Creality CR-6 SE Manual De Usuario página 33

Pulley Tightness Adjustment
Before starting up, please check the tightness of the pulley.
Z
Y
32
X
Z
Y
X/Y/Z axis pulley adjustment:
Gently dial the pulley to check whether it is idling or stuck. If this phenomenon
occurs, use an open-end wrench to adjust the hexagonal eccentric isolation
column to make it rotate smoothly.
Hexagonal eccentric isolation column