Prusa i3 MK3 126% build volume (26,5 cm build height) + easily exchangeable extruder head!

thingiverse

Hi! Update -> Easily Swappable Extruder Mod https://www.thingiverse.com/thing:3023998 Update -> Even more height? Over 200% build height! (Easily Swappable Extruder Mod required) (link not added yet) This mod increases the build height of the Original Prusa i3 Mk3, based on the appropriate mod for the Mk2. No real need to click the link: https://shop.prusa3d.com/forum/improvements-archive--f85/30-more-build-volume-26-cm-build-height-working-t6088.html. Before you read on: This mod is a significant modification of the original MK3. Make sure you have some basic skills in building/rebuilding the MK3 and also considering electronics ("just" soldering or crimping) and that you can modify the firmware ("just" one codeline). You need: From this Thing: - Essential: All printable parts just like they are downloaded. Additional parts required: - Essential: 2x 8mm rods with 38cm length or more - Essential: Some cables and, optional, a connector (or a multiple ones) with at least 22 lines in total. With the essential parts and some skills in soldering (lengthen the cables), you will be able to increase the build height up to 265 mm - to the whole upper end of the frame's inner side! HOW TO BUILD: 1. Print all the parts of this mod. 2. Take the whole z-gantry, x-gantry and the extruder apart. 3. Rebuild the x-gantry with the new parts (x-end-idler, x-end-motor, x-carriage). You need to grind down the trapezoidal nut so that it does not exceed the part but merges to one flat surface on the side (see the quattro photo collection). 4. Rebuild the z-gantry with the new parts (z-axis-top). 5. Rebuild the extruder with the new parts and the new cable management (extruder-body, extruder-cover, filament-sensor-cover, extruder-body-shoes). 6. Cut the cables of the extruder quite close to the connectors. Make extension cables with the connectors. 7. Your choice: Solder the cables back together or build (solder) a connector in between. I chose a car-connector. You may want to design a specific holder depending on your connector or you use the generic solution provided by me, based on the pcb box v2 of MMU1.0. You need to guide the cables up in front of the frame, over it, like shown in the pictures. 8. Update firmware to a max z height of 265 (mm). You may use the hex-file I provided, but no guarantees it will work on your printer properly, especially with other mods installed. 9. Literally plug in the extruder and print! TODO: - Better extruder cable management CURRENT PROBLEMS: - Nothing serious. For more details please see the forum post on Prusa Research: https://shop.prusa3d.com/forum/user-mods-octoprint-enclosures-nozzles--f65/126-build-volume-26-5-cm-build-height-easily-excha-t19412.html