⬢Insert linear bearings into the printed parts (X-end-motor and X-end-idler) as shown in the picture. Make sure the first bearing in each printed part is pushed all the way down.
DON'T TRY TO PUSH the bearings from the other side. There is a rim (smaller diameter of the hole).
⬢First pair of bearings should be in line with the top surface on both X-ends.
⬢Second pair of bearings should be seated on the rim (close to the lower surface) on both X-ends.
You can press the bearings against a flat surface for easier insertion.
Place two bearings in a way that the inner balls of the second bearing are rotated 45° compared to the first. This way you will achieve greater contact with the smooth rod. See the third picture for more details.
⬢Insert the M3x30 screw. For now, we need the screw just to hold in place. Do not tighten the screw fully. Leave a 2 mm (0.079 inch) gap between the screw head and the plastic part. We will adjust the final position later.
⬢Checked everything? It's time for: 4. Z-axis assembly.
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