Anet A8 PLUS User Manual page 43

nozzle and the four corners of the heating bed is greater than or less than 0.1mm, adjust according to step 4.
4. Adjust the distance: Fine - tuning the "distance" to make its size about 0.1mm meet the printing requirement. Move the nozzle
to the other three corners of the heating bed, and sequentially adjusting the spring compression of the four corners of the heating
bed in one direction (clockwise or counterclockwise), so that an A4 paper (about 0.1mm) can pass through this distance and feel a
slight resistance, and there is no scratch on the platform when moving the extruder.
Attention: turning the nut counterclockwise is tight
and turning the nut clockwise is loose.
The distance between the nozzle
and heating bed
spring
Nut
A4 paper can pass through the distance between the
four corners of the heating bed and nozzle, and feel
slight resistance.