Discuss roast levels and profiles for espresso, equipment for roasting coffee.
I'm interested a lot!
My thoughts are that a variation of the existing Catuai application is the most straightforward way to test things on the Quest. Hardware needed (most of which you probably have already):
- Arduino and TC4 (version 5.20 is ideal, but this should also work on older TC4's with a software setting)
- Two 10K, 1-turn potentiometers to manually control the power to the heater and the fan (only required for Catuai; would not be needed once switched to Artisan)
- One zero cross SSR for the heater
- One random fire SSR for the fan (Crydom D2425-10, Crouzet 84137200 or equivalent)
- Zero cross detection board (I would send you a prototype)
Assuming everything works with Catuai, then I would tweak aArtisan (the TC4/arduino software for Artisan interface) specifically for the Quest and you could switch to Artisan if you wanted.
Great Jim! I'll email you about it!
And don't worry about TMI, not too much info at all! I'm just kind of slow on this subject as I'm a software guy!
- Team HB
Im neither a software guy, nor a hardware guy, but I find it all quite fascinating, even though, for the most part, I deep in the weeds.
I thought I had read somewhere in another post that rotational speed control of the drum was also desirable modification for some. I thinks it's a compliment to the designer of our roaster that a simple manual roaster can be modified in so many ways to automate many aspects of the roast.
As far as I know, the new Quest M3 has control of the drum speed. I don't know if it's a different motor, but the original one could be controlled by the same way Jim describe here, I just don't know if it can rotate at a higher speed than it rotates now...
- Team HB
I have the latest version offered by Sweet Marias. It has controls for amperage and fan speed only. I have heard dealing with the company directly can provide different options. But to add on the import duties, and extremely high shipping costs made little sense, since I was able to drive over to SM's in 20 minutes and pick it up.