Bambu Lab A1 mini Gantry Cover with Ball Bearing

This model enhances the already excellent A1 mini 3D printer.

The original gantry cover is replaced with a ball-bearing version.

The bearing used has a 10mm inner diameter and a 15mm outer diameter. Bearing width 4mm.

This supports the spindle rod in the upper area.

I printed all parts using ASA. This explains the different scaling in the print file.

No supports are needed; they are integrated into the model and can be broken out after printing is complete.

Short instructions:

• Print parts
• Remove the original cover (including the gray plate screwed onto the gantry)
• Break the supports out of the cover (I added pauses in the G-code to mark the supports with a permanent marker. This serves as an adhesion promoter for the supports - but it should also work without the permanent marker)
• Press the bearing into the cover (I worked with 0.95 flow with the ASA - if you have different values or the filament is generally not calibrated, the fit of the bearing will probably not be correct)
• Attach the cover and tighten the front (black screw) first, then the silver ones from above. All original screws are reused here.
• Now screw the printed screw onto the spindle from above through the cover (hold the print head - if necessary, push it up to the cover. This finally centers the spindle in the bearing. The distance between the printed screw and the surface of the cover should then be at least 3.01mm.)
• Attach the last top cover. (If this does not fit completely, the plastic screw is not screwed on properly!)
• Finished 

For those who do not want to use a bearing, a version without a ball bearing has been placed on the 2nd print bed.

This should work for quite some time with ASA. However, I can imagine that the material will wear down due to the spindle.