Craig, A hot air roast should take much less than 30 minutes. It was cool this morning and I roasted two batches, both to medium City Roast (just past the end of the first crack), and each was less than 6 minutes. I am using a vintage unit but have had similar performance from other devices. It sounds like your old air-popper may have had a temperature limit that kept it from getting hot enough. I did have one popper model that I had to hack into and bypass the low-temperature thermostat (but it still seemed to roast slow and did not last as long a unmodified units). In an air popper the roast should happen so quickly that it is easy to keep an eye on it.
I put some notes about my current roasting/cooling setup into a blog post. My controls over the roaster are adjusting the recirculation of heat to increase the temperature of the air going into the popper and controlling the ventilation with a bilge blower. I think the photos show most of the details. I hope it makes sense. Ping me if you have any questions. http://fettricks.blogspot.com/2018/10/roasting-coffee-with-hot-air-poppcorn.html Shane On Wed, Oct 24, 2018 at 7:53 PM Craig Cook via TriEmbed < [email protected]> wrote: > I have been using this > https://smile.amazon.com/gp/product/B00XK3ALS0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 > for the last 8 years roasting green beans. > > That has the side vents, takes ~30 mins to roast. Works *really* well. I > burned the motor out 2 weeks ago. It's discontinued. Thought I should > migrate to an arduino based version, hence my questions and asking for > advice on what parts I should purchase. > > Yes, after the roast I dump the beans into a cooling basket. > > I have one of these to replace it: > https://www.gopresto.com/product/presto-poplite-hot-air-corn-popper-04820 > https://smile.amazon.com/gp/product/B00006IUWA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 > > Given that new information, would it change the proposed design? > > It will be much better if I can control the roasting process though. > Without control I get a few over roasted beans. > > Thanks for everyone's help. > > Craig > _______________________________________________ > Triangle, NC Embedded Computing mailing list > > To post message: [email protected] > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > TriEmbed web site: http://TriEmbed.org > To unsubscribe, click link and send a blank message: mailto: > [email protected]?subject=unsubscribe > >
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