Prusa MINI Z-Axis Brace for MGN12 Rails

prusaprinters

This is a remix of the Prusa MINI Z-Axis Brace by Brolin Workshop with clearance for MGN12C blocks that I re-created from scratch for using with the Y-Axis Linear Rails Mod. It is inspired by a similar remix by Ryper3D.The following things are different:Clearance for an MGN12C or MGN12H blockA guide that slides into the Z extrusion to ensure perfect vertical alignment of the braceReinforced full-infill screw holes that withstand compressionMore Prusa-like design by using big 4mm chamfers and 70-degree small chamfers instead of rounded corners and edgesSTEP file available for easy remixingPro tip: To make installation easier with the bed still attached, remove the flex plate first. Then tilt the display out of the way and install the bracket loosely (just enough so you can still slide it around but as snug as possible) on the Y extrusion first, somewhere close to the display. Then slide it into position and loosely install it on the Z extrusion. Then fully tighten it on the Y extrusion using a ball-end allen key while lightly pressing it against the Z extrusion. Then fully tighten it on the Z extrusion.When installed incorrectly, this bracket could tilt your Z-axis towards the front so it's important to first install it loosely so that it can still move a little and fully tighten all the screws afterwards.BOMQtyDescriptionSourcing4M5x12mm Button Head Cap ScrewAliexpress, eBay4M5 Drop-In T-Nut for 3030 Extrusions, Slot Type 8Aliexpress4M5 10mm OD 1mm thickness nylon washer (optional)eBayPrinting4 Perimeters30 - 40% infill5 top and 5 bottom solid layersPETG or betterSTL is pre-rotatedKey FeaturesAssemblyInstall the M5x12mm screws, optional washers, and T-Nuts loosely on the Z-BraceInsert the Z-axis alignment guide into the T-slot of the Z extrusionSlide the brace down until it makes contact with the Y extrusionWhile keeping the brace aligned, tighten the M5 screws connected to the Z extrusionTighten the remaining M5 screws on the Y extrusion