Agilent InfinityLab LC Series Vialsamplers User Manual 23
1Introduction
Operating Principle
Needle Parkstation
The needle parkstation comprises two main assemblies: needle drive and wash
port.
Figure 8Needle Station
Needle-Drive
The needle movement is driven by a stepper motor connected to the spindle
assembly by a toothed belt. The circular motion of the motor is converted to
linear motion by the drive nut on the spindle assembly. The upper and lower
needle positions are detected by reflection sensors on the needle station board,
while the needle-in-vial position is determined by counting the motor steps from
the upper needle-sensor position.
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