Figure 285 - Turning and Mechanical Manipulation,
vol. 5 - The Principles and Practice of Ornamental
or Complex Turning (1884)
Epicycloidal Cutting Frames are ridiculously complex cutting frames that are basically the merger of an Eccentric Cutting Frame with a Geometric Chuck, taking them to a new level.
Epicycloidal cutting frames are typically used with for adding designs to the end of an object, especially with guilloché type of work. Also, miniature cutting heads can be used in place of the fly cutter to allow for deeper cuts (Fred Armbruster developed one).
The best reference for these is Turning and Mechanical Manipulation, vol. 5 - The Principles and Practice of Ornamental or Complex Turning (1884), but Holtzapffel also wrote this document : Notes on the Epicycloidal Cutting Frame.
On the complexity scale, they fall into:
peterwgilroy has a great snippet of one of these in action on this Instagram posting.
This one came with a box to hold all the parts !
Picture courtesy Jon Magill
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You can delay getting one of these. Frankly, unless you have the need for one, you could make a load of stuff never having one of these. But, they can be used to make some really cool stuff!
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