It is a moving epicyclic gear train, printed in one go – so gaps have to be fairly accurate. It stays together – and would have to be broken to get it apart – because the gears are all double-helical types (actually herringbone gears) – and I thank Wise Mr Kurt of this parish for ...
This story continues at 3D printing: a moving object in one go
Or just read more coverage at Electronics Weekly
from Electronics Weekly https://www.electronicsweekly.com/blogs/engineer-in-wonderland/3d-printing-moving-object-one-go-2019-03/
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