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Alliance iS HPLC Systems User Guide
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Alliance iS HPLC Systems User Guide
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Sample manager features

Needle positioning mechanism

Needle positioning mechanism
Topic LCI-USG-0014, Last Updated 11/08/2024

A dual-axes needle positioning mechanism draws the samples from the vials in the sample plates that the sample manager will inject onto a chromatographic column.

To line up the needle with the vials in the wells of the sample plates inside the sample compartment, the needle positioning mechanism’s two rotary axes control the orientation of the sample plates and the relative position of the sample needle carriage. Both rotary axes rotate a shaft using a belt and motor. The needle carriage rotates approximately 90° away from the inject port while the sample plates are on a continuous 360° rotary axis.

Figure 1: Needle positioning mechanism’s dual-rotary axes, located below the sample compartment
Platter rotary axis
Belt
Motor axis
Figure 2: Needle carriage's rotary axis, located inside the sample compartment
Needle carriage
Needle cartridge
Needle carriage rotary axis

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