Fig. 6
From: Innovative inverse kinematics algorithm for 6-DOF robotic manipulators with offset wrists

Schematic of the overall robotic arm with three adjacent intersecting rotational axes at the end-effector.
From: Innovative inverse kinematics algorithm for 6-DOF robotic manipulators with offset wrists
Schematic of the overall robotic arm with three adjacent intersecting rotational axes at the end-effector.