheers

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