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Thread: Corretto advice

  1. #1
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    Corretto advice

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hello,

    I recently bought a Tefal Breadmaker (OW3001). The baking pan has a tefal coating. Would it be safe to roast my beans in it? If not, could I lay aluminium foil in it? Also, would I need a temperature data logger to get good consistent roasts?

    Cheers,
    Brad

  2. #2
    Senior Member coffeechris's Avatar
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    Hi Brad,

    You will find the bread maker fine to roast with. I have used mine for and many others without a problem. The only issue i has was sometimes smaller beans would get caught under the paddle while adgitating causing the beans to wear away the coating. As for a data logger i with many others here would highly recommend it if you intend on properly logging roasts. Andy's one from Beanbay is the best bet.

    Kind regards,

    Chris
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    Hi Chris,

    Thanks for your advice. Are you certain that Tefal/Teflon coatings are safe with heat guns? I'll have a look at getting a data logger soon.

    Thanks again,
    Brad

  4. #4
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Brad
    The coatings should be OK - when roasting you only head towards 230 max in the pan (despite the gun power specs) which I imagine any coating would be rated for when used for baking bread. But eventually the coating does wear away from all the abrasion of the beans (which it does with bread dough too for that matter!), but at least in coffee I imagine and particles would stay in the used puck anyway than in your loaf!
    I wouldn't lose any sleep - just get corretto'ing!

    And the Data-logger is pretty essential IMHO - esp if you want consistent results once you've figured it all out ;-)

    Matt
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    Hi Matt,

    Thanks for your re-assurance. Do you know if all the new bread makers have a temperature sensor and if they'd need to be removed?

    Thanks!
    Brad

  6. #6
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Brad
    Many of them do. From memory, mine was just some white cloth wrapped wires that came and screwed to the main metal casing. I just undid the sensor bit from the metal casing, electrical taped it all just to be sure and tucked it all back into the main plastic casing, then insulated the pan with fire blanket which keeps the temp down too outside the pan.

    I ended up going the full rewire route too - so certainly no problem now!

    But actually, if you insulate and lid the pan, you also tend to need less heat input as well which can help…
    I'd just have a try on your dough setting and see what happens.

    Just be really careful - all 240v in there!
    Matt
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    Hi Matt,

    I'll be sure to buy a fire blanket and tape up the temp sensor. I'm not sure about the lid yet, I don't have the tools to fabricate a steel lid so I might cut a hole in the middle and fit the heat gun into it.

    Thanks

  8. #8
    Senior Member sidewayss's Avatar
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    Hey Brad,

    Enjoy your coretto journey.

    Insulate the pan with two wraps of the fire blanket and secure with wire.

    When you're starting out on the coretto, I would recommend you remove the lid just so you can see and smell the roasting process.

    After a number of succesfull roasts and your confidence grows, you may knock out the glass of the lid to accommodate the heat gun and install it back onto the breadmaker. Just make sure there is a vent for chaff and smoke to escape.

    I,ve had success using tiles, playdough moulded, fired and set in the oven, and my current set up which is fibro-board which easily obtainable at hardware stores. Wine cork screwed into the middle of the board as a handle, holesawed two holes. One for the heat gun, the other for venting.

  9. #9
    Life-long Learner DesigningByCoffee's Avatar
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    Second what Gary has said - all sorts of options!
    Even alfoil can work well as a temporary lid. Mine is made from an old cake tin base with a few layers of fibro on top. Fibro is great - don't even need any power tools - you can score and snap your basic shapes with the edge of a flat screwdriver, and cut holes or curves with a small flat screwdriver & hammer - just nip away at it ;-)

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    Just echoing or reinforcing previous comments.

    I used a pizza tray for ages as a partial cover, poor insulation properties.
    A few months ago I found a decent tile, glazed one side, i guess its about 7mm thick and its big enough to cover the entire opening but leaving enough room for the heat gun nozzle to point down into one corner = the corner where the bean mass will be turning / taking the heat away underneath the covered part and then ends up exhausting opposite the HG nozzle. Advantage of a tile like this, if you need to let a bit of heat out at any stage its really easy just to pull back the tile slightly, i am talking one centimetre increments to make minor adjustments to temp rise. If you find the roast is about to stall and you want to keep more heat in briefly, you can angle the tile so it covers almost all of pan except for HG nozzle.

    The majority of my chaff ends up inside the bread maker chamber, in-between the pan and rest of machine and is easy to suck out with vacuum.

    I have only just insulated with the fire blanket after about a year without. 3 roasts in and I am loving it, so much more stable and easier to manage. Less heat needed at the crucial latter parts of the roast and its HEAPS quiter. I Will be tasting the results in a few more days, but going by the smell of the beans....i can tell already its going to be an improvement.

    If you can grab the data logger from beanbay, download the CS software and hook it up to a computer,it makes getting great repeatable results a lot easier.
    I went for around a year just roasting by sight and sound, the ability to monitor the temps so closely is priceless and has big impacts on the end results in the cup and you can really experiment and fine tune your roasts to your brewing equipment giving you what you desire in the cup.

    Enjoy the journey into making your own roaster, its very very addictive and with so many great beans to try in beanbay you will never be short of something new to subject your taste buds to.

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    Thanks everyone for your excellent advice. My beans arrived this morning so I'll grab a fire blanket after work. I still have to find something cheap with a base so I can mount the heat gun to it. I had a look around bunnings the other day and found nothing. I might have to use a pedestal fan for now.

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    Also, what's the minimum amount of beans I'll need to have in the BM to get a good roast? I'd like to keep it as low as possible as I don't like to drink stale coffee.

    Cheers

  13. #13
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Brad
    That's exciting! It'll be great to get going.
    I've found that 350g of greens is an good size - when roasted you can just squeeze them into a 250g coffee pouch, and that does us a week. Too much less, it gets unpredictable to log or control.
    Are you using an adjustable gun or fixed temp? If it is adjustable, just make up some sort of cradle/support out of coathangers. If it is fixed, you might need to use something adjustable - like a camera tripod/worklight stand etc

    Happy roasting!

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    Quote Originally Posted by BradG View Post
    Also, what's the minimum amount of beans I'll need to have in the BM to get a good roast? I'd like to keep it as low as possible as I don't like to drink stale coffee.
    Cheers
    I usually roast 300g batches of green for ~250g of browns, stored in ziplock one-way valved bags (available from beanbay) they're considered by many (most?) here to be the best way to store coffee.

    As for the heatgun, I have mine mounted on a cheap and (very) nasty chinese camera tripod ($20 shipped from evilBay).

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    Hi Matt,

    I'm using a $35 Ozito heat gun from bunnings. I'll see if I can mount the heat gun with a few coat hangers. I think I might try 300g of green beans and see if that'll do the trick. How high would the tip of the heat gun need to be from the bottom of the tray for 300 grams of green beans? Should I leave the gun at 30 degrees for the whole roast or adjust it before and after first crack?

    Cheers

  16. #16
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Brad
    Really depends. I don't know the Ozito well - but my gun tip is level with the top of the pan with a lid - don't want to scorch the beans. I'd set it up with the gun pointing down in one corner, venting the other. I normally start slow to settle & pre-warm the beans, then slowly ramp my gun temp up to first crack (for that amount of beans not ever ending up much above 2/3 gun power) - then back off a little just before first crack and then agin at the end of rolling first crack - but this point might be hard to judge long term without a multimeter.

    But search on 'Ozito' might give you some good starting point settings/processes from other CSers?
    Matt

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    I use probably the same Ozito gun, I generally start with the tip sitting just below the rim of the bucket in the BM, then I adjust as needed to meet my target profile.

    I can usually manage using the temperature adjustment on the back of the gun but sometimes it's necessary to alter the height of the gun (by way of adjusting my tripod), I start it at about midscale and fan speed 2.

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    Hi guys,

    I roasted my first batch of beans tonight in my Corretto. First crack was at roughly 16 minutes and I decided to turn the heat gun off before second crack. I was using a fan at the start of the roast but turned it off as it was cooling the roast down too much. The consistency of the roast was fairly good, only a few beans were a bit lighter in colour than the rest. My heatgun was at 350 degrees until first crack and then down to 300 degrees as suggested by another user. I used roughly 250g of peru ceja de silvia. I'll mount the heatgun to the lid next time to keep more of the heat in and hopefully end up with a better roast. Overall I'm really happy with my result and would like to thank everyone for their excellent advice.

  19. #19
    Life-long Learner DesigningByCoffee's Avatar
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    Great work Brad
    Make sure you keep notes (bean type, weight, time & gun settings etc) and also your tasting notes. You want to know what you did to get that 'great' result - so hopefully you can do it again!
    Look forward to your tasting notes… :-)
    Matt

  20. #20
    Senior Member sidewayss's Avatar
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    Roast a bit faster next time and compare.

    Say try for 12-13 minutes for first crack then a few minutes later for second crack, especially for your small batch.

    Small batches has more unevenly roasted beans compared to medium 500-600 batches.

    The baby roaster which is the one on my profile pic roasts 200 gm for 9 minutes 1st C, n 12-13 minutes for start of 2nd C, just for comparision.

  21. #21
    Senior Member sidewayss's Avatar
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    If you want a lighter roast with less roast characters, stop halfway to 3/4 towards 2nd C.

  22. #22
    Sleep is overrated Thundergod's Avatar
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    I never used a lid.

  23. #23
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    Behmor Coffee Roaster
    I thought some may find this interesting...
    Corretto roast in timelapse !
    Timelapse of Roasting Coffee with Heat Gun & Breadmaker - YouTube
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