Wrist lock for a storage library

Abstract

Systems and methods are described for fixed rotational positioning of a robotic hand assembly using mechanical wrist locking techniques. A wrist is configured to rotate the hand assembly and point grip components in a desired direction (e.g., for pick and place operations). Tolerances of components of the wrist can accumulate to manifest rotational positioning error. Embodiments include wrist locking techniques for locking the wrist in a desired rotational position. Some implementations couple grip components with wrist lock components in such a way that movement of the grip components causes the wrist lock assembly automatically to move between locked and unlocked states. For example, retracting the grip components pushes a wrist lock latch into an unlocked position (allowing the wrist to rotate). Extending the grip components allows the latch to move to a locked position where it interlocks with an alignment feature to lock the wrist into an accurate, predetermined angle.