The hot end and the heated bed will both have a temperature sensor that the firmware uses to keep temperatures at least in the ballpark. Depending on the controller it might just do on-and-off bang-bang control or it might do something as sophisticated as PID control.
In order to provide a more relevant experience for you, we use cookies to enable some website functionality. Some of the cookies are used for statistical purposes while others are set up by third party services.
By clicking "Allow", you accept the use of all the cookies on the platform. Click "Decline Non Essential" to select only strictly necessary, or "Preferences" to make more detailed choices.