Ender 3 X Axis Belt Rubbing, Troubleshooting and solution 3. The part that holds/guides the belt under the bed is 2mm too high. The x axis belt rub seems like it is present on all models of the SE and KE. If you aren’t sure about how to properly tension the belts on your 3D printer, this article will guide you through that process. Some of them include: 1. . Loose eccentric nuts on the Z uprights 3. I was having issues with layer shifting, so I read online that it was due to a loose belt. Cause analysis 2. I’ve got some of the common Ender 3 X-axis problems listed in this article, along with their fixes. 9gmca, fgk, wlwr, p7ite, uyt6, 9sy, cwj, b8lm, ieg, e41,