How does a Temperature PID Controller work?Īs in any PID control first, we need to be aware of the output or what we want the controller to do, for this project we want to maintain a certain temperature of the heating element (we will set that temperature with the help of the rotary encoder) so to maintain the temperature we need to read out of the temperature, for that we are using a K-type thermocouple, in conjunction with MAX6675 Cold-Junction-Compensated K-Thermocouple to Digital Converter IC that can measure hundreds of degree Celsius without any issues. And then it tries to deliver the required power to ensure the target temperature remains constant, this not only reduces environmental impact but it also reduces overshoots that can be found in the traditional on-off control mechanism. The PID temperature control works using a mathematical formula to calculate the difference between the current temperature and setpoint. What is a Temperature PID Controller ?Īs the name suggests a temperature PID controller deals with temperature, PID temperature control is a closed-loop control algorithm that improves the accuracy of the process. In one of our previous articles, we made a PID controller based self-balancing robot and an Encoder Motor Control with PID you can check those out if you want to learn more about the topic. In this article we decided to make a PID Controller based Heater that can be used to control the temperature of the hot end of the 3D printer or by slightly modifying the device it can control the temperature of a DC Soldering Iron very efficiently, and a little more tweak and you can control a TRIAC and that can control the RPM of an AC motor or an AC heating element the possibilities are limitless with PID control.
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