3D Printing Calibration - Marlin

Teaching Tech (Youtube: Link) has a great resources on his github/web page for Marlin or older bed slingers running on Marlin. If you have any suggestion, please submit to his github issues on their gitub : Submit Issue

Calibration Guide: https://teachingtechyt.github.io/calibration.html

Above Guide Include the following calibration with visual supporting videos:

Frame Check 

PID Auto Tune 

Extruder E-steps Calibration 

First Layer

Slicer Flow Calibration

Stepper Motor Driver Current

Temperature Tuning

Retractions Tuning

Acceleration Tuning

Linear Advance

XYZ step calibration

Speed Tuning

If you're running klipper and looking for more advance tuning, you can have look at below Ellis helpful print tuning guide. 

Klipper Advance Calibration Guide: https://ellis3dp.com/Print-Tuning-Guide/