Stator Magnet Assembly for Compact Pipetting Drive

The patent transitions from guiding pipetting units on separate parallel rails (1D separation) to guiding them on the same rail with alternating sides (2D separation). The guidance carriage can move between two sides of the rail, allowing units to pass each other laterally without collision while maintaining close axial spacing. This dimensional change enables higher density arrangement while preserving reliability.

The patent merges multiple guidance functions into a single shared guidance rail structure. Instead of requiring separate parallel rails for each pipetting unit, a single rail serves multiple units that alternate sides. The guidance carriage integrates lateral movement capability, combining axial guidance and lateral positioning functions into one system, thereby reducing installation space while maintaining collision prevention.

The patent implements a universal stator magnet arrangement that serves multiple pipetting units simultaneously. A single stator magnet arrangement positioned at the rail can interact with rotor magnet arrangements on either side of the rail, enabling one stator to drive multiple rotors. This multi-functional design reduces the number of stator assemblies needed while maintaining independent control capability for each pipetting unit through selective rotor energization.

The patent applies local quality by making the magnetic field interaction selective and localized. Each rotor magnet arrangement is independently energized only when its corresponding pipetting unit requires drive force. The stator magnet arrangement generates magnetic fields that are locally coupled to active rotors through controlled electromagnetic interaction. This selective activation minimizes magnetic field interference between adjacent units while maintaining close proximity, as inactive rotors do not generate interfering fields.