I have a Mypin PID that reads the correct temperature, turns the SSR on, but does not auto tune. The post simply keeps heating until temps are much higher than the target temperature - (ie. set for 670 F the pot will simply keep heating until 800F or more.)
Any one have some suggested values for " P ", " I ", and " D " settings
I have used the REX C100 with no problems - the Mypin is beginning to be a little challenging.