A fluid delivery system (100) includes a pump (224) operably coupleable to a source of fluid (256). A reciprocating electromagnetic actuator (222) is coupled to the pump (224) and has a coil (220) that when energized causes the actuator (222) to drive the pump (224). Coil current sensing circuitry (332) is configured to provide an indication of current flowing in the coil (220). A controller (330) is coupled to the coil current sensing circuitry (332) and is configured to calculate a coil drive parameter based upon a plurality of coil current indications from the coil current sensing circuitry (332). Coil drive circuitry is coupled to the controller (330) and is configured to supply current to the coil (220) based on the coil drive parameter.
