Propulsion decoupling method and system for multiple track mounted robots of an automated storage library

An automated storage library system for the storage and retrieval of media cartridges, the storage library comprising:

• a plurality of media cartridge storage cells each housing a respective media cartridge;
• tracks disposed adjacent to the media cartridge storage cells for enabling access to each of the media cartridge storage cells;
• a first robotic mechanism operable to move on the tracks to access the media cartridges in the media cartridge storage cells, the first robotic mechanism having a plurality of drive wheels operable to ride on the tracks for moving the first robotic mechanism along the tracks, a drive mechanism for driving the drive wheels to move the first robotic mechanism along the tracks, and a clutch mechanism actuable for disconnecting the drive mechanism from the drive wheels when the drive mechanism is disabled to enable the first robotic mechanism to be moved along the tracks by an external force after the drive mechanism has been disconnected from the drive wheels, wherein the clutch mechanism includes a clutch actuation lever slidable to a disengaged position to disconnect the drive mechanism from the drive wheels;
• and
• a second robotic mechanism operable to move on the tracks, wherein the second robotic mechanism actuates the clutching mechanism by engaging the clutch actuation lever.