PID Tune your 3D Printer with Marlin Firmware

    3D PrintersPID Tune your 3D Printer with Marlin Firmware

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    PID Tune to your hotend will result in better quality prints so it’s worth the time to learn how to do it. It’s not that hard at all.

    If you haven’t installed the Marlin Firmware on your 3D Printers Mainboard or don’t know what Marlin is check out my article; Beginner Guide to Marlin 1.1 3D Printer Firmware before trying this tutorial.

    What is PID Tuning

    Well, in short, PID Tuning ensures your HotEnd or Heated Bed stays at your desired temperature setting.

    I’ll save you from the technical information and we’ll keep this guide simple and for beginners.

    OK, I’m ready to go what do I need?

    We’ll be using Octoprint for this demonstration, but you can also use any slicer that has a terminal command window and is connected to your printer.

    Pronterface a.k.a PrintRun is a free slicer that you can also use for this process.

    Note: Some Mainboards do not support PID Tune Commands

    Step 1 – PID Tune to your filament temp

    You should already have an idea of what type of filament you want to tune on and what the optimal temperature you print it at.

    In this example, we will tune for standard PLA Filament at 200°C

    Keep in mind you will want to PID Tune to different target temps based on what filament you will run in your 3D Printer.

    Step 2 – Current Settings

    First, get a baseline on what your 3D Printer is currently tuned at.

    Open up your command terminal window in your slicer and connect to your 3D Printer.

    Once connected enter the following command to see what your current PID Tune settings are: M503

    You’ll see a section PID Settings with a P, I and D set of values: M301 PXX.XX IX.XX DXX.XX

    PID Tune Values
    Example of M503 output (Your values will be different)

    Write these down for safekeeping in case you need to revert back.

    Step 3 – Start the PID Tune command

    To start the auto PID Tune command enter M303 E0 S200 C3 where S= Target Temp.

    Here is an explanation of the command: [M= Pid command E= Extruder S= Target Temp C= Cycles]

    In this example, we will tune to 200 degrees for PLA Filament <M303 E0 S200 C3>

    Here you can see what this process looks like;

    Step 4 – Enter the new PID Tune values

    So we started with M301 P22.20 I1.08 D114.00

    and our new values are; Kp 40.63 Ki 5.98 Kd 69.06

    This makes the new code to enter in the command line: M301 P40.63 I5.98 D69.06

    One received then enter M500 to save the new values to the eeprom.

    Enter M503 again to verify the new values are saved.

    That’s it you have now completed a PID Tune on your 3d printer.