Geeetech i3 to MK3S Conversion

thingiverse

###Update Fixed a tiny dimensional error on the Z Motor mounts, the gap between the centre points of motor shaft and linear rod was only 16.886mm...this has been fixed to the standard Prusa gap of 17mm. The Top mounts are unchanged as they were correctly 17mm already. Apologies, no idea how this happened but it's fixed now! #Original Description I was never really happy with the original geometry of the Geeetech i3 Pro B, especially after upgrading to a MK3 style 220x220mm heated bed because I was struggling to get the nozzle to use the full width of the bed. Even after swapping the original Geeetech MK8 extruder for a BMG clone and a V6 hotend I couldn’t get the nozzle to the edges of the bed without hitting the Lead screws. Also, I always felt the X-axis assembly had too much play in it and I felt it was preventing me getting a reliable first layer. Therefore, I designed these replacement parts so I could convert the i3 Pro B to the standard Prusa MK3S geometry. The new top mount and Z-motor housing parts move the smooth linear rods and T8 Lead screws for the Z Axis out slightly so that you can use the standard Prusa MK3S parts for the X Axis assembly. If you are brave you could cut down your original x-axis linear rods to 370mm to match the Prusa size but I ordered new ones to make sure I had the option of going back if I needed to. The main 4 parts (2x Tops & 2 x Motor housings) should fit the standard Pro B acrylic frame using the original bolts and square nuts with a few spare. They will also be much stiffer because each z-axis motor housing is now one piece rather than 3. I printed mine using ABS and a layer height of 0.2 mm but as there is very little thermal stress on these I guess PLA should work fine too. If you're using a probe as your Z endstop you can use the standard Prusa MK3S parts to make the X Axis assembly. However, I added an updated X-axis motor housing part and a microswitch mount that can be attached to the matching z-motor housing if you are planning to use the original Geeetech microswitch style endstop (note: I have not tested this myself as I'm using an inductive probe for my setup).