ReDuplicator i3 MK3x - MK52 Removable Heatbed Expansion

thingiverse

This is a documentation of the installation process for an MK52 expansion on a 3D printer, specifically the ReDuplicator-MK2sx model. The document provides detailed instructions and images to guide the user through the assembly and installation of various components. Here's a breakdown of the content: 1. **X Gantry Assembly**: The X gantry is assembled using M3 nylocks and screws to clamp the idler and motor to the z bearings. 2. **Idler Tensioner System**: An improved tensioner system is introduced, which includes two heatserts in the rear of the tensioner part. Two 20mm M3 screws are required to clamp the X idler and tensioner together. 3. **Z Rods Assembly**: The Z rods are assembled with a distance of 396mm between them. The Z rod top holding pieces should be flush with the edge and top of the tower extrusions, and should fit snugly. 4. **Y Bearing Assembly**: The bearings are inserted into the Y bearing holders using M3 nylocks and secured to the Y carriage with 22mm-25mm M3 bolts and washers. 5. **Y Belt Tensioner**: A new belt tensioner is introduced, which requires two m3 nylocks to be press fit into it. The belt is mounted by looping it around a 12mm M3 screw and tightening it with a 35mm M3 screw. 6. **Heatbed Installation**: The MK52 heatbed can be installed using countersunk 12mm screws and nylock nuts for precise leveling. 7. **Soldering the Heatbed**: The heatbed must be soldered to be low profile enough that it doesn't collide with the hotend cooling system. 8. **Heatbed Cover Installation**: The heatbed cover is installed using fasteners provided with the heatbed. The document concludes with a changelog, which indicates that this is version 1.1 of the documentation, and includes major updates to improve X gantry rigidity, introduce a new X tensioner, and improve Z rod top and motor mounts. Overall, this document provides detailed instructions and images to guide users through the assembly and installation of various components on an MK52 expansion for a ReDuplicator-MK2sx 3D printer.