Ways to Add a Dual Z Axis - Including G34 Auto Z Levelling

Explore three methods for adding a dual Z axis to an Ender 3 3D printer in this comprehensive video tutorial. Learn how to achieve a level gantry using a mechanical belt-driven kit, adding a second stepper motor in parallel, and implementing a firmware-controlled stepper with G34 auto Z levelling. Discover the pros and cons of each approach, including PSU relocation, alignment techniques, and firmware modifications. Follow step-by-step instructions for installation, wiring, and configuration, with insights on reducing Z banding and optimizing print quality. Gain valuable knowledge on G34 behavior, slicer start gcode changes, and advanced firmware settings to enhance your 3D printing experience.

Introduction
Identifying the problem
Overview of the the three methods
Ender 3 PSU relocation
Option 1: Mechanical - belt driven leadscrew
Alignment
Option 2: 2nd stepper motor in parallel
Flexible coupler to remove Z banding
Option 3: 2nd stepper motor with G34 auto alignment
G34 minimum firmware changes
G34 default behaviour
G34 slicer start gcode change
G34 advanced firmware changes
Conclusion - You on Kazoo!