⬢Insert LM8UU linear bearings into the printed parts (X-end-motor and X-end-idler) as shown in the picture.

⬢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 the 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.

⬢You can also check the version of the printed X-end-motor, this step is valid for B6 and higher.

⬢Please prepare following:

⬢M3nS nut (1x)

⬢M3x18 screw (1x)

⬢Insert nut and screw in the holes. For now, we need the screw just to hold in place. Tighten the screw, until its head almost reaches the surface of the printed part. We will adjust the final position later.

⬢Make sure the M3x18 screw is not visible in the marked hole (see the last picture) as it will block other screw in future step. If you can see the screw in the hole now, please release it slightly.

⬢Insert the M3nN nyloc nut in the X-end-idler.

In case you can't press the nut in, don't use excessive force. Leave the nut for now and proceed with the other components for this step.

⬢Insert the 623h bearing into the X-end idler.

⬢Secure it in place using an M3x18 screw.

Now, if needed, use the M3 screw to pull the nut in.

⬢Place your finger on the bearing and ensure it can rotate freely. If needed adjust the screw.

⬢Take remaining smooth rods and compare their length. For X-axis you need longest rods (370 mm).

⬢Linear bearing (3x)

In case you manage to push out balls from the bearings, please count them. One or two balls are ok, if there are more of them, please consider ordering new bearings.

⬢Insert the rods with bearings fully into the printed parts.

⬢Ensure the correct orientation of the parts and rods.

⬢There is a special opening in the bottom of both X-ends. Check if you pressed the smooth rod all the way in. The second (upper) rod doesn't have these openings.

⬢For the following steps, please prepare:

⬢X-axis motor (1x)

⬢GT2-16 pulley (1x)

⬢There is a flat part on the motor shaft, rotate it upwards.

⬢One of the screws must be facing directly against the pad (flat part) on the shaft. Slightly tighten both screws.

⬢Don't press the pulley against the motor. Leave a gap so the pulley can rotate freely.

Don't tighten the pulley firmly yet, we'll get to that later.

⬢Prepare M3x18 screws (3x)

⬢Prepare the motor for X-axis with an assembled pulley.

⬢Place the X-axis on the motor as shown in the picture.

⬢Insert the M3x18 screws and tighten them.

⬢X-carriage (1x)

⬢M3nS nut (5x)

⬢Zip tie (2x)

⬢Insert nuts in the traps, as in the second picture. Ensure proper alignment with Allen key.

⬢Insert zip ties in the slots as shown in the last picture.

Note: Design of your X-carriage printed part might slightly differ, but the assembly process is the same.

⬢Prepare the X-axis, align the bearings in the middle and ENSURE the label on the X-axis motor is facing up. Motor is on the right side.

⬢Lift up one side of the X-axis and slide in the X-carriage.

⬢Align bearings and tighten the zip ties. When ready, trim the zip ties using pliers.

Ensure again the correct orientation of the X-carriage.