This is one of the carriages I'm preparing for my "Euroreprap Railroad System" collection, so it's compatible with other vehicles marked as "ERS".
This model is a complete set of parts - even a wheels' axles are 3D printed (1.75mm filament pieces are used for hinges' axles).
To learn about the assembly please take a look at this PDF instruction:
The carriage is compatible with LEGO tracks (adequate distance between gauge lines) and its native tracks standard: "Euroreprap Railroad System" (free inter-connector track model is available).
No support is needed during printing
Printers with small bed sizes will do fine (for bed areas below 15x15 cm please contact me first to obtain adequate files set on order)
No special tools are needed during assembly (I use metal nail file for finishing places where excessive material remained)
The model's dimensions after assembly are: 270x80x125 mm (10.63x3.15x4.92 in)
If you like to experiment with this model on other track scales, the factors to match them are:
x0,847 for 32 mm track (scale "0")
x1.19 for 45 mm track (scale "G") - please note that after this scaling the minimal bed size will be 18x18 cm
(scaling factors may slightly differ depending on each printer accuracy level)
Various "LEGO type" tracks are available freely for download & printing nowadays.. e.g. here: http://www.thingiverse.com/thing:26734
Design Programs: Rhino, Sculptris, MeshMixer, OpenSCAD, Blender, Inkscape, MeshLab, Photoshop
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