Marlin PID Autotune Failing. After changing the hotend and heatbreak to copper and all-metal titanium, I've run the M303 PID autotune several times, but I always end up with this terrible oscillation
Bang-Bang or PID Bed Temperature Control? — CNC Kitchen
How to Calibrate Your Hot End and Heat Bed with PID Tuning – 3D Printerly
Bugfix 2.0.x] Bed Heating Fails when attempting PID Autotune · Issue #13007 · MarlinFirmware/Marlin · GitHub
3D printer PID calibration
Marlin 2.1 PID auto tune DEFAULT_bedKd value wrong on Ender 3 screen : r/3Dprinting
3D Printer PID Tuning: Simply Explained | All3DP
Marlin PID Auto-Tune: A Complete Guide - 3DprintingGeek