What Could Be Causing This Issue

[WillAdams (William Adams (Carbide 3D))]

I guess running out of travel would count as mechanical interference.

Check the positioning/adjustment of the X-axis homing switch.

Consider calibrating for Belt Stretch:

Calibrating the machines over long distances

The typical technique for machine calibration: depends on precision measuring tools, and is limited by the reach of the tools in question. EDIT: It also depends on access to the MDI — if using Carbide Motion v6 it will be necessary to enable this in Settings | Options: [image] It should be possible to cut strips from a suitable blank of material, one along each axis — so we set up a square file which matches an available blank of material: [image] and put in suitable geometry and assig…

which two efforts should prevent this.