Maker Select Plus PID Tuning with OctoPrint

What you’ll need

• Maker Select Plus
• OctoPrint

What’s PID tuning?

Improving the printer’s temperature control.

Why?

New hot end, age, etc. Printer doesn’t seem to be able to hold a consistent temperature while printing.

Original Values

These were the original PID values on my Maker Select Plus. You can retrieve these values from the display on the printer.

PID-P: 33
PID-I: 1
PID-D: 189

Tuning

1. Open OctoPrint
2. Go to the Terminal tab
3. Check all of the Suppress message checkboxes
4. Enter M303 E0 S230 C10 to start autotuning
   M303 — Command to tune
   E0 — Tune the extruder (E1 is the heated bed)
   S230 — Target temperature
   C10 — Number of iterations
   WARNING: The output in OctoPrint will be pushed out of the buffer by the suppressed messages, so don’t leave it for a long time.
5. Wait until it’s finished. Here’s the output once it’s done.

Recv: Kp: 20.12
Recv: Ki: 1.23
Recv: Kd: 82.41
Recv: PID Autotune finished! Put the Kp, Ki and Kd constants into Configuration.h

New Values

Here’s the values that I got after tuning my printer with the Micro Swiss All Metal Hotend.

Values have been rounded to the nearest whole number.

PID-P: 20
PID-I: 1
PID-D: 82

Enter your values into the printer using the built-in display or use the commands below in the OctoPrint terminal.

M301 P20.12 I1.23 D82.41
M500

• M301 — Command to set PID values
• P20.12 — Your Kp value
• I1.23 — Your Ki value
• D82.41 — Your Kd value
• M500 — Command to save settings

To view your current settings use M503.

Sources

• https://oxi.ch/2017/03/28/prusa-i3-and-all-marlin-based-3d-printers-pid-tuning-with-octoprint-slic3r-and-simplify3d/