Date/Time: 3/5/18 3:30pm
Equipment: Middle top Ultimaker 2+ extended
Collaborators: Jake Lee, Albert Tai
Images album: https://imgur.com/a/DKmT6
x-crossbar was askew, not perpendicular to the y-crossbar. This causes wear and tear on the bearings and belts, and results in askew prints.
See: Figure 3
The right slider moves via a geared belt on two pullies on the top right and bottom right corners. Release these two pullies from their axles by loosening the set-screw on the pullies. The x-crossbar should return to its correct perpendicular state by tension alone. Re-tighten the set screws and confirm that the x-crossbar is now perpendicular to the y-crossbar by visual inspection.