Prusa i3 MK2-X

MK2-X is implementation of most of Original Prusa i3 MK2 mechanical and electrical components into metal frame from RebeliX project. The goals are:

• Significantly more rigid frame, which can be assembled easily and precisely.
• Reuse as many original parts as possible, especially all X-carriage assembly with extruder.
• Make basic parameters easily adjustable.

Frame is built from AL profiles 30x30mm (slot width 8mm), frame couplers and steel Y-rods are original from RebeliX project. Frame dimensions are 360x380x390mm (WxDxH). Y-rods are 360mm long. Profile lengths:
X: 360mm (3x)
Y: 320mm (2x)
Z: 330mm (2x)

Linear bearings for Y-carriage are replaced by their longer version LM8LUU. You can also use two LM8UU in row instead of one LM8LUU. You can even use only one LM8UU, in that case put it in center of bearing housing. But with longer bearings the bed is significantly more stable and rigid.
Top end of Z lead screws is secured in 8x22x7 bearings.
You will need some M6 screws and nuts to build the frame and mount printed parts onto it, and some M2,5 screws, M3 screws and self-locking nuts to mount MK2 equipment.

X-home position as well as geometry of Y-carriage can be adjusted by moving Y-rods.
Y-home position can be adjusted by M2,5 screw in Y-belt-holder under the bed.
Y-belt is tightened by simple belt tightener implemented in Y-idler (M2,5 screws).

See also http://www.thingiverse.com/thing:1898131 - modifications made for Igus RJMP-01-08 linear bearings.

Important notice:
Parts not listed here (for example whole X axis) are supposed to be taken from your original Mk2 printer without any modifications. If you are building the printer from scratch, you will have to get those parts source files from Prusa's github yourself.