A method of controlling a system comprising an arrangement of at least two nozzles, wherein said arrangement and a surface of an object move relative to each other, each nozzle traces a respective path on the surface of the object, and each nozzle is configured to jet drops at actual jetting locations along the respective path of said nozzle, the method comprising the steps of: defining, for each path traced by a nozzle, a plurality of target jetting locations regularly spaced by a target pitch; determining the maximum velocity any nozzle from said arrangement reaches along the respective path of said nozzle during the relative movement wherein the relative velocities are different for different nozzles of the at least two nozzles; defining an error distance associated with each target jetting location to be the distance between the said target jetting location and an actual jetting location which is closest to said target jetting location; setting a maximum value for the error distance, wherein the maximum value is greater than zero; providing a first control signal comprising a sequence of actuation events for said arrangement, wherein said first control signal is common to all nozzles in said arrangement, wherein the sequence of actuation events corresponds to a sequence of potential jetting locations for each nozzle along the path traced by said nozzle, wherein the actuation events are provided at a regular interval, said interval being chosen so that a maximum distance between consecutive potential jetting locations for all nozzles is limited to twice the maximum value for the error distance in the actual jetting location, wherein the maximum distance is the said interval multiplied by said maximum velocity; for each nozzle, choosing a subset of the potential jetting locations which is the set of actual jetting locations for said nozzle wherein for each target jetting location of that nozzle there is an actual jetting location in said set that is closer to said target jetting location than the maximum value for the error distance; and determining, for each actuation event in the sequence of actuation events, the subset of nozzles from the arrangement wherein each nozzle is at an actual jetting location from the set of actual jetting locations for said nozzle. defining, for each path traced by a nozzle, a plurality of target jetting locations regularly spaced by a target pitch; determining the maximum velocity any nozzle from said arrangement reaches along the respective path of said nozzle during the relative movement wherein the relative velocities are different for different nozzles of the at least two nozzles; defining an error distance associated with each target jetting location to be the distance between the said target jetting location and an actual jetting location which is closest to said target jetting location; setting a maximum value for the error distance, wherein the maximum value is greater than zero; providing a first control signal comprising a sequence of actuation events for said arrangement, wherein said first control signal is common to all nozzles in said arrangement, wherein the sequence of actuation events corresponds to a sequence of potential jetting locations for each nozzle along the path traced by said nozzle, wherein the actuation events are provided at a regular interval, said interval being chosen so that a maximum distance between consecutive potential jetting locations for all nozzles is limited to twice the maximum value for the error distance in the actual jetting location, wherein the maximum distance is the said interval multiplied by said maximum velocity; for each nozzle, choosing a subset of the potential jetting locations which is the set of actual jetting locations for said nozzle wherein for each target jetting location of that nozzle there is an actual jetting location in said set that is closer to said target jetting location than the maximum value for the error distance; and determining, for each actuation event in the sequence of actuation events, the subset of nozzles from the arrangement wherein each nozzle is at an actual jetting location from the set of actual jetting locations for said nozzle.