3D Printing, Programming

Today’s Functional Print: Train Valve Gear

In today’s “how did I ever live without a 3D printer” news, I’ve saved a decades-old toy train from the trash heap by printing a new valve gear for its left side of its wheels. The train is a 1986 model New Bright toy train, and it was destined to encircle our Christmas tree, but a missing piece was causing the front left wheel to get lifted off the track by a dragging piston rod. It took about half an hour to design a replacement in OpenSCAD and an hour to print. Its value is immeasurable.

Here’s the component by itself.

wheel-bracket

And here it is in place:

train-engine

You might not be able to pinpoint it, since it fits so perfectly that it’s undetectable as an aftermarket add-on. Here’s a closeup:

wheel-bracket-in-place

The OpenSCAD script and STL file are available on GitHub.

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