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Motorized, Articulated T Rex(ish) Pin Walker

"It don't mean a thing if it ain't got that swing (Doo wah, doo wah, doo wah, doo wah, doo wah, doo wah...)" Sorry, an old song (Duke Ellington, 1943) came to mind while designing this model...

Anyway, "Motorized, Articulated T Rex(ish) Pin Walker" is yet another pin walker design, this time featuring an articulated T Rex styled body that swings from side to side as the model walks along. And while paleontologists around the world will tell you this model does not accurately represent the walking motion of a T Rex, I'm old enough to have actually seen one, and yes it does..., uhh, ok, well no I'm not and no it doesn't, but it was fun designing this model anyway.

The model is designed to swing the articulated T Rex body ("Body.stl") at +- 8 degrees with a rotational a velocity sufficient enough to cause full swing articulation of the 3D printed in place body.

And if you have followed my pin walker designs, you know they were all inspired by the talented works of RobotHut ( and of rick100 (

As usual, I probably forgot a file or two or who knows what else, so if you have any questions, please do not hesitate to ask as I do make plenty of mistakes.

Designed using Autodesk Fusion 360, sliced using Cura 4.3.0, and printed in PLA on an Ultimaker 2+ Extended, an Ultimaker 3 Extended, and an Ultimaker S5.

One final note, I receive no compensation in any form for the design, equipment, parts and/or materials used in this model.

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