Results 1 to 14 of 14

Thread: Heat Gun limits size of Corretto roast

  1. #1
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Heat Gun limits size of Corretto roast

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Im still finding the limits of my corretto.

    After a bit of encouraging from other roasting snobbers I lifted the roast size to 500g, at this level my paddle was well covered.
    The limitting factor turned out to be my 1600W Ryobi heat gun. I ran the gun on high the whole time with a piece of timber place on top of the basket partially covering it.

    With 500g in the basket I was running slow and low temps the whole way up the roasting curve ..... Finally at 15.40min I hit a FC at 192 ..... and it continued for some time , hit SC at 214 after 23min .

    I guess without a more powerful 2000W HG , I will have to bring roast volume down to 400g that the current HG can cope with.

    any thoughts

    Greg

  2. #2
    Senior Member
    Join Date
    Feb 2009
    Location
    North Rothbury, NSW
    Posts
    1,104

    Re: Heat Gun limits size of Corretto roast

    Hi Greg

    I have a 1600 watt Black & Decker heat gun and have no problem getting the heat up with a 500gm roast.

    I have a Breville BB410 bread maker and have the heat gun on a tripod so I can get the gun in the bread pan.

    There is a couple of pictures here

    http://coffeesnobs.com.au/YaBB.pl?num=1236988318

    Are you getting the heat gun close enough? Just an idea...

    Chris

  3. #3
    Senior Member
    Join Date
    Nov 2006
    Posts
    1,077

    Re: Heat Gun limits size of Corretto roast

    I guess if cksyd can get there with his B&D unit then you should be able to as well, if you have a fan blowing over the whole setup, how strong is it. If it is too strong then this can tend to draw the heat up and away from the BM as the cool air flows over the top.

    I generally have the nozzle of the heat gun about 5 - 8cm away from the top of the bean mass.

    Mal

  4. #4
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: Heat Gun limits size of Corretto roast

    Thanks guys ....

    I can see where my problem is !!!! ..... Im using a drill press stand arrangement , with the HG placed where the drill would be. Unfortunately part of the drill stand hits on the top edge of the BM..... Leaving my HG with extension inplace (70mm heat speader) about 3mm higher than the BM basket.
    This gives me good control , but is often a bit slow to getting going.......temps from 110* to about 170* are always about 6-10* below where I want them min by min , after that it catches up and is OK ..... mind you with 500g in the basket today it never really caught up .

    Just guessing , I think the HG would be 11-13cm from top of bean mass...

    Looks like some more mods are called for ..!!!


    Cheers

  5. #5
    Senior Member
    Join Date
    Feb 2009
    Location
    North Rothbury, NSW
    Posts
    1,104

    Re: Heat Gun limits size of Corretto roast

    Glad to help Greg,

    My first roast in the corretto, I had the tripod on the table with the legs down as far as they could go, and I had the same problem - gun too far away.

    It was a pretty comical sight seeing me running everywhere looking for stuff to lift the bread machine toward the heat gun, but you learn from your disasters ;D

    Get that gun closer and should all be good.

    Chris

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

    Re: Heat Gun limits size of Corretto roast

    Hi Greg, I use the Ryobi and have no problems with heat, I tried the flared extension for a while but didnt like it, Ive made an extension to the bucket out of a foil food container, this contains any flying beans and helps keep the heat where I want it, I start out with the gun near top of bucket and gradually move it away as roast progresses, I roast in my garage out of any breeze and use a small fan to disperse chaff and cool hg body. first crack around 11-13min 200C, second crack 5-6min later 218-220C at 3C per min between first crack and second crack.

  7. #7
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: Heat Gun limits size of Corretto roast

    Thanks GM

    My photo should explain my problem ......
    A section of the drill stand is hitting on the BM housing . Im using the HG extension spreader just to get closer to the bean mass. As it is setup in the photo it is still 14 cm from end of extension to beans.
    What is not in the photo is my timber lid that covers approx 2/3rd of the opening

    I think Ill have to fabricate a longer round extension ... or score a beefier HG

    thoughts ....

    cheers
    Greg


  8. #8
    Senior Member
    Join Date
    Oct 2008
    Posts
    488

    Re: Heat Gun limits size of Corretto roast

    Greg,

    I have the same issue with you in terms of the drill stand hitting the BM housing. I have the advantage, however, of having a smaller square pan (750g load max) and a 2000W HG. I have no problems and rarely go near max on the HG.

    Ben

  9. #9
    Senior Member greenman's Avatar
    Join Date
    May 2007
    Location
    Perth, Western Australia
    Posts
    3,160

    Re: Heat Gun limits size of Corretto roast

    Hi Greg, seeing your photo and the limitation to lower the gun any further is a problem, I checked my Ryobi and its the 2000w model which has no problems with supplying sufficient heat. Apart from modding the press to go lower a 2000w hg is probably the way to go.
    As Ben stated above the 2000w gives that extra heating power!
    Happy roasting ....gm

  10. #10
    Senior Member
    Join Date
    Jan 2008
    Location
    Brisbane, Queensland, Australia, Australia
    Posts
    1,756

    Re: Heat Gun limits size of Corretto roast

    Remember that also, the extension is only that....an extension, the heat source is still the tip of the gun itself, not the extension, so you could prolly add 7 cm to the distance your heat gun is from your beans, i use a modified camera tripod that has a winder on it to adjust height during the roast, comes in handy when backing off just before FC for a slower climb to SC, it also has a range from 20cm above to 5 cm into the pan itself, not that id get it that close, the camera tripod was $10 from evilbay! beaudy!

  11. #11
    Senior Member Stan's Avatar
    Join Date
    Dec 2007
    Location
    Just North of Brisbane
    Posts
    943

    Re: Heat Gun limits size of Corretto roast

    I use a drill stand but I have attached my heat gun at a 90 deg angle using cable ties and it has been there for over 50 roasts without issue this stops the drill stand from hitting the Bread maker.

    I do not put the hot end through the drill holder as you have, but my heat gun sits across it. I will try and post photos it it is of interest to you

  12. #12
    Senior Member
    Join Date
    Jan 2009
    Posts
    264

    Re: Heat Gun limits size of Corretto roast

    Stan ....

    Quote Originally Posted by 4D6A7F701E0 link=1246245746/10#10 date=1246613819
    I will try and post photos it it is of interest to you
    Please do....

    Greg

  13. #13
    Senior Member Stan's Avatar
    Join Date
    Dec 2007
    Location
    Just North of Brisbane
    Posts
    943

    Re: Heat Gun limits size of Corretto roast

    Here they are If I do it right


  14. #14
    Senior Member
    Join Date
    Jan 2007
    Posts
    541

    Re: Heat Gun limits size of Corretto roast

    Behmor Coffee Roaster
    Those heatshield/extenders tend to lose/dissapate heat and as W Sully said you are also effectively moving the gun away from the beans by a further 7cm.

    It works best for me if the nozzle of the gun is inside the BM, but just above the top of the bowl.
    I suspect, The sides of the BM assist by reducing the cross airflow which would otherwise carry some of the the heat away from the bowl.



Similar Threads

  1. Corretto Batch Size - Heat Input Adjustments?
    By DesigningByCoffee in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 497
    Last Post: 16th September 2016, 09:43 AM
  2. Optimum Batch Size for a Corretto???
    By Dimal in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 14
    Last Post: 7th August 2008, 05:23 PM
  3. What is the normal size of your corretto roast?
    By aedion in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 22
    Last Post: 23rd November 2007, 03:18 PM
  4. size of roast effects on  Gene Cafe roast tim
    By herbie in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 7
    Last Post: 21st April 2007, 09:30 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
  •