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Thanks for the kind words. I have a nearly finished even larger 625mm (outside height) but don't have details on the specifics of working out the height. I'll see if I can add that to the instructions. You can sort of reverse engineer them from this slide,

https://www.flickr.com/photos/d-newman/15693200543/in/album-72157647713563474/

Basically, if

  1. You do NOT mount the electronics on the underside,
  2. Do not use corner brackets above the bottom chamber plate,

then the outside vertical height boils down to

outside height = B + E + C + Zu + 75 + E
outside height = B + 2E + C + Zu + 75 mm
where

E = extrusion vertical height (e.g., 20mm for 20x20 extrusion),
B = height of bottom corner brace (e.g., 35 mm),
C = chamber plate height (e.g., 4 mm), and
Zu = length of the Z axis leadscrews above the chamber plate (e.g., 470 mm).

That 75 mm is a combination of things, some relating to component choices:

  • 19 mm inside corner brace
  • 43 mm tall flanged shaft support block for an 8mm linear rod (which this holds the center of that rod at 21.5 mm below the 19 mm tall corner brace)
  • use of the TR_Y.stl bracket on the 8 mm linear rods to support the two 8 mm linear rods for the X axis (http://www.thingiverse.com/thing:252041/#files)
  • use of the XY extruder carriage of this bot and direct drive extruder with the particular height it holds the nozzle above the print surface

Note you can go higher and be okay: if the extruder nozzle is too high above the build plate, then you just lower the flanged shaft support blocks thus lowering the Y axis linear rods and thus lowering the X axis linear rods and the extruder carriage.

Core XY cube
by Unknown