This repository contains the CAD data used to manufacture the prototype of the Cryptex Programmable Memory Mechanism.The Cryptex Programmable Memory Mechanism (CPMM) is fully-mechanical Follow-the-Leader controller for tendon-driven, flexible catheters.Basic functionThe system contains a series of memory rings that can slide on a splined shaft. By rotating the shaft, an agular position is chosen for the rings. A second, fixed shaft is apposed axially to the first. The memory rings can be translated on to the fixed shaft one by one each with an arbitrary position, allowing the user to program a path to be followed.Concentric to the fixed shaft is a set of 15 reading rings. As the memory rings are translated on to the fixed shaft, they pass through the reading rings.The reading and memory rings are connected via a compliant H-beam that is located in the annular space between the two sets of rings. Bearings in the …