I've taken my Cormorant off the block and decided to make it work as a sample roaster.
First order of business is to get better control of the gas. First mod: Outboard Parker needle valve to control the gas:
Next, get good BT readings from 100g charges. I'm trying to be the least invasive as possible at first and not make irreversible mods just yet.
Second mod was to install a MCR 75mm x 2mm TC in a hole drilled through the left door socket screw and bend it to the right along the door.
I set up Artisan like this for the time being:
I played around with all manner of Artisan settings to try and get the most stable RoR traces possible. It's still a work in process, but these are two roasts from last night:
The key the the BT placement is it is not hard mounted. It is allowed to move up and down with the bean mass. Otherwise it will bind between the stirring fins and door when a beans jambs in there. I would try an RTD to get smoother curves, but the probe needs to take a sharp bend where it is currently mounted and I think I need a 2mm sheath to make the turn. I haven't found any 2mm RTDs, but I'm sure one can be made once I have proof of concept.
No ET for the moment. I cannibalized a TC trying to get something to work. I have another on the way.
One of the tricks I will need to figure out is the charge/initial heat setting to get DE at 4:00 and still have enough power to finish the roast. Right now I either get early DE or very flat BT curves.