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Thread: I just bought my first batch of green beans

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    I just bought my first batch of green beans

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    new roaster almost built. wish me luck

  2. #2
    Member sando's Avatar
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    Good luck

    Happy roasting

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    Life-long Learner DesigningByCoffee's Avatar
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    What type of roaster?

    Have fun!
    Matt

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    I have built a rotating Stainless colander using a electric can opener to power it. Im using a heat gun on a stand to roast them. I also mounted an exaust fan in a bucket for cooling the beans. I hope this thing works.
    I bought 2.5kgs of Rwanda Nyungwe. Would this be good for lattes?
    Cicarda likes this.

  5. #5
    Senior Member saoye's Avatar
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    Didn't want to go down the track of a corretto?

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    That a heat gun in a bread maker right? I want to be able to roast in a higher quantity. Correttos only do 200-300 gms?

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    Senior Member saoye's Avatar
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    Try 700g for a corretto. Others have gone much higher. My normal roast in a corretto is 600g
    Last edited by saoye; 24th November 2012 at 09:31 AM.

  8. #8
    Life-long Learner DesigningByCoffee's Avatar
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    Sounds interesting. Does the colander rotate? Or does the can opener power a mixing arm in the colander?
    I personally use a corretto -350g per batch, but can handle much more. 350g is a perfect amount for 1 weeks use in our house - keeps us in the 7-10 day sweet spot :-)

    Will wait with bated breath for the photo!

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    Life-long Learner DesigningByCoffee's Avatar
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    Nice!
    Certainly looks the part - look forward to hearing how it goes!

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    Senior Member Yelta's Avatar
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    Quote Originally Posted by rat_tat View Post
    That a heat gun in a bread maker right? I want to be able to roast in a higher quantity. Correttos only do 200-300 gms?
    The weekly roast quantity in my single loaf Coretto is 725 grams of green, roasts evenly, consistently and the results are repeatable.

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    Quote Originally Posted by Yelta View Post
    The weekly roast quantity in my single loaf Coretto is 725 grams of green, roasts evenly, consistently and the results are repeatable.
    That will be my plan be if this thing blows up. thanks

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    Senior Member Yelta's Avatar
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    Quote Originally Posted by rat_tat View Post
    Interesting setup, I could be wrong but my feeling is that heat loss is going to be a real problem, let's know how you get on.

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    Quote Originally Posted by Yelta View Post
    Interesting setup, I could be wrong but my feeling is that heat loss is going to be a real problem, let's know how you get on.
    will do...........

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    I just bought my first batch of green beans

    I had the same thought

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    CoffeeSnobs Owner Andy's Avatar
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    Lots of CS'rs roast in a stainless dog bowl with a heatgun and a wooden spoon to stir... so it can be done in an open style roaster ok.

    I love the setup of this, electric can opener motor is clever, nice low gearing and as long as not too much heat is transfered through the drive shaft it should be fine.

    Word of advice... don't try too many beans first few times, while you might be able to hold a kilo in there the limiting factor will be how much heat a 10amp heatgun can produce and if I had to guess I would say 500-600g would be about the limit. If you load it up too much the roasts will be too long or too motley.

    Plan "b" might be to try a camp stove on low flame under it, that would keep the basket warm and the heat gun will have more control over the roasting.

    Look forward to seeing how this one goes though.

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    Senior Member Bernsbrew's Avatar
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    Very impressed. Looks the cat's whiskers, ratty. Best of ...

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    Quote Originally Posted by Andy View Post
    Lots of CS'rs roast in a stainless dog bowl with a heatgun and a wooden spoon to stir... so it can be done in an open style roaster ok.

    I love the setup of this, electric can opener motor is clever, nice low gearing and as long as not too much heat is transfered through the drive shaft it should be fine.

    Word of advice... don't try too many beans first few times, while you might be able to hold a kilo in there the limiting factor will be how much heat a 10amp heatgun can produce and if I had to guess I would say 500-600g would be about the limit. If you load it up too much the roasts will be too long or too motley.

    Plan "b" might be to try a camp stove on low flame under it, that would keep the basket warm and the heat gun will have more control over the roasting.

    Look forward to seeing how this one goes though.
    Thanks for the advice Andy. Ill try 400gms first up, see how it goes. Cant wait to give it a go.

  19. #19
    Senior Member Yelta's Avatar
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    Quote Originally Posted by rat_tat View Post
    Thanks for the advice Andy. Ill try 400gms first up, see how it goes. Cant wait to give it a go.
    When are you planning the maiden voyage RT?

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    Quote Originally Posted by Yelta View Post
    When are you planning the maiden voyage RT?
    We set sail at 10am tomorrow morning. fingers crossed

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    smaller first roast.jpgMission successful!
    Although first crack was 16:40 . probably because i had the heat gun on low for the fisrt 5 mins and about 120mm away forom beans. I couldnt help my self and tried 500gms. maybe too much. second crack was at 20 mins. The roast turned out very even and slightly shiny. I was impressed with my first effort.

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    Life-long Learner DesigningByCoffee's Avatar
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    Nice! Well done.
    Sometimes shiny beans may mean you've gone into rolling second crack, which is at the darker end of the scale. Bit hard to tell from the pic how dark they actually are.
    A lot of roasters dump the instant the first pop of second crack is heard or just before (where a temp probe helps in which case the beans will look quite 'dry' on the outside for at least a few days. But I wouldn't worry too much about the 20min roast - most of mine in a corretto are about 18mins, and roasters like the Behmor seem to aim for about 20mins for 500g.
    What's more important - how does it taste!
    Matt

    And you have a proof of concept!

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    Thanks Matt
    Yeah it works better than i thought. I glad 20 min isnt too bad. Ill set the heat gun on full from the begining next time and dump as soon as i hear 2nd crack. I waited about 1 min into 2nd before i dumped.
    Ill see how it tastes 3 days time. patience patience patience hehe

  24. #24
    Life-long Learner DesigningByCoffee's Avatar
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    I'd still think about leaving some type of pre-warm for the first few mins (even if it is full power, but move the gun out 5cm or so), just to dry out the beans. If you go flat out right from the start you can get faults like divots/craters occurring.
    So a gentle warm is quite good form!

    But yes - also try pulling the beans back in degrees (30sec into second crack, right on second crack, just before second crack) and see what works the best in the cup for you. This is how we've all learnt!

    But you should be pretty happy with that for a first batch - to get to second crack with that amount in that ball park time is quite an achievement!

  25. #25
    Senior Member Yelta's Avatar
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    Quote Originally Posted by rat_tat View Post
    Mission successful!
    Although first crack was 16:40 . probably because i had the heat gun on low for the fisrt 5 mins and about 120mm away forom beans. I couldnt help my self and tried 500gms. maybe too much. second crack was at 20 mins. The roast turned out very even and slightly shiny. I was impressed with my first effort.
    Well done Ratty, a pretty good first effort, looks like your well and truly on the right track.

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    Quote Originally Posted by Yelta View Post
    Well done Ratty, a pretty good first effort, looks like your well and truly on the right track.
    Thanks Yelta

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    Quote Originally Posted by DesigningByCoffee View Post
    I'd still think about leaving some type of pre-warm for the first few mins (even if it is full power, but move the gun out 5cm or so), just to dry out the beans. If you go flat out right from the start you can get faults like divots/craters occurring.
    So a gentle warm is quite good form!




    But yes - also try pulling the beans back in degrees (30sec into second crack, right on second crack, just before second crack) and see what works the best in the cup for you. This is how we've all learnt!

    But you should be pretty happy with that for a first batch - to get to second crack with that amount in that ball park time is quite an achievement!

    So how long do i do this 'pre warm' ? then move gun closer
    ....................

  28. #28
    Life-long Learner DesigningByCoffee's Avatar
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    I reckon (IMHO) about 3mins is a good time :-)
    Matt

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    Wow! CS = always impressive!!

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    Quote Originally Posted by DesigningByCoffee View Post
    I reckon (IMHO) about 3mins is a good time :-)
    Matt
    Cheers Matt , Ill give it a try

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    Quote Originally Posted by DesigningByCoffee View Post
    you should be pretty happy with that for a first batch - to get to second crack with that amount in that ball park time is quite an achievement!
    Quote Originally Posted by Yelta View Post
    Well done Ratty, a pretty good first effort, looks like your well and truly on the right track.
    Too right...

    Excellent first roast 'rt' and especially considering you're using a method that not many of us have tried before. CSer inventiveness never ceases to both impress and amaze me. Terrific stuff...

    Mal.

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    Quote Originally Posted by Dimal View Post
    Too right...

    Excellent first roast 'rt' and especially considering you're using a method that not many of us have tried before. CSer inventiveness never ceases to both impress and amaze me. Terrific stuff...

    Mal.
    Thanks Mal, lots of luck on my side. cant wait till my next roast

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    2 days after roast. Pulled my first shot this morning using my first roast. It has a slight burnt taste to it. I wish i could describe in more CS lingo but i dont taste any sweetness. I think I over roasted. The beans look very oily now. Could sweetness develop within the new few days?

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    I couldnt finish my latte, eek. Should i through this batch away?

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    Senior Member fatboy_1999's Avatar
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    Don't throw them away.
    Keep trying a coffee each day with them and see if they improve.
    It does sound like they were roasted well into 2nd crack if they are very oily at 2 days post roast, but this is how we learn.
    If you are not enjoying them, by all means get some other beans to have as your daily coffee, but I would suggest you keep taste testing these for the next 6 days or so. If they really don't improve, then pull the next roast a bit earlier.

  36. #36
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Ratty
    Sometimes with dark roasted beans you need to use a much coarser grind/faster pour to prevent bitterness/burning in the shot, while with lighter roasts you can really tighten it up to almost dripping pour and not get bitter/burnt flavours. Just the nature of the roast depth. This is why most try and roast that bit lighter - it is easier to go one way than the other!
    I've had some roasts I've thought were overdone, but with a bit of playing with the grinder found them OK in the end (better in milk than straight espresso mind you). But they normally weren't that far into second crack.
    I'd initially try a slightly faster pour and test if it is any more drinkable - but if the beans really are actually burnt - then no amount of portafilter-gymnastics is going to help I'm afraid!
    Then you put it down to a $5 life lesson, and try again :-)
    Matt

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    Quote Originally Posted by fatboy_1999 View Post
    Don't throw them away.
    Keep trying a coffee each day with them and see if they improve.
    It does sound like they were roasted well into 2nd crack if they are very oily at 2 days post roast, but this is how we learn.
    If you are not enjoying them, by all means get some other beans to have as your daily coffee, but I would suggest you keep taste testing these for the next 6 days or so. If they really don't improve, then pull the next roast a bit earlier.
    ill keep trying them and see how they develop. cheers

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    Quote Originally Posted by DesigningByCoffee View Post
    Hi Ratty
    Sometimes with dark roasted beans you need to use a much coarser grind/faster pour to prevent bitterness/burning in the shot, while with lighter roasts you can really tighten it up to almost dripping pour and not get bitter/burnt flavours. Just the nature of the roast depth. This is why most try and roast that bit lighter - it is easier to go one way than the other!
    I've had some roasts I've thought were overdone, but with a bit of playing with the grinder found them OK in the end (better in milk than straight espresso mind you). But they normally weren't that far into second crack.
    I'd initially try a slightly faster pour and test if it is any more drinkable - but if the beans really are actually burnt - then no amount of portafilter-gymnastics is going to help I'm afraid!
    Then you put it down to a $5 life lesson, and try again :-)
    Matt
    i by coincidence ground it corser than usual and it was terible, bad channeling and very blond.
    I will do a lighter roast this afternoon. all a learning experience.

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    Life-long Learner DesigningByCoffee's Avatar
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    Too true :-)
    And worth persisting! When you truly nail your first home roast, you'll never look back!
    Matt

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    Looks imressive!!

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    2ndroast.jpg

    Just did my 2nd roast. An interesting experience....
    1stCR 16:08.... Couldnt get to second and stopped at29:00 . I think i had the gun too far away , about 15cm i gradually moved it closer ending up about 8cm away for the last couple of mins. The stopping point was when the can opener started to stall. Hot weather here in melb and a bit of heat transference through the shaft and the motor felt quite warm after 29 mins of work. The results look good though

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    Quote Originally Posted by Kevinjspark View Post
    Looks imressive!!
    Thanks.......

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    How did that second batch taste? Looks really tasty... Brb coffee!

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    Quote Originally Posted by marcism View Post
    How did that second batch taste? Looks really tasty... Brb coffee!
    I dont know yet. Ill try it tomorrow morning. I will let you know.

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    Quote Originally Posted by rat_tat View Post
    I dont know yet. Ill try it tomorrow morning. I will let you know.
    I just dialed it in on my grinder and machine. It looks tastes and smells unbelievable. Ill try it in a latte tomorrow morning. Im so happy and very suprised its ok after such a long roast not getting to 2nd crack.

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    Life-long Learner DesigningByCoffee's Avatar
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    Looks so much better than the first bacth Ratty
    Well done :-)
    Matt

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    Quote Originally Posted by DesigningByCoffee View Post
    Looks so much better than the first bacth Ratty
    Well done :-)
    Matt
    Thanks Matt, yeah that first batch has gotten oilyer and oilyer. I was talking to the Barister in Small Victories cafe in rathdowne st about it. He said he would be a bit worried about all the oil gumming up my new grinder.

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    Quote Originally Posted by rat_tat View Post
    I just dialed it in on my grinder and machine. It looks tastes and smells unbelievable. Ill try it in a latte tomorrow morning. Im so happy and very suprised its ok after such a long roast not getting to 2nd crack.
    Im sipping my Latte now. Not an amazing cup but very nice and very satisfying know that i roasted a decent batch in my dodgy little roaster. Im a happy camper.

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    Tested out my roaster today to see if the thing would turn after it stalled at the end of the last roast. No go, The can opener overheated and melted the grease from the gears inside on to the motor. I went to Savers today to see if i could get another electric can can opener but none there. BUT, they had a bread maker. Im going to give the Corretto a shot. wish me luck

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    Behmor Coffee Roaster
    P.S. I havnt given up on the open roast method. Ive ordered a new 12v motor from hong kong on ebay



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