# Calibrate PID Settings

This section explains how to calibrate the Proportional, Integral, and Derivative (PID) for the Extruder and Heater Bed. I am using a target temperature of 200C for the Extruder and 60C for the Heater Bed as I only print with PLA filament and those are the temperatures I set to print with.

If you use a mixture of filaments like PLA/PETG etc., you may want to use the average temperatures between the two (If you print with PLA at 200/60 and PETG at 240/70 you could PID calibrate with an average of 220/65 etc.).

* PID Calibrate Extruder:
  * From the MainsailOS web interface;
  * Send a <mark style="color:red;">`PID_CALIBRATE HEATER=extruder TARGET=200`</mark> command in the <mark style="color:red;">`Console`</mark>;
  * Watch the <mark style="color:red;">`Temperature`</mark> chart and you will see that the <mark style="color:red;">`Extruder`</mark> is heated to 200C and cooled a series of times;

![PID Extruder](/files/1AvxV7tgUqUHBIDuJqBP)

* At the completion of the calibration, the PID parameters for your printer will be displayed in the <mark style="color:red;">`Console`</mark> area;
* Send a <mark style="color:red;">`SAVE_CONFIG`</mark> command in the <mark style="color:red;">`Console`</mark>;
  * This will update the <mark style="color:red;">`printer.cfg`</mark> file with the new PID settings and restart Klipper;

![SAVE\_CONFIG](/files/rOHrDhgCXeTQIsoCVIRX)

* PID Calibrate Heater Bed:
  * From the MainsailOS web interface;
  * Send a <mark style="color:red;">`PID_CALIBRATE HEATER=heater_bed TARGET=60`</mark> command in the <mark style="color:red;">`Console`</mark>;
  * Watch the <mark style="color:red;">`Temperature`</mark> chart and you will see that the <mark style="color:red;">`Heater Bed`</mark> is heated to 60C and cooled a series of times;

![PID Heater Bed](/files/kjWUmtAyPleqAzJJdHkx)

* At the completion of the calibration, the PID parameters for your printer will be displayed in the <mark style="color:red;">`Console`</mark> area;
* Send a <mark style="color:red;">`SAVE_CONFIG`</mark> command in the <mark style="color:red;">`Console`</mark>;
  * This will update the <mark style="color:red;">`printer.cfg`</mark> file with the new PID settings and restart Klipper;

![SAVE\_CONFIG](/files/AXqFKa73ZRQclxe7yh7I)

* Checking the <mark style="color:red;">`printer.cfg`</mark> file to ensure the new PID settings are updated:
  * From the MainsailOS web interface, click <mark style="color:red;">`Machine`</mark>, then click on <mark style="color:red;">`printer.cfg`</mark>;

{% hint style="info" %}
As you continue to fine tune your printer settings, every time you send a <mark style="color:red;">`SAVE_CONFIG`</mark> command in the <mark style="color:red;">`Console`</mark>, it will make a backup copy of your current <mark style="color:red;">`printer.cfg`</mark> file (adding a date/time).

You may have to click on page 2 in the <mark style="color:red;">`Machine`</mark> menu to find your <mark style="color:red;">`printer.cfg`</mark> file, as the backup take up space on page 1.
{% endhint %}

![Machine > printer.cfg](/files/HADqqW7oy4ABCX5yEdmL)

* The <mark style="color:red;">`printer.cfg`</mark> file should load into an editor window;

{% hint style="info" %}
You should not be making any changes at this point, we are just confirming that the PID tuning settings have been updated;
{% endhint %}

![printer.cfg](/files/Rf7qbRn8LgbRDlCskUWs)

* Scroll down in the <mark style="color:red;">`printer.cfg`</mark> file until you get to the sections <mark style="color:red;">`[extruder]`</mark> and <mark style="color:red;">`[heater_bed]`</mark>;
  * You will notice that the previous default PID settings have been commented out and will not be used;

![Old PID Settings](/files/UcZHsfhv3e4ErBTV8FMh)

* Continue scrolling down to the very bottom of the <mark style="color:red;">`printer.cfg`</mark> file until you reach the;
  * <mark style="color:red;">`#*# <---------------------- SAVE_CONFIG ---------------------->`</mark> section;
  * A new <mark style="color:red;">`[extruder]`</mark> and <mark style="color:red;">`[heater bed]`</mark> section should be present, along with their corresponding calibrated PID values;

{% hint style="info" %}
Any of the settings added to the <mark style="color:red;">`printer.cfg`</mark> file in the <mark style="color:red;">`SAVE_CONFIG`</mark> section will automatically load when Klipper is started.  You do not have to edit or touch the settings in this area.  If you ever re-do a PID calibration or any of the calibrations, the values will be updated in this section.
{% endhint %}

![Extruder and Heater Bed PID Tuning Values](/files/KkCZziNLRUaQGb4ZDaMl)

* Once you have confirmed these settings;
  * Close the <mark style="color:red;">`printer.cfg`</mark> file by clicking the <mark style="color:red;">`X`</mark> near the top right of editor;


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