Pxmalion Core i3 Y axis linear rail upgrade parts

thingiverse

This is what I did to upgrade my Pxmalion Core i3's y-axis rails and bearings with fully supported rails on my Pxmalion Core i3. I've had this printer for three years and decided to completely redo the y-axis, resulting in much greater rigidity, much easier belt tension adjustment, and simplified 3-point bed leveling. I upgraded the y-axis linear rails and bearing from 8mm to 12mm fully supported rails and 12mm linear bearings. This upgrade requires parts made from aluminum plate and various aluminum 90-degree angle; it's not entirely 3D printable. The minimum recommended tools are an angle grinder with a cutoff wheel, hand drill, drill bits for tapping and clearance holes for M3-M5 sizes. Numerous other upgrades have been performed to make this possible, including replacing the plastic front and back frame members with 2040 aluminum extrusion to mount the rails, new y-axis motor mount, and adjustable y-axis idler pulley too. The entire Y-axis carriage is replaced with 3/16-inch thick 5-by-10 inch aluminum plate with mounting holes for the bearing holders. Also, the Y-axis belt mount has been redesigned to accommodate the added height of the y-axis carriage and rails. This requires the Z-axis home switch to be mounted higher up (done with 20mm aluminum angle bolted to the frame upright). About 10-15mm of Z height will be taken up to accommodate the taller linear rails depending on what bearings, and what bed surface is used. For my scenario, I choose to use the original 2040 extrusion running parallel to the Y-axis as the new front and back frame members and use two new 50 cm lengths of 2040 for the members parallel to the y-axis.