Adjusting PID Parameters for Best Temperature Management

jackzz

Hello Everyone ,

I upgraded the printer to the Duet 2 WiFi card recently, and I'm very new to the field of 3D printing. Although Duet3D's features and community support have greatly impressed me, I've run across a small problem that I'm hoping some of you may assist me with.

I'm having trouble getting the best temperature control by fine-tuning the PID parameters on my heated bed and hotend. I've tried the auto-tune tool and read through a number of tutorials, but my outcomes are still erratic.

Here's a quick summary of my setup & the actions I've already taken:

Configuring a printer:

Model of printer: Ender 3 Pro Duet 2 WiFi, with firmware 3.4.0
Hotend: 0.4 mm nozzle E3D V6
Bed: Regular glass-plated heated bed

Actions Undertaken:

Executed the M303 command to auto-tune the bed and hotend.
Enter the PID values that were obtained by running the M307 command.
Carried out several prints to verify that the temperatures were stable.

Problems Experienced:

During prints, the hotend temperature varies by +/- 2°C, which results in slight variations in print quality.
The temperature of the bed is comparatively constant, but it takes a while to attain the desired temperature.
Every now and then, I have temperature issues that cause the print to pause; I have to reset and restart.

I also followed this: www.reddit.com/r/ControlTheory/comments/o1g6xg/any_tips_to_tune_a_pid_temperature_mlops _controller/

I would be very grateful for any guidance on the following:

Are there any particular options or factors that I could be missing that could aid in regulating the temperature of the hotend?
Advice on how to heat the bed more quickly and steadily.
General best practices that may not be included in the usual guidelines for Duet 2 WiFi PID tuning.

I've received so much encouragement from this group, and I can't wait to absorb your combined wisdom. Thank you in advance.

jay_s_uk

@jackzz did you auto tune the hotend as a heater or as a tool? if you're unsure, post the M303 command you've been using

droftarts

@jackzz said in Adjusting PID Parameters for Best Temperature Management:

Duet 2 WiFi, with firmware 3.4.0

Update your firmware, too. Latest: https://github.com/Duet3D/RepRapFirmware/releases/latest

Ian