Error Recovery Scenarios for Dual-Gripper Pickers in Libraries
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31
Many of today's library systems have dual-gripper pickers which allow the autochanger to exchange cartridges at a location in a library. This results in higher pick performance than using individual move commands. In most cases, when one of the two grippers fail, the autochanger reports a hard failure and the library stops operating even though the second gripper may still be usable. And, since there are usually more failure points in a dual-gripper picker than in a single-gripper picker, this can result in a dual-gripper picker being less reliable than a single-gripper picker. What is needed is to maintain the performance benefits of a dual-gripper picker while improving the reliability to be equal to or better than the reliability/availability of a single-gripper picker mechanism.