HYSTERESIS COMPENSATION SYSTEM

摘要

A system and method for compensating for hysteresis in laboratory liquid handling apparatus The system comprises a carriage (30) holding a drive gear (40) that meshes with and drives a gear rack (20). A hysteresis brake (50) is also provided on the carriage (30) and opposes the movement of the drive gear (40) to provide continued positive engagement of the drive gear (40) with the gear rack (20) even when the system is static. When the direction of travel of the gear rack (20) is reversed, the drive gear (40) rotates an additional distance that compensates for the aggregate hysteresis found in the drive train.