Going from a finished print to a great print takes a lot of calibration steps. Besides having the heatbed leveled correctly, and the extruder perfectly calibrated to melt just enough filament, the temperature of the hotend and the heatbed is just as important. Today i am going to show you how to perform a PID Tuning to have constant and accurate temperatures during your prints.
Jul 09, 2019 I have a anet a8 i just put together so im kind of new to this, but i ordered and installed a auto level i tried skynet and had no luck with the bed being center it was printing in the back right side of the printer. Now i installed marlin and it.
What is PID Tuning?
Before starting with the guide on how to do a PID tuning, we fist need to understand the concept. In just a few words, PID is an algorithm that makes sure the heaters for both hotend and heatbed supply just enough heat in order to have the difference between the highest and lowest temperature as small as possible. If you are interested in learning more about what is PID, you can check this Wikipedia article where a PID controller is described
Prerequisites for 3D Printer PID Calibration
In order to perform a successful 3D printer PID tuning, you need to have the 3D printer connected to your computer via USB. Next, you need to access the terminal for your printer firmware. Today i will use Pronterface but anything will do, as long as you are able to send G-Code commands to the printer.
Hotend PID Tuning
Now that we have the 3D Printer connected to the computer, we can start the Hotend PID Calibration.
The message “PID Autotune start” will appear in the terminal. Your hotend will start to gradually heat and get new readings.
Hotend PID Tuning Pronterface
While the hotend PID Calibration is underway, let’s understand the command we ran.
M303 – This command initiates a process of heating and cooling to determine the proper PID values for the specified hotend or the heated bed.E0 – This argument selects the extruder we want to calibrate. I have only one extruder, so i will set it to 0.S215 – This argument sets the temperature for the extruder PID Calibration to 215C.C8 – This argument sets the number of cycles we want to run. I selected 8 because it’s the recommended value in Marlin firmware, but any value from 3 to 10 is great.
When the message “PID Autotune Finished” is displayed in the terminal window, the hotend PID Tuning is complete.
You will also see new Kp, Ki and Kd constants that need to be saved so let’s do that now. The previous values were so we need to adapt the command with the new values and save them.
Save new Hotend PID settings
Heatbed PID Tuning
If you managed to perform the hotend calibration, then the heatbed PID Calibration will be much easier.
The message “PID Autotune start” will appear in the terminal. Your heatbed will start to gradually heat and get new readings. While the heatbed PID calibration is underway, let’s understand the command we ran.
M303 – This command initiates a process of heating and cooling to determine the proper PID values for the specified hotend or the heated bed.E-1 – This argument selects the heatbed we want to calibrate. I have only one heatbed, so i will set it to 1.S60 – This argument sets the temperature for the heatbed PID Calibration to 60C.C8 – This argument sets the number of cycles we want to run. I selected 8 because it’s the recommended value in Marlin firmware, but any value from 3 to 10 is great.When the message “PID Autotune Finished” is displayed in the terminal window, the hotend PID Tuning is complete.
You will also see new Kp, Ki and Kd constants that need to be saved so let’s do that now. The previous values were so we need to adapt the command with the new values and save them.
More information about PID Tuning can be found on the RepRap wiki
Hello,I am changing the printbed and silicon heater for my Taz5, but first I want to learn something about PID settings. After watching Toms video '3D printing guides - Using Marlin's PID autotune', I have run through the routine several times and for two different temperatures. The values I get are so inconsistent that I am wondering if the PID-autotune can be trusted? These are the values i get after running the PID-autotune for the bed 4 times with: M303 E-1 C10 S60 ![]() Run 1: Kp: 342.25/Ki: 52.92/Kd: 553.37 Run 2: Kp: 968.09/Ki: 172.49/Kd: 1358.36 Run 3: Kp: 161.85/Ki: 17.39/Kd: 376.55 Auto Tune Heated Bed Marlins 2017Run 4: Kp: 383.62/Ki: 68.87/Kd: 534.25Auto Tune Heated Bed Marlins ClubThe values in run 3 is close to the default values in Configuration.h (162/17/378). This is to random for me to trust, and I feel the right ting is to stick to the default values. Can anyone tell me if you use PID-autotune and how you choose your PID values? Auto Tune Heated Bed Marlins For SaleAuto Tune Heated Bed Marlins ReviewsRegards RobertComments are closed.
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