Rumba it consists of a printing bed on 3 Z screw raisers that work indipendently not only to find the perfect bed alignment with the nozzle each print automatically, but also to tilt the print up to 40 degrees in any direction helping thus with printing without supports if you manage to get your hands or make your own non planar slicer.  This adds 2 more axis to your printer making it a 5 axis non planar capable machine for cheap (such machines costs thousands of dollars just for the add ons in the industryes that need them like CNC milling etc) powered by 3 closed loop stepper motors to create te Z, U and V axis.

This set of STL files is for the 200x200mm printing bed.  It can tightly accomodate up to 300300 mm printing beds too.

You will need to build a frame using 8 20X20 aluminium profile lenghts cut at preciselly 420mm ech and four 20X20 aluminium lenghts cut at preciselly 390mm each.

With the long profiles you will make two frames (for top and bottom) using the other 4 lenghts as vertical frame legs. On two (paralel on top of eachoter) lenghts of 420 that are at the longer distance for the opposite ones (your top and bottom frames will be not equal squared each but rectangular) at the dead center place a sliding rod fixer on each profile perfectly alligned with eachother, place in a rod from top to bottom, take you pre cleansed and fitted togenther Rumba platform and slide in the centering rod bearing tube of the central aligner  onto the rod than  slide the rod down into the lower clamp and fix it for good.

Now you can place the opposite two aligning clamps on the bottom opposite profile accoridng to the Rumba platform, (leave enough room between them for the access to the motor support bolts to work with) put the Rumba other two centering rod bearing tube aligners on top of the clamps, slide in two rods, slide on them on top the counterparts clamps and lock them on the top profile.

Now you can fit the motor supports and motors, their threaded lifting Z axis studs and brass nuts, and your Rumba is ready ro the first testings once hooked into the motherboard.

From here on is ordinary administration, placing the end stop click switches (3 on the bottom level of each rod centering bearing, other 3 at the top end, one inside each alignment mechanism of the Rumba paltform underneath by the central gear to prevent the excess resulting in pulling of the alignment rods to snap them, total 9 switches)

On top we reccomend to run a Core XY or similar gantry system for the X and Y axis with a top down mini Z auxiliary axis that holds the printing head.