Results 1 to 10 of 10

Thread: First Roast - Not So Good

  1. #1
    Junior Member
    Join Date
    Jun 2009
    Posts
    12

    First Roast - Not So Good

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I used one of my 8 sample 1lb packages from Sweet Marias. *It was Brazil Ipanema "tree dry process". *I guess thats about 450grams. *Turning the BM on knead cycle tossed the beans real fast and some came flying out. *So I placed a piece of plywood cut to fit over the top of the bucket with an access opening to see the beans and place the heatgun. *I set the Metabo HG on medium (about 500 - 600F). *At about 12 minutes, I did not hear the FC but so much noise from the BM and HG, I shut the paddle off to listen. *Since I did *not hear cracking, I tried to turn the paddle back on, but got a hot temp warning and the BM would not come back on. *So I flipped the plywood off and put the HG on high (1000F) and stirred the beans with a wooden dowel. *They were now turning a nice brown tone and cracking loud, but not all of them. *Lots of smoke now and Im getting into 18minutes and have no idea where things are at, so I stop and place the beans in a fan cooled colander. *
    I placed the beans in a glass jar with the lid open for about 12 hours and tried them the next morning at breakfast. *It was drinkable, but not very good. *My regular coffee is a store bought french roast. *
    I think I will next try using the HG over a mesh colander inserted into a stainless steel bowl and stirring the beans manually. *This way I can do smaller roasts until I figure out what is going on ... less noise and stress. * Does this make sense? *Thanks

    Jon

  2. #2
    Senior Member
    Join Date
    Nov 2006
    Posts
    1,077

    Re: First Roast - Not So Good

    Hi there
    For a start your temp is way too low.
    According to a conversion 600F is only 315C, i generally start my roasts at bout 600C which is 1112F and then back off the temp of the HG as it starts to get to about 180C so that between FC and SC the temp raises about 3degC per minute,
    FC is generally about 205C and SC about 220C approx.

    Hope this helps
    Mal

  3. #3
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: First Roast - Not So Good

    Hi Jon,

    What you have to do is locate the heat sensor in the BM ..... It will be attached to the inside wall of the BM heating chamber ...... to access you need to remove a few screws , eyeball it and pull it out . If its like mine the BM will not run with it unplugged , so you have to move it as far away from the heating chamber and cable tie it to the opposite wall ......

    Whilst having a Thermonitor with a thermocouple is not essential , I can tell you for a novice it make the whole roasting thing a LOT easier...... and then look at some roasting profiles and just follow them minute for minute.

    good luck, ... and have fun !!!!

  4. #4
    Junior Member
    Join Date
    Jun 2009
    Posts
    12

    Re: First Roast - Not So Good

    Hi Bolb,

    I tried a smaller batch, 225g in a steel mesh colander. I set the heatgun on high and it brought the beans cracking in about 5minutes. I turned the heat down a bit and stopped the roast at 8minutes. It was a real easy process, but wont know how they did until tomorrow morning. Thanks for your help.

    hotshod,

    I removed the heat sensor as you suggested and taped it out of the way, and removed the heating element as well. Ill try this again after I get more experience with smaller batches using the colander and stainless steel bowl. Thanks.

    Jon

  5. #5
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: First Roast - Not So Good

    Jon

    If your using a 1kg BM , make your batches at least 350 - 400 g ...... I think EVERY CS corretto roaster makes the same mistake and cautiosly starts with batches that are too small ...... I did and Im still a bit guilty of doing that.

    No doubt you have had a good look thru the CS site and see other examples of what your corretto should look like
    with HG being height adjustable , and thus more temp control ....

    Im no expert , only done about 6 roasts but its obvious that you need to monitor closely the temps min by min and maintain an increasing heat curve.
    My reading from others far more experienced than me suggest that FC will happen between 200-205*c, and probably between 9min and 12min ..... most of mine are aimed at hitting that FC tem at 10-30 min...... with SC 5-6min later at 219-224*c

    hang in there and get your self a thermometer of some sought....... plot each min and a desired temp to hit.

    Something like this ...... I start counting when I hit min 1 temp , then at min intervals
    Min 1 60* / 85 / 105 / 125 / 140 / 155 / 170 / 180 / 190 / 200 / ..... FC .... after this I just try to increase by 3-4* per min to SC .... then pull

    good luck
    hotshod

  6. #6
    Senior Member greenman's Avatar
    Join Date
    May 2007
    Location
    Perth, Western Australia
    Posts
    3,160

    Re: First Roast - Not So Good

    Hi Jon, welcome to the wonderful world of home roasting, a thermocouple is invaluable in helping to monitor and control your roasts.
    Batch sizes--I started doing 300g roasts and the beans ended up all over the place, I now only do 600g roasts which give me 500g of roasted beans.
    As bolb stated your temps were all wrong, follow his advice on temps and use a thermocouple and you will get good results.
    Try to reach first crack around 10-13min and then 3C per minute until second crack about 5-6 minutes after that.
    Good luck and enjoy the journey
    gm :) :) :)

  7. #7
    Junior Member
    Join Date
    Jun 2009
    Posts
    12

    Re: First Roast - Not So Good

    Hi hotshod, *I guess I need to get a thermocouple and do more monitoring as you and others suggest. *I was hoping I could get by without a temp monitor and just hand hold the heatgun and use the senses to gauge it. *Thanks.

    gm,
    I think youve hit on one of my problems, not having enough beans so they fly all around. *My machine is rated for a 2lb loaf and with 450 grams of beans the paddle wheel is not covered. *Is it necessary to mount the heatgun on an adjustable fixture or do folks also hold the gun by hand? *Thanks again for your advice.

    Jon

  8. #8
    Senior Member
    Join Date
    Nov 2006
    Posts
    1,077

    Re: First Roast - Not So Good

    I have my gun mounted on a beer bottle capper but drill stands and tripods also work. Doing this helps keep your hands free plus i dont think i could keep my hands and HG in the desired position for consistency for much longer than a few minutes,

    Some form of stand can only be beneficial.

    Mal

  9. #9
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: First Roast - Not So Good

    Jon...Jon...Jon

    Your asking all the right questions , but you really need to check out all the weird and wonderful corretto designs that appear on this sight ....

    A picture tells a thousand words........ but what works for you is up to your imagination ...

    http://coffeesnobs.com.au/YaBB.pl?num=1154442377

    http://coffeesnobs.com.au/YaBB.pl?num=1210948224

    http://coffeesnobs.com.au/YaBB.pl?num=1221546503

    http://coffeesnobs.com.au/YaBB.pl?num=1218940450

    http://coffeesnobs.com.au/YaBB.pl?num=1216735141


    http://coffeesnobs.com.au/YaBB.pl?num=1205328203

    http://coffeesnobs.com.au/YaBB.pl?num=1205662624


    Hang in there

    hotshod









  10. #10
    Junior Member
    Join Date
    Jun 2009
    Posts
    12

    Re: First Roast - Not So Good

    Behmor Coffee Roaster
    Hotshod, thanks for putting all the info at my fingertips. Ive been going through them, and its very helpful.

    Jon



Similar Threads

  1. Is this roast any good do you think?
    By shapeshifter in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 7
    Last Post: 1st January 2011, 04:09 PM
  2. Replies: 22
    Last Post: 17th July 2007, 03:34 PM
  3. Newbie gets Good roast
    By yankeetrader in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 4
    Last Post: 12th December 2004, 10:27 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •