90 ton 1/14 metal excavator scratch build w/embedded PC

[SteinHDan]

I experimented a bit to figure out the smallest mesh size I could print without supports on my 3D printer. On the original, the meshes in the doors and in the platform look like this:






I can't make that fine lines easily, so I made the meshes a bit coarser. On the platform it's supposed to be two rows of six holes, but on this model it is two rows of three.

At a distance it all looks quite similar, though.

The mesh lines are 0.8mm thick This is because the print head nozzle is 0.4mm wide and I need two lines beside each other to print the mesh nicely without supports on my machine. The layer height is 0.2mm and thus there are 4 layers in the vertical direction to make up the 0.8mm mesh line size.

Also, the mesh had to be coarse enough to allow air to flow through, as the air is needed for the cooling of the motor controllers on the inside.

Detail images:






The parts:

Counterweight:




Doors:




Smoker air intake and smoker exhaust:




Lid and temporary hinge pin mechanism:




Tanks:




Steps:
(this is printed in yellow and then painted partially black afterwards)