Nomad 3 jammed on Z axis

[flynnjs (Jason)]

Maintaining Nomad 3

I help support the Nomad in our public technology library; done so for the past eight years. Currently the library is using a Nomad 3. I am looking for insight on two recent observations: A brass colored ring, surrounding the bitsetter, appears to move upward over time. I had not noticed this before and have pressed it down several times until it is again level with the aluminum floor of the Nomad. Is there some cleaning or maintenance that should be done to prevent this or is this a normal …