This is a continuation of an earlier thread when my ps blew. I also had to move my heated bed control to D9, which I'm guessing is the origin of my problems.
Basically, when I tell the bed to preheat it doesn't stop at the desired temperature, it just gets hotter and hotter until I unplug it. D9 was previously used for the fan, so maybe PID isnt supported on D9 and therefore it shouldn't be used?
What I did in the firmware was change the heater bed pin to 16 (D9) in pins.h. The code looks like this:
Code:
#define HEATER_BED_PIN     16
I also changed the fan pin (previously D9) to -1 which I assume means not used.
Code:
#define FAN_PIN            -1
Maybe someone who has made this change before can tell me what I've done wrong.