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  • Pavoniboy
    replied
    Re: Virgin roaster

    Originally posted by 7F7863647F7873170 link=1244813575/21#21 date=1245122627
    As a Virgin roaster can ask just a few more questions ...please

    the graph I used as a guide seems very flat after FC ..... Is that desired
    http://coffeesnobs.com.au/YaBB.pl?num=1228795908

    Or as TG suggests a gradual rise .... so if I get a FC at 205 , and Im looking at a SC of about 220...... Should I immediately after FC start increasing temp by 3*/min , or maintain FC temp for a minute then start increasing.???
    I try to climb as slow as possible from 1st crack to 2nd crack on my corretto. 3 degrees a min is good usually, even a touch slower for me if I can manage it. As long as you dont go backwards...stalling the roast.

    Originally posted by 7F7863647F7873170 link=1244813575/21#21 date=1245122627
    Is it advisable to warm up BM bucket and HGto a temp before starting, or maybe wait till beans hit a certain temp before starting the clock...?
    I dont. I do vary my profile a bit between summer and winter to account for the different ambient temp though.

    Originally posted by 7F7863647F7873170 link=1244813575/21#21 date=1245122627
    Could a fellow roasting snob define " rolling FC " & "tipping" for me.
    Dont put too much faith in my definitions, but rolling first crack is when all the beans are really getting a move on with the crack (as opposed to 1st signs of 1st crack - the first couple of cracks) - see very technical definition - I warned you.

    Tipping is burning the tips of the bean. If you have some significant tipping you will see the ends of the bean are darker and burnt. They will also often be very cracked at the ends of the bean. A picture can help so hopefully someone will put one up. I just finished a roast, but luckily for me - no significant tipping problems.

    Have fun!

    Leave a comment:


  • hotshod
    replied
    Re: Virgin roaster

    As a Virgin roaster can ask just a few more questions ...please

    the graph I used as a guide seems very flat after FC ..... Is that desired
    http://coffeesnobs.com.au/YaBB.pl?num=1228795908

    Or as TG suggests a gradual rise .... so if I get a FC at 205 , and Im looking at a SC of about 220...... Should I immediately after FC start increasing temp by 3*/min , or maintain FC temp for a minute then start increasing.???

    Is it advisable to warm up BM bucket and HG to a temp before starting, or maybe wait till beans hit a certain temp before starting the clock...?

    Could a fellow roasting snob define " rolling FC " & "tipping" for me.

    Initially I setup with the flared end on the HG ( 1600W Ryobi) ... Droshi suggests taking the flared nozzle off, though I see others using the fared section , any thoughts on the subject ??? ( my thinking was more even heat distribution ??).

    Many Thanks


    Leave a comment:


  • Thundergod
    replied
    Re: Virgin roaster

    I aim for about 6 minutes between FC and SC trying for a gradual temperature increase.

    Leave a comment:


  • hotshod
    replied
    Re: Virgin roaster

    Got it all sorted ......

    Did a dummy run run with yesterdays disaster beans, there was no FC  but a definite SC , pulled them  cooled them and they look OK .

    Later I did 250g of Ethiopian Gambella.... that went to plan as well ,and they look and smell good. Though I fear I may have made a mistake .... I was following another Snobbers roasting guide( a bit too closely )......

    Would  I be right in saying that once you have FC , thats the temp you should hold , before moving on to SC.

    My Gambella beans FC was 203 ..... but I blindly followed the guide and went to 210  and held it there , before moving on to SC .

    Would my roast benefitted from staying at that FC temp of 203 , rather going up to 210 and holding there

    I was using pcf1978 graph guide

    http://coffeesnobs.com.au/YaBB.pl?num=1228795908

    When it all runs smoothly , it was good fun.

    GB

    Leave a comment:


  • Droshi
    replied
    Re: Virgin roaster

    Originally posted by 2E2932352E2922460 link=1244813575/13#13 date=1244981403
    Appreciate all the help here ....

    *Virgin 1st batch ..... 250g
    *External fan was at lowest setting about half a metre away
    *Heat Gun  is Ryobi  1600W ... 2 settings 600*/400*
    *Probe is about 10mm  higher than I wanted ,as element was in the way.

    Now I neeed to confirm if E:01  is a motor cutout due to heat and then disarm ....... or attack the sides and let the fan cool motor......
    I have opened up the control panel , just cant pick out  the over heat wire set up ..... Anyone !!

    Thanks
    Greg
    Most likely 250g is pretty small for your BM, but check the manual and see what its rated to bake bread, and optimum should be around 60% of that.

    Larger bean mass will help cover the probe more, and should insulate the motor from excess heat. You could also stuff some tinfoil in between the pan and the BM wall, if its crumpled a bit it should act as an insulator.

    I have a similar heat gun to you (puts out the same temps) and Ive found that a cover (metal shield from inside the BM lid) works good for me.

    I would also take off the heat gun tip, only try it out again if you really feel youre getting tipping or some other sign of uneven roast that points to the HG.


    Most importantly...did you get past 1C on your first roast? Can you chew and crunch up a bean? Or is it still nearly hard as a rock? If you got past 1C try brewing it up and seeing how it tastes, I was pretty surprised by my first "failures." Temperature profiles will help you to improve, but they also dont mean youve failed if you didnt achieve them.

    Leave a comment:


  • bassway
    replied
    Re: Virgin roaster

    Theres a quote that a guy at work always attaches to his email. I cant stand it but in this case I think that it is quite appropriate.

    "Youre on the road to success when you realize that failure is merely a detour" - WGP

    Dont worry too much about failing. My first roasts in a corretto were a disaster. Keep trying and learn from mistakes (failures is probably a better word).

    16 degrees should be fine. I have roasted when it was 4 degrees and no problem, although I do cover the pan and the heat gun is 2000W. Having said that, the heat gun is on the high setting for about 3mins out of the 16mins.

    If you know anyone that is electronically minded getting the BM bypassed (switch that turns the paddle motor on and off) would be a good idea.

    Do you have any pics? Members might be able to give better advice.

    Leave a comment:


  • hotshod
    replied
    Re: Virgin roaster

    OK guys .... really , really appreciate the help

    2nd session about to happen ...... but this time it will be a dummy run with the beans I stuffed yesterday .....

    I forgot to mention , Im using the HG extension that flares the air flow , IE it is about 75mm wide. ... Is this a good option or not important ????

    Overnite mods are ....
    *Lowered the probe , its about 1/3rd the way up the paddle height,22mm from bucket base.
    *Found heat sensor , had to leave it connected in order for BM to run , but have moved it away from bucket to the other side of the BM and have it cable tied out of the way

    Current temp is 16* .... OK
    with extremely light, very occasional drizzle, almost none ... more just dampish ..... Is that OK ???

    Cheers all

    Leave a comment:


  • Thundergod
    replied
    Re: Virgin roaster

    Originally posted by 7D7A61667D7A71150 link=1244813575/9#9 date=1244974053
    Are you guys using covers or lids on the BMs to retain heat?
    Im not.

    Originally posted by 7D7A61667D7A71150 link=1244813575/13#13 date=1244981403
    Probe is about 10mmhigher than I wanted ,as element was in the way.
    Remove the element.

    Originally posted by 7D7A61667D7A71150 link=1244813575/13#13 date=1244981403
    just cant pick out the over heat wire set up
    Mine had a sensor on the side wall of the BM that fitted into a recess with a cover over it to hold the sensor in place.
    If yours is the same youll see two wires (probably the same colour) going into the recess and back out to the circuit board.
    Just remove it from its spot and put is as far from there as the wires allow.

    Leave a comment:


  • bolb
    replied
    Re: Virgin roaster

    I would try and get the probe below the element if you can.
    Thats going to be my job next weekend, if the side of the BM has a stack of holes in it i guess its just going to add character to the whole setup.

    Mal

    Leave a comment:


  • hotshod
    replied
    Re: Virgin roaster

    Appreciate all the help here ....

    *Virgin 1st batch ..... 250g
    *External fan was at lowest setting about half a metre away
    *Heat Gun is Ryobi 1600W ... 2 settings 600*/400*
    *Probe is about 10mm higher than I wanted ,as element was in the way.

    Now I neeed to confirm if E:01 is a motor cutout due to heat and then disarm ....... or attack the sides and let the fan cool motor......
    I have opened up the control panel , just cant pick out the over heat wire set up ..... Anyone !!

    Thanks
    Greg

    Leave a comment:


  • bolb
    replied
    Re: Virgin roaster

    Hi there
    If the fan blowing across the BM can drop the temp by 10deg then perhaps you have the fan blowing to fast over the BM causing it to lift or drag the hot air out of the bread pan??
    I have a pedestal fan on one and it sits 1m away from the gun and bread pan and this is enough to cool the HG and disperse the chaff with no effect on the actual heat output of the gun itself.

    I too use the solid prob and went to try and lower the level of the prob as i think its too high but found the element of the BM gets in the way so will try and lower it a little more next weekend and then run another roast to see what happens.

    I have just moved up from doing 500gm roasts to 600gm roasts in an effort to gain bettter temperature control as i am findingn the temp will increase then drop 2deg then increase and then drop. This occurs from about 160deg through to the end of the roast at about 225deg.

    Not sure what is causing it yet hence why i increased the batch size to ensure the probe is not at the top of the bean mass.

    Mal

    Leave a comment:


  • bjeck14
    replied
    Re: Virgin roaster

    Oops,

    Missed your post re drilling breakmaker.

    However, I am not using a lid on the BM and I am easily getting to temperature with my 2000W variable temp ozito HG. It sits about 1-2cm above the BM bin and never goes above 60-70% maximum.

    Let us know how you go with the next roast!

    Cheers,
    Ben

    Leave a comment:


  • bjeck14
    replied
    Re: Virgin roaster

    Hotshod,

    Increasing your batch size can make a considerable difference. What size batch did you use?
    I have also just started coretto roasting and increasing my batch size just 100g from 300g to 400g has made a huge difference. Thermocouple placing also plays a huge part. If you are aiming for a specific curve, you could be >10degC away from where you think you are simply because the thermocouple is sitting above the bed of beans.
    18 degrees is definitely fine - I was roasting in 15degrees today and it was fine.

    Good luck with the next batch.

    Cheers,
    Ben

    Leave a comment:


  • hotshod
    replied
    Re: Virgin roaster

    Thanks for the encouragement ...

    I gave the dowel idea a miss and drilled the BM ......and stuck a solid probe in there .
    I had a fan ready to use but was struggling to reach desired heat ..... Fan when turned on would easily knock 15 + degress of the bucket temp.

    Are you guys using covers or lids on the BMs to retain heat?

    Greg

    Leave a comment:


  • Dimal
    replied
    Re: Virgin roaster

    Originally posted by 467A677C767760757D76120 link=1244813575/6#6 date=1244972259
    Mal I actually attached mine to the inside of the spoons bowl and faced the back of the spoon into the pan to shield the probe from direct heat from the gun. I figured Id get a truer, more stable reading.
    LOL.... ;D

    I use a short piece of 6mm dowel and a bulldog paper clip, didnt really think of using the spoon end... Good one mate 8-)

    Mal.

    Leave a comment:

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