Tunnel portal
Description
Hi everyone. I've returned to my old time hobby and found a great synergy between H0 railway modelling and 3D printing. Recently I have started to build a layout. I could not find a tunnel portal, that suits my needs. So I have decided to make my own. Portal walls are covered by large stones. This is a single track version, sized to be used with Roco Geoline track system. Hight is enough to let electric loco to pass through with open pantograph. Model has a stand and tunnel walls going 3 cm inside. No support is required. However, concrete beam at the top sticks out about 2 mm from the wall. My printer handled that well. Only few dropped strings, which I cleaned up. Alternatively use support. Later I will add dual track portal as well as portal with a brick walls. Printer settings are unique for each printer and filament. I have printed it with ABS. My settings are: 3 perimeters, 3 bottom and 3 top layers 50% infill 25 mm/s speed 240 C extruder 100 C bed (PEI sheet) Enjoy!
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