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Thread: Tips for breville big loaf corretto

  1. #1
    Senior Member magnafunk's Avatar
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    Tips for breville big loaf corretto

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I just picked up a breville big loaf bb380 which I understand a few folks around here are using. Before I dive into it I was hoping anyone with a bit of experience with this can give me some pointers as to ideal roast size and maybe some ballpark temperature profiles to run with my Bosch heatgun.

    I'm currently using a Tiffany bread maker with around 600g roasts, which sometimes gives me a bit of tipping so I'm probably stretching the limits of what it can handle, hoping the big loaf will allow bigger roasts.
    Thanks

  2. #2
    Mal Dimal's Avatar
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    G'day mate....

    If you head into "Roasting Tips and Tricks" and check out some of my roast batches, that may give you something to get started on...
    Start from the end and work back....

    With regard to settings for the Bosch HG, Matt (DesigningByCoffee) has some great info on that but with a different BM. Should be good as a guide though.

    How have you got your Corretto set up? Is it insulated, with or without an insulating lid,etc...

    Mal
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  3. #3
    Senior Member magnafunk's Avatar
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    Thanks Mal, I've actually pretty much based all my roasts on DBCs preheat, heat, dip, heat, button off profile. Ever since I started using that I've not had a bad roast. Just wondering how much extra heat I'll need for say a 50% bigger roast.

    By the way, I really enjoy reading your posts Mal, always informative and helpful and your emails getting me up and running with the bfc saved me a lot of messing around.

    Cheers ☕

    Edit: Forgot to say, I'm currently running uninsulated with a roof tile lid but am planning to pick up a fire blanket now that I'll be increasing roast size.

  4. #4
    Mal Dimal's Avatar
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    Quote Originally Posted by magnafunk View Post
    Forgot to say, I'm currently running uninsulated with a roof tile lid but am planning to pick up a fire blanket now that I'll be increasing roast size.
    Insulating the bread pan makes quite a bit of difference and I'd be surprised if after doing that, you found that you used more than the same level of input, and maybe even a bit less...

    I don't have a Bosch HG, rather just a Makita with a rotary dial control. Output power is 2000W when flat out...
    Anyway, the highest I ever need to use, is about 1300W as I approach 1st-Crack so still have plenty in reserve if I ever need to go to 1.0Kg+ roast batches. You should notice a similar level of input with your Bosch I would say...

    Always fun when trying new things...

    Mal.

  5. #5
    Senior Member artman's Avatar
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    I have a rectangular pan, twin paddle BM (can't recall model) and run it with a metal lid and no insulation. i do 625grams green, quarter of a cs bag, which gives about 500g roasted.

    I only have a basic hear gun but run it less than full to 1st crack then back off further until 2nd crack.

    Cheers
    Last edited by artman; 22nd February 2016 at 07:20 PM. Reason: typo

  6. #6
    Senior Member magnafunk's Avatar
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    Well o had planned to wait until I'd bought a fire blanket before doing my first run but I couldn't help myself. First up was 750g of png Mt ambra, I simply added 50 degrees to my normal profile. The cracks are so much easier to discern with the extra beans but the flipside is, the roast got away from me towards the end. My roasting computer is not connected to the internet so I can't post the profile, but here's a quick pic of the end result. A bit of tipping, I think I had the gun too close to the bean mass, again, I should have waited till I'd insulated.
    IMG_20160222_222853.jpg

    The other problem with the bigger roast is I'll have to rethink my bean cooler. I've been using a shop vac going to a bucket with a colander which has been fine for the 600g roasts but the extra 20% I guess is just too much. The hose melted from the extra heat leaving me to finish the cooling the same way as when I first started out, on a large roasting dish in front of a pedestal fan.

    We'll see how she goes in the cup, first to second crack was a bit fast for my liking, hopefully I get a pleasant surprise.
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  7. #7
    Senior Member artman's Avatar
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    Looks pretty good!

    Cheers

  8. #8
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Magnafunk
    I second Mal's suggestions.

    Insulating and lidding the pan should be a first priority. If you're currently getting tipping, it will only get worse with the bigger batch sizes and your greater volume of beans. With good insulation I rarely go over 550 on my Bosch gun with my 750-800g batches, even in winter (and it's pretty cold here in winter!) and have never even seen tipping or scorching. And I know that coastal roasters can sometimes even take 30-40 of my figures to achieve a similar profile.

    Not so sure about the big loaf, but I also had to drill a second probe hole in my BM about 20mm higher to account for bean mass - otherwise it read 10 out especially later in the roast, as the beans almost reached the lip leaving the probe waaaaayyyyy down the bottom. Also check your agitation at the end of the roast - I ended up extending my paddle as there wasn't much movement towards the end.

    Pre-heating is the other biggie (though it sounds like you're there already?) - for me preheating to about 120 and then loading with the gun running at a mild temp (say 150) took around 2-3 minutes off my total roast length from cold and dropped my input temps by about 50 - again aiding a smooth roast. I do it with smaller roasts too now.

    Other than that - welcome to the Corretto 'Big Batch' Club!

    Let us know how you go

    Matt

    (This was my own personal journey of discovery when moving from 350-750g batches - might be of some help in the early posts - but ended up going all sorts of funny destinations!)
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    Hi, how far in the bowl did you have your hg ? I run mine ( Makita ) about 20mm roughly , using heavy tray foil shaped for a lid , hole for the gun and a flap cutout on the opposite diagonal corner for exhaust , works well

    I must try some insulation one day .....

  10. #10
    Life-long Learner DesigningByCoffee's Avatar
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    My gun sits a bit above the lid height in a can 'chimney'. I do have a new lid ready when this roaster dies (though I just can't kill it so far - even 4-5 back to back roasts only trips the overheat circuit!) which has a tube splayed by an exhaust shop to suit the gun exactly like a holster without all the handle/gun support guff … see image two…

    DBC-Corretto-Hopper-1.jpg DBC-Corretto-Complete-Jun15.jpg


    BTW magnafunk… I had to adjust my cooler too from the colander style (just wouldn't cool) … large rectangular clothes rack basket from bunnings does the job a treat


    DBC-Bean-Cooler_FMD4611.jpg DBC-Bean-Cooler_FMD4613.jpg
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  11. #11
    Senior Member magnafunk's Avatar
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    I have plans to implement something along the line of your setup for my gun (although it won't be quite as professional looking) it was pretty close to the beans for my maiden run. As far as the cooler goes, I have access to plenty of food grade plastic buckets so will do some experimenting over the weekend. Thanks for the help everyone

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    i made the bucket cooler ....so easy, got that and the fan from bunnings ..... i got a round stainless steel sieve from a commercial catering supply place , put foam door seal on the bottom and away we go
    And of course some jisaw work .....

  13. #13
    Mal Dimal's Avatar
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    Behmor Coffee Roaster
    Quote Originally Posted by magnafunk View Post
    We'll see how she goes in the cup, first to second crack was a bit fast for my liking, hopefully I get a pleasant surprise.
    Agree with Artman...

    That batch doesn't look to bad at all and I think you will be very pleasantly surprised. Give it a couple of days to gas-off in 1-Way Valve bags and then start brewing. Haven't had a bad cup of Mt.Ambra yet...

    Mal.



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