Videos: Curve Controlled Roasts with FZ-94 and Artisan

See also: http://kostverlorenvaart.blogspot.nl/2016/08/complete-curve-controlled-coffee-roast.html

The video below may be a little boring for some because I did not cut footage from it to skip any part that may be uneventful. Do slide back and forth at will to see / ignore any part you want.

FZ-94 (2) – Pushing the Drum Heat Limit Controller

That third MaxWell MTA-48 temperature PID, all the way to the right on the front of the FZ-94, plays a dual role. Besides reporting the actual temperature of the roasting drum, it is wired to control the heaters based on the set temperature limit.

FZ-94 (1) – Bumping up MODBUS

In this first post on an improved FZ-94 setup for Artisan v1.0 we are focusing on the communication between the machine and the software. MODBUS RTU speed in Artisan prior to v1.0 was limited by an issue in an underlying library. That resulted in each request/replay pair to take at least the amount specified by the serial timeout parameter, which defaults to one second.