4682 - Accessor Y motion could not find a hard stop while moving down

The Y motor on the robotic accessor could not find a hard stop while moving down. This could be caused by damaged Y gears, a faulty Y motor or drive electronics on the robotic accessor. This fix procedure describes how to diagnose and correct this issue.

Fix procedure

  1. Put the library in Service Mode:
    1. From the management GUI., go to Actions > Change Library State.
    2. Choose In Service Mode (Offline) option and then click the Set button.
  2. Open the front door.
  3. Clear away any obstacles in the way of the robotic accessor such as a cartridge sticking out of a cell. If a cartridge is sticking out of a cell push it back in.
    Additional Troubleshooting:
    1. If a cartridge is stuck between the gripper and a library slot, follow the Removing a stuck cartridge from gripper procedure.
    2. Check and remove any debris in the Y-rail gear rack such as a piece of plastic.
    3. Check and remove any other debris which would interfere with accessor motion.
    4. Verify the Y end stop is not damaged (end stop bent). If damaged go to Contact IBM support.
  4. Close the front door and set the library online:
    1. From the management GUI., go to Actions > Change Library State.
    2. Choose Online option and then click the Set button.
  5. If the problem is resolved you are finished.
  6. If the problem persists put the library back in service mode (See Step 1) and replace the robotic accessor:
    1. Replace the robotic accessor using the Robotic Accessor videos.
    2. Reset the LCC. From the management GUI, go to Library > Nodes Cards. Right click on the LCC node card and choose Reset This process will log you out of the GUI..
    3. Close the front door and calibrate the library. From the management GUI, go to Actions > Calibrate Library and click Yes.
    4. Put the library online. From the management GUI., go to Actions > Change Library State and choose Online option.
    5. Run Library Verify. From the management GUI, go to Actions > Library Verify keep the default options and click Next
  7. If the problem persists, contact IBM support.
Attention: If the problem has occurred multiple times and still not resolved, contact IBM support.

Damaged Components
During the procedure, if any part is found physically damaged, replace the applicable Customer Replacement Unit (CRU). See Customer service procedures.