Step 3
Select from the touch screen in the previous step ①
“
Back
”→
②
“Leveling”→ ③“Point 1”.
When the nozzle moves to the "first point" position(as shown
below ), and user put a piece of A4 paper under the nozzle. Twisting the
hand screw nut to make the nozzle just contact with the A4 paper and
that the A4 paper can move smoothly with slight friction.