Mini Mill End Stops

thingiverse

These three parts serve as mounts for Makerbot mechanical endstops (or compatible clones) to a Harbor Freight (Sieg X2 class) mini mill. The Z axis bolts directly into the screw hole on top of the column. The Y axis bolts securely to my custom-made Y axis conversion, available here: https://www.thingiverse.com/thing:2591938 . To mount the X axis, simply remove the handle end of the mill and slide it onto the dovetail, taking note that this modification reduces your X travel by 20mm. These parts were designed to be temporary solutions, but they can get you up and running quickly. I plan to replace them with metallic parts in the future and optimize limit switch locations for maximum travel. If you experience flaky behavior or unpredictable issues, it's likely due to RFI problems caused by unshielded stepper cables. My own setup worked smoothly until I tried to enable hard limits, which became a frustrating challenge.