Handler; Field-Replaceable Units (Frus) - Qualstar RLS-8350 Technical & Service Manual

2.3.2 Handler

Figure 2-6 shows the major components of the RLS cartridge handler. The library uti-
lizes a four-axis robotic cartridge handling system that moves cartridges between the
storage slots and the tape drives. All axes are driven by brushless DC motors. The
motors move the linear axes with precision lead screws driven by timing belts. Feed-
back is provided by hall effect sensors with optical end-of-travel sensing. Cartridge
gripping is accomplished using a solenoid for simplicity and dependability. The linear
axes are riding on linear bearings, and the rotating axis is supported on ball bearings.
The entire robotic handler is a removable as a single unit through the front panel,
without removing the library from the equipment rack.
Figure 2-6 RLS Handler (RLS-85XX shown)

2.3.3 Field-Replaceable Units (FRUs)

Many of the library's major components are available separately as Field-Replaceable
Units (FRUs). Sometimes referred to as spare parts. These components can be re-
moved and replaced in the field by qualified personnel. See Chapter 7 for a complete
list of FRUs, their part numbers and removal/replacement instructions.
Some FRUs can be added to a unit as an expansion item. The instructions for in-
stalling an expansion FRU are contained in Chapter 7.
2-8 Description and Theory of Operation
511010 Rev. 07-01-19