Results 1 to 22 of 22

Thread: First roast using data logger.

  1. #1
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    First roast using data logger.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Roasted 500 grams of Sumatra Mandehling this after noon with the d/logger hooked up, all went ok up to the point of saving the resulting graph, the best I could do was this, see link at bottom.
    Could not for the life of me get it saved in the way it displays on the screen, Im obviously missing something, anyone?
    BTW the roast went very well, finished @ approx 220 degrees, 15 mins. :D


  2. #2
    Senior Member
    Join Date
    Jan 2008
    Location
    Brisbane, Queensland, Australia, Australia
    Posts
    1,756

    Re: First roast using data logger.

    Ive gotta go out in a sec Jon, if its not too late ill drop ya a Pm when i get home, gimme a ring and ill talk ya through displaying your profile properly in excel, like this;


  3. #3
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 1115332A2A2F302728460 link=1260345064/1#1 date=1260345547
    Ive gotta go out in a sec Jon, if its not too late ill drop ya a Pm when i get home, gimme a ring and ill talk ya through displaying your profile properly in excel, like this;
    Thanks Warren.

  4. #4
    Senior Member GrahamK's Avatar
    Join Date
    Jun 2009
    Location
    Ormiston - Brisbane
    Posts
    544

    Re: First roast using data logger.

    Hi Jon,

    If you look at the end of the thread http://coffeesnobs.com.au/YaBB.pl?num=1214989367

    I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts. It has instructions etc. It was provided based on use with a Hottop, but you may find it useful as well.

    Regards,
    Graham

  5. #5
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 1421323B323E18530 link=1260345064/3#3 date=1260416844
    Hi Jon,

    If you look at the end of the thread http://coffeesnobs.com.au/YaBB.pl?num=1214989367

    I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts. It has instructions etc. It was provided based on use with a Hottop, but you may find it useful as well.

    Regards,
    Graham
    Thanks Graham, will have a play.

    Cheers,

    Jon.

  6. #6
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 7144575E575B7D360 link=1260345064/3#3 date=1260416844
    I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts.
    Well got it up and running Graham, heres a link to it, comments welcome.


  7. #7
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,957

    Re: First roast using data logger.

    Some photos of the completed roast would probably be helpful too John....

    Mal.

  8. #8
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 6A47434F422E0 link=1260345064/6#6 date=1260543055
    Some photos of the completed roast would probably be helpful too John....

    Mal.
    Will put it on todays list of things to do Mal. :)

  9. #9
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    OK this is the end result, 500 grams of Sumatra Panjang Mandheling.
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    At the time of posting the pic had not tried this batch, have since done so and am not exactly over the moon about it, reckon I stopped too early, its quite light and has an earthy taste! I suspect taking it to second crack would have improved it out of sight.
    This was the last of the bag, as I recall previous darker roasts have been much better, sadly I made no notes so am really only guessing, wont make the same mistake again. :)




  10. #10
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,957

    Re: First roast using data logger.

    Gday Jon,

    Overall, I would say the roast is a little light with the unevenness not at all unusual for beans from this region. Some beans actually appear to be slightly burnt but that may be down to the lighting, etc....

    Even tough you may not enjoy brews made with them at the moment, keep trying them every day to take note of how the flavour develops. Given the lightness of the roast, you may have to consider brewing with other than an espresso machine.... To that end, try using a pour-over, filter, syphon, or other manual method that takes advantage of the varietal flavours that will come to the fore. Definitely worth doing.

    With your next roast batch, try to see if you can replicate the profile listed by Warren above. Something akin to that will be more suited to espresso brewing I believe. I guess the most difficult thing to gain control of with Corretto roasting, is the heat input. Youve got to try and find the balance that allows adequate control over the roast profile but avoids burning the edges of the beans (called tipping) as this will contribute an exaggerated ashiness to the flavour of the brew, far in excess of the proportion of the beans that actually display tipping. Earthiness is not a bad trait though and one that is to be expected from most Mandheling beans; an over-riding earthiness will be down to the lightness of the roast and will dissipate the longer the beans are rested.

    Thats probably enough to be going on with mate so hope some of this is helpful... :)

    All the best,
    Mal.

  11. #11
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 604D494548240 link=1260345064/9#9 date=1260692921
    Gday Jon,

    Overall, I would say the roast is a little light with the unevenness not at all unusual for beans from this region. Some beans actually appear to be slightly burnt but that may be down to the lighting, etc....

    Even tough you may not enjoy brews made with them at the moment, keep trying them every day to take note of how the flavour develops. Given the lightness of the roast, you may have to consider brewing with other than an espresso machine.... To that end, try using a pour-over, filter, syphon, or other manual method that takes advantage of the varietal flavours that will come to the fore. Definitely worth doing.

    With your next roast batch, try to see if you can replicate the profile listed by Warren above. Something akin to that will be more suited to espresso brewing I believe. I guess the most difficult thing to gain control of with Corretto roasting, is the heat input. Youve got to try and find the balance that allows adequate control over the roast profile but avoids burning the edges of the beans (called tipping) as this will contribute an exaggerated ashiness to the flavour of the brew, far in excess of the proportion of the beans that actually display tipping. Earthiness is not a bad trait though and one that is to be expected from most Mandheling beans; an over-riding earthiness will be down to the lightness of the roast and will dissipate the longer the beans are rested.

    Thats probably enough to be going on with mate so hope some of this is helpful... :)

    All the best,
    Mal.
    Thanks Mal,
    Appreciate your thoughts, certainly plenty to think about there.
    Cant say I like the earthy flavour so perhaps the Mandheling beans are one for me to avoid in the future.
    Have been contemplating resurrecting the siphon, perhaps now would be a good time, just might learn something.

    Cheers,

    Jon. :)


  12. #12
    Sleep is overrated Thundergod's Avatar
    Join Date
    Jul 2006
    Location
    Sydney
    Posts
    10,496

    Re: First roast using data logger.

    Quote Originally Posted by 3B070E1603620 link=1260345064/8#8 date=1260607195
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    Flash lighting always makes it difficult to diagnose over the internet.
    There does though appear to be quite a few lighter beans.

    A close up look shows some beans with tipping and possibly some getting towards burnt in patches as Mal has suggested.

    The tipping has never bothered me taste wise but I have tried to avoid it if possible when roasting.
    It all comes down to practise.

    Try find a bean thats less prone to uneven roasting and stick to that for a while.

    Ive roasted over 60kgs of PNG Kimel.
    Im not saying to do the same, but the more roasts you do on the one bean, the more youll learn about consistency in your roasting.
    From there you can transfer what youve learned across to other beans.


  13. #13
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 7844594248495E4B43482C0 link=1260345064/11#11 date=1260698835
    Quote Originally Posted by 3B070E1603620 link=1260345064/8#8 date=1260607195
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    Flash lighting always makes it difficult to diagnose over the internet.
    There does though appear to be quite a few lighter beans.

    A close up look shows some beans with tipping and possibly some getting towards burnt in patches as Mal has suggested.

    The tipping has never bothered me taste wise but I have tried to avoid it if possible when roasting.
    It all comes down to practise.

    Try find a bean thats less prone to uneven roasting and stick to that for a while.

    Ive roasted over 60kgs of PNG Kimel.
    Im not saying to do the same, but the more roasts you do on the one bean, the more youll learn about consistency in your roasting.
    From there you can transfer what youve learned across to other beans.
    Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. ::)

  14. #14
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,957

    Re: First roast using data logger.

    Quote Originally Posted by 724E475F4A2B0 link=1260345064/12#12 date=1260702917
    Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. ::)
    You could pretty well settle on any decent PNG varietal for roast evenness and ease, ditto for decent Peruvians, Colombians and Tarrazu varietals too. Have a glance through the Green BeanBay selections and read through Andys notes, he makes mention of bean varietals available that are easy roasters.... :)

    Mal.

  15. #15
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 072A2E222F430 link=1260345064/13#13 date=1260712552
    Quote Originally Posted by 724E475F4A2B0 link=1260345064/12#12 date=1260702917
    Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. ::)
    You could pretty well settle on any decent PNG varietal for roast evenness and ease, ditto for decent Peruvians, Colombians and Tarrazu varietals too. Have a glance through the Green BeanBay selections and read through Andys notes, he makes mention of bean varietals available that are easy roasters.... :)

    Mal.
    Thanks for the tips Mal, will do.

    JW.

  16. #16
    Senior Member Koffee_Kosmo's Avatar
    Join Date
    Apr 2008
    Location
    Brisbane
    Posts
    5,113

    Re: First roast using data logger.

    Quote Originally Posted by 073B322A3F5E0 link=1260345064/8#8 date=1260607195
    OK this is the end result, 500 grams of Sumatra Panjang Mandheling.
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    At the time of posting the pic had not tried this batch, have since done so and am not exactly over the moon about it, reckon I stopped too early, its quite light and has an earthy taste! I suspect taking it to second crack would have improved it out of sight.
    This was the last of the bag, as I recall previous darker roasts have been much better, sadly I made no notes so am really only guessing, wont make the same mistake again. :)



    I recently roasted 600gr this bean
    My notes are
    11.30 first crack
    16.10 second crack
    Pulled & cooled 40 seconds into 2nd crack

    Got a rich ooozy pour and chocolate flavours after 6 days degas

    RE photos with flash
    Learnt from similar photo mistakes to you
    I found that taking photos at an angle gives better realistic photos (but still does not make me a better photographer)

    KK

  17. #17
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 193D343437370D193D213F3D520 link=1260345064/15#15 date=1260760158
    Quote Originally Posted by 073B322A3F5E0 link=1260345064/8#8 date=1260607195
    OK this is the end result, 500 grams of Sumatra Panjang Mandheling.
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    At the time of posting the pic had not tried this batch, have since done so and am not exactly over the moon about it, reckon I stopped too early, its quite light and has an earthy taste! I suspect taking it to second crack would have improved it out of sight.
    This was the last of the bag, as I recall previous darker roasts have been much better, sadly I made no notes so am really only guessing, wont make the same mistake again. :)



    I recently roasted 600gr this bean
    My notes are
    11.30 first crack
    16.10 second crack
    Pulled & cooled 40 seconds into 2nd crack

    Got a rich ooozy pour and chocolate flavours after 6 days degas

    RE photos with flash
    Learnt from similar photo mistakes to you
    I found that taking photos at an angle gives better realistic photos (but still does not make me a better photographer)

    KK
    Interesting, Stopped mine @ a touch over 15 before second crack, I had a feeling they were a little under done, discovered I have another kilo of this one so will roast some more in a few days and take it a little past 2nd crack.
    Thanks for the tips. :)

  18. #18
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 4B66626E630F0 link=1260345064/9#9 date=1260692921
    Even tough you may not enjoy brews made with them at the moment, keep trying them every day to take note of how the flavour develops.
    You were right Mal, 7 days after roast and the taste/flavour has changed significantly, most of the earthiness has disappeared and it really has improved, particularly with milk. :)

  19. #19
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,957

    Re: First roast using data logger.

    Quote Originally Posted by 526E677F6A0B0 link=1260345064/17#17 date=1260916539
    You were right Mal, 7 days after roast and the taste/flavour has changed significantly, most of the earthiness has disappeared and it really has improved, particularly with milk. :)
    Excellent news Jon...

    Mal. :)

  20. #20
    Senior Member
    Join Date
    Mar 2008
    Posts
    433

    Re: First roast using data logger.

    so "time heals all wounds" then?

  21. #21
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Quote Originally Posted by 14222926332835470 link=1260345064/19#19 date=1261117622
    so "time heals all wounds" then?
    Not completely, its improved but still a long way from being one of my favourites. :(

  22. #22
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,933

    Re: First roast using data logger.

    Behmor Coffee Roaster
    Quote Originally Posted by 665A534B5E3F0 link=1260345064/8#8 date=1260607195
    OK this is the end result, 500 grams of Sumatra Panjang Mandheling.
    The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
    At the time of posting the pic had not tried this batch, have since done so and am not exactly over the moon about it, reckon I stopped too early, its quite light and has an earthy taste! I suspect taking it to second crack would have improved it out of sight.
    This was the last of the bag, as I recall previous darker roasts have been much better, sadly I made no notes so am really only guessing, wont make the same mistake again. :)


    Roasted another batch of this yesterday, took it to second crack, different result altogether, no trace of the earthy notes, could even benefit from another minute or so longer, very pleased with the result. ;D



Similar Threads

  1. USB Temperature Data Logger - RML (Roast Monitor Language)
    By Andy in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 121
    Last Post: 24th January 2019, 12:16 PM
  2. Roast monitor software - different data logger
    By Rigman40 in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 2
    Last Post: 8th November 2012, 01:16 PM
  3. USB Data Temperature Logger !
    By Anja_Schuhmann in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 1
    Last Post: 24th February 2010, 08:05 PM

Posting Permissions

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