Fig. 2
From: Material characterization and selection for 3D-printed spine models
Setup of six-degrees-of-freedom machine. Similar to the freebody diagram in Fig. 4, the specimen is clamped in a cup within the bottom motor while the bur is attached to the top motor, sweeping in an arc motion across the top of the specimen. The motors are controlled pneumatically through a pressure system within the building. The increased pressure allows for various complex motions within the six-degrees-of-freedom (3 modes of translation, 3 modes of rotation), all with the capability of moving in sync with each other. Load cells, with a sensitivity of 0.01 N and max load of 10 kN, are located near both the top and bottom motors