Hi Jim.another_jim wrote:Hi Rafael,
I'm not sure if this means the response on bean temperature is too slow for PID control. I was seeing lags of about 45 seconds and 2 minutes for a full response to pulses on the heat or fan during my dry runs This makes a ramp control a bit dicey. You might consider PIDing the MET at roughly the point where I'm measuring it. The response there is only 15 seconds lag, and one minute to a full response.
I can also run the roaster in manual mode as in the original configuration. And I don't always use the PID to control the roaster, maybe some phases. Sometimes I use the PID to get a solid drop temperature and then I turn the switch and go manual mode. I am still in the early stages of learning.
Yes, with the PID there is some lags but I can always go manual and then switch back jeje.
I was doing some Yemen beans (300 grams) and 4.5A was not enough do a smooth landing (the airplane goes down fast jeje). In my experience, when the roaster is 'heavy,' a little bit more power is needed at the end to get the same results as when it is light (200 grams).