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Created November 19, 2012 01:52
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bread machine coffee roaster notes
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readme.md
  • try with a 300g batch
  • heavier batch will have better thermal stability
  • making some sort of cover and exhaust will also increase thermal stability
  • thermal stability is important so the beans get evenly roasted
  • should lose 16-19% weight
  • after a couple of minutes light smoke and chaff will start coming out
  • total roast time should be between 15 - 20 minutes
  • 1st crack will be between 6 - 14 minutes
  • have the heat gun on max and raise the height by 2 or 3 cm at first crack
  • 2nd crack 5 mins after first crack
  • pull around second crack
  • lower temp at first, higher after first crack
  • for hard or high altitude beans use high setting until first crack, then go to low. For softer, lower altitude beans use the low for 5 minutes to dry them out, then go to high until first crack, then back to low.
  • You can prop the lid open to various heights to adjust the temperature without a controller.
  • get some valved bags
  • if you keep the lid on the bread machine then most of the chaff will stay in and fall underneath the heating bucket inside
  • get a fan to blow away chaff that escapes so it doesn't mess up the heat gun
  • build a cooling fan out of a bucket and an exhaust fan
  • use a food grade bucket for cooling/storing
  • figure out a way to collect/exhaust chaff
  • for shelf longevity bag should be flushed with nitrogen until the oxygen content is less than 6% and ideally 2% or less
  • use dough setting on bread machine --- after 5 minutes it goes into a continuous turn
  • bread machine can be hacked to always turn the paddle
  • it can also be hacked to not turn off at high temps (though a safety override is only on some bread machines)
  • get a large sieve from an asian supermarket

these notes are from this thread http://coffeesnobs.com.au/home-roasting-tips-tricks-ideas/26528-1st-corretto-roast-great-fun-wrng-lots-pics.html

and a cooling fan thread http://coffeesnobs.com.au/home-roasting-tips-tricks-ideas/29296-diy-bean-cooler-step-step.html

here is a manual controller http://www.harborfreight.com/router-speed-control-43060.html?utm_campaign=SEO&utm_medium=Inbound_links&utm_source=linking

or a PID controller http://www.ebay.com/itm/140755146526?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

after bread machines get boring level up to this http://www.home-barista.com/home-roasting/ultimate-home-roaster-project-t3718.html

@egonczeruk
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Not sure if it helps, but I use a shopvac and a colander to cool my beans. Just put the beans in the colander and suck the heat our from the bottom. It works so well for small batches (haven't tried anything larger than 1lb), that I haven't bothered to build a more elaborate setup. And best of all, no need to store a cooling bucket.

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