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Thread: Corretto advice

  1. #1
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    Corretto advice

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Finally, Ive got everything for my corretto. Set them all up, and had a go. BAD NEWS~~My first roast was not sucessful, but it is very even (one thing that im pleased of). The temperature went crazy, I couldnt control it at all. And i cracked my probe due to i forgot to remove it :(. O well it still works, who cares.... Anyway, *Ive got a couple of questions~~
    My Setup:
    Heat gun: Ryobi 2 heat EHG 2002
    Tripod for adjusting the height of the heat gun.
    Breadmaker: Palsonic *PAB-3600 (Added switch, now can spin for a long time)
    DMM: QM-1324
    Roasted 300g of MT Bin549

    My question is should i turn the heat gun to the highest heat setting? Thats what i did today. The temperature went up very quick. It reached over 100 degree within 4 mins. I tried to adjust the height, but the temperature kept increase very quick. What i think i did wrong was, I set the heat gun too close to the bean. But initially, I set the HG to its highest heat setting and I set it about 4cm above the edge of the breadmaker, the temperature increased very very slow. Then i lower it down to about the same height of the edge of the breadmaker, then the temperature started to go crazy. Then, I turned the heat of the HG down, the temperature dropped significantly. So i turned it back to the hightest heat, then the temperature went crazy. Any suggestion that i can improve?

    Tony


  2. #2
    Senior Member greenman's Avatar
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    Re: Corretto advice

    Hi Tony, I run my heatgun on full speed initially inside the bucket approx 10cm from beans, it takes about 1.40 to reach 50C and then picks up pace, I then raise the gun gradually with 100C coming up around the 3-3.5min mark depending on beans I am roasting. I try and reach 1st crack around 12-13min mark and then 5-6 minutes from 1st to second crack. Watching the probe readout helps to control your application of heat, after several roasts you get to know the visual signs of smoke before 1st and 2nd crack and watching the colour of your beans at each stage. You want a constant ramp up of heat without stalling the roast.
    Im sure after a few roasts you will get a feel for your setup and things will improve markedly............good luck and happy roasting!!

  3. #3
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    Re: Corretto advice

    It could also be that your probe might not be in the right place. Maybe you should fiddle round with probe heights vs. temperature readings

  4. #4
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    Re: Corretto advice

    How large was the batch of beans?

    Tony where is the probe in relation to the gun?

    How deep was the probe in the bean mass?

  5. #5
    Senior Member GregJW's Avatar
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    Re: Corretto advice

    Hey there, Tony.

    I think everyone feels like they have no control on their first Coretto roast (well, I did!). Dont worry, youll quickly get the hang of it.

    I have a 2 speed HG like you and (I think like everyone) only use the high setting, controlling the temperature increase by adjusting its height. The temp certainly does get a go on at first crack and youll find thats when you have to ease the HG back so as to get a slow, even (5-6 min) climb up to second crack. I closely watch the DMM temp there - invaluable tool. My probe goes through the wall of the pan, about 1 cm above the bottom, and about 3 cm into the bean mass. (And I used to forget to pull the probe out as well, ruined one probe :-[, but you get into a routine.)

    I dont know your breadmaker but I think youll find the optimum batch size to be larger than 300 gm (say, 500-600 gm?), easier to control temp increase as well.

    By practice and playing around with your setup, youll quickly get the feel of it.

    Greg.


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    Re: Corretto advice

    Ill post some picture tomorrow

  7. #7
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    Re: Corretto advice

    Did another roast yesterday. I roasted 300g Costa Rica bean that i bought from bean bay last month. It went pretty well. Ive got a better temperature control this time. But I reckon i roast the bean sa little bit too dark ~CS10 i think. Anyway, Ill try it again next time (After ive finished my last 2 roasts~~I had a laugh).


  8. #8
    Senior Member Luke_G's Avatar
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    Re: Corretto advice

    Hi guys, im very new to Coretto roasting. In fact i have never actually doit.
    I was due to recieve a Hot Top roaster as a gift from my boss but due to the current state of the stock market...that didnt happen :(
    I have found myself buying from a local roaster recently as im too scared of ruining more of my green bean colection.

    Anyway, i remembered i own an old Panasonic SD-206 bread maker and was wondering if it would be suitable?

    I have used the air popper method for around 2 years now but my current crop of poppers just isnt up to the task(too hot too quick). Or maybe my tastes have just changed.

    Is there a big transition from popper to coretto? Im going to grab the next cheap heat gun i can find. It sounds like a duel heat option is the way to go as the heat gets adjusted by the hight of the gun right?


  9. #9
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    Re: Corretto advice

    You should be able to translate what youve learned from roasting in the popper to roasting in a corretto if you do a bit of reading on it.

    Check to see how long the Panasonic will run the paddle without stopping.
    You need it to last 20 minutes non-stop.
    Otherwise you will need to modify it.

  10. #10
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    Re: Corretto advice

    Sorry for the delay of the pictures due to massive load of works from work and uni. Anyway, Im very happy with my corretto. This is my 3rd corretto roast. Im impressed with the result. Im loving it ;D. Got a question, am i mean to turn on the fan for the whole roasting process? I found it affects the heat deliver to the bean. When i turn off the fan, the temperature increased a lot faster. So Im not sure

    Tony.

    My corretto setup~~


    300g of Costa Rica Royal Tarrazu


    Start roasting (can see the probe from this photo. But the probe noramlly covered by beans).


    Start getting brown


    1st crack


    Pour out the roast when it reached the first snip of second crack. (No picture for that becos I was too busy cooling the beans :D)

    Finished roasting and weight (Weight lost: 15.6% pretty gd)


    CS9

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    Re: Corretto advice

    Cupped the last patch. Im very impressed with the taste. Very gd~Have to do more roasting this weekend~I love the spicy from the Costa Rica bean~~And the acidity of the bean is not aggressive at all. Although it is very high in acidity, however it is very gentle and smooth.

  12. #12
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    Re: Corretto advice

    Nice looking roast there Tony... 8-)

    Well done mate [smiley=thumbsup.gif]. I agree with you about the Costa Rica Tarrazu too, an excellent bean and well spotted by Andy....

    Mal.

  13. #13
    Senior Member greenman's Avatar
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    Re: Corretto advice

    Welcome to Corretto World Tony, the fan you are using is huge, I use a little $10 one from Bunnings to disperse the chaff and it doesnt affect the heat.


  14. #14
    Senior Member flynnaus's Avatar
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    Re: Corretto advice

    Hey GM

    I see the GMC is based on a Breville BM. Which model is it?

    Ive got a BB200 and it looks like I will have to carry out the bypass mod to link the paddle motor directly to the power to get continuous stirring. I see youve done another mod to provide a plug for your DMM. Where do you have the temp probe? Drilled through the side or hanging over the edge of the pan?

  15. #15
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    Re: Corretto advice

    Quote Originally Posted by greenman link=1226320162/0#12 date=1227561274
    Welcome to Corretto World Tony, the fan you are using is huge, I use a little $10 one from Bunnings to disperse the chaff and it doesnt affect the heat.
    I use the large fan and sometimes use it on high to drop the heat if it gets away from me.
    Lo and Med are quite fine most of the time.

  16. #16
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    Re: Corretto advice

    Yeah, nice looking roast Tony.
    I use a big fan too, but only ever on low.
    Only used to have it on high for cooling the beans by dropping them between collanders in front of it at the the end of the roast.
    Now that Ive finally made a proper bean cooler, it doesnt get too high at all.
    Flynn, I think you will find that the plug is in fact the temp probe handle in gms setup, with the probe going through holes in the BM body and into the bin.

    Cheers,
    Alan

  17. #17
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    Re: Corretto advice

    Nice roast Tony I too use a large fan on a pedastal on low speed, but I can control the heat of my heatgun.

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    Re: Corretto advice

    This is my 3rd corretto roast. It went very good (I think). FC started at ~16mins (But i dont know when did it finish [Cant here :(]) and stopped roasting at SC. What does everyone think? Can someone give me some advice? I reckon the graph looks alright. Maybe i should make the FC comes earlier next time .


  19. #19
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    Re: Corretto advice

    I agree.
    The temp rise from 5 minutes on looks a bit slow.
    I aim for FC at about 10-11 minutes and SC at about 15-16.

    The question is...how does it taste?

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    Re: Corretto advice

    Thx for the comment Thundergod.
    However, i just roasted it today so I reckon ill be able to tell u after 7 days~~~I had a laugh

  21. #21
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    Re: Corretto advice

    Ok~~Ive created a simulation graph for my next roast~This will be my guide for the next roast~What does people think about it? Please give me some comment.




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    Re: Corretto advice

    And the table as well~~


  23. #23
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    Re: Corretto advice

    Looks bloody good mate.
    Id be happy if I could do that.
    Good luck.

  24. #24
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    Re: Corretto advice

    Umm, just a quick question. Im looking at assembling a corretto over the next couple of months.

    I dont have any of the equipment yet, so, are there any particular models of bread mahines/heatguns that Im better off purchasing? Like, is it wise to go with a heatgun that has adjustable digital controls, etc etc. ?

  25. #25
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    Re: Corretto advice

    Hi Pat and welcome to Coffee Snobs and the wonderful world of Corretto roasting.
    Generally the brand of BM that you end up with will depend on what you can lay your hands on at the time for the least outlay. They can all be modded to bypass the control panel and run continuously if need be. It is not necessary to have a heat gun with adjustable controls as very precise control is achieved by adjusting the height of the heat gun. I actually have an adjustable HG but never use the heat control. Its always on the highest setting.
    Others may have differing opinions on this.

    Cheers,
    Alan

  26. #26
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    Re: Corretto advice

    I had no problem with adjusting the heat by raising or lowering the heatgun.
    Lately though, with my new adjustable one Ive been trying to use the guns heat control.
    I still vary the height though when in need of an immediate adjustment.

    Pat if you can find a breadmaker that will run continuously for 20 minutes it wont need modification.
    But as Alan said, they can all be modified to bypass the existing controls if need be.

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    Re: Corretto advice

    Yeah great, cheers guys. Just checking out ebay at the moment, there are quite a few cheap ones around. Same with the heat guns.

    I reckon Ill use an old mic stand to mount the gun, and adjust the hight.

    Whats the story with the temperature guage (probe?). This needs to be in with the beans, or through the side of the BM, yeah?

  28. #28
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    Re: Corretto advice

    The temp probe through the side of the BM body and bin seems to be the best option. The tip of the probe needs to be within the bean mass. Mount it in a corner so that it doesnt foul the paddle.
    You just need to remember to pull the probe out before pulling the bin to dump the beans at the end of the roast or else you end up with a bent probe.

  29. #29
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    Re: Corretto advice

    There are a few ways to insert the probe into the bean mass.

    You can mount it into the bin down the inside if you can figure a way to secure it.

    You can drill a hole in the bin only and push the probe in and run the cord out to the meter (this work with soft probes).

    You can drill a hole from through the body of the BM all the way through to the bin and insert. This work well with solid probes but if you forget to remove them they get damaged easily.

    Aldi have BMs on sale next week for $69.
    Large ones (twin paddles).

  30. #30
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    Re: Corretto advice

    Excellent, thankyou.

  31. #31
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    Re: Corretto advice

    Quote Originally Posted by Pat Breen link=1226320162/20#26 date=1228980376
    Yeah great, cheers guys. Just checking out ebay at the moment, there are quite a few cheap ones around. Same with the heat guns.

    I reckon Ill use an old mic stand to mount the gun, and adjust the hight.

    Whats the story with the temperature guage (probe?). This needs to be in with the beans, or through the side of the BM, yeah?
    Hi Pat, welcome to CoffeeSnobs. :)

    Regarding buying a heatgun off ebay, Id be heading for a large hardware chain to buy it. You can get them there for under $20, or pay up to $180, but the point is they will honour the warranty, where an ebay supplier may not. A high number of heatguns fail - I believe that manufacturers figure that the average home handyman will only use them a few times, so while they market them and warrant them as being "tough", they cut corners in manufacturing. One day last year, I had to return two heatguns on the same day - the replacement failed as well. Some people buy the cheapest gun they can find, and it just goes and goes. I now have the Makita HG1100, it hasnt skipped a beat in 12 months (touch wood), but I paid $165 for it. (Less the cost of the faulty one I was returning).

    Ebay is great for a lot of purchases, but being able to jump in the car, replace your heatgun and continue roasting makes a lot more sense. :)


  32. #32
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    Re: Corretto advice

    Hehe~~did another roast today. Here is the graph. Im quite happy witht it. FC started @ 13m:11sec. SC came a little quick (~4mins after FC). Still have a little bit of tipping, dont know y? I reckon ill stick to this roasting profile next time. Ill try to extent the time between FC and SC. *What does everyone think?


  33. #33
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    Re: Corretto advice

    Behmor Coffee Roaster
    Not bad.
    See how it tastes.

    Id be aiming to hit FC about 2 minutes sooner and see if you can hit SC with a 5-6 minute gap from FC.



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