Creality Ender 3 Pro Assembly Instructions V1.0
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4.2
Secure the stepper motor into place with the 2x M4x18P hex
socket countersunk screws and tightened into place using
the M2.5 hex key (Allen key). These screws are feed through
two holes on either side of the plastic mounting block
attached to the top of the stepper motor and screwed into
the matching threaded holes in the (15) Z-axis vertical profile
(left).
4.3
Insert the (17) Z-axis lead screw into the Z-axis shaft coupling
on top of the (08) Z-axis stepper motor.
4.4
Slightly torque the grub screws using an M2.5 hex key (Allen
key) enough so the lead screw is held in place. At this point
in the assembly process do not tighten too much as we will
need to set the final position of this screw in a later step
(step 9.3).