Various embodiments include a system having a pipetting chamber, a set of pipettor cartridges docked in the pipetting chamber, a gantry system mounted on a ceiling within the pipetting chamber, the gantry system including at least one stationary track aligned in a first direction, and a movable track aligned in a second direction distinct from the first direction, the movable track coupled to the at least one stationary track, and a carrier configured to transport each of the set of pipettor cartridges to a pipetting location within the pipetting chamber, the carrier configured to move each pipettor cartridge in a third direction perpendicular to both the first and second directions.