A print engine for drop-on-demand printing having a removable drive electronics unit and a removable ink jetting structure. The ink jetting structure may include an actuator mechanism, a nozzle, and a flexible circuit. The drive electronics unit may include an input port, at least one driver chip, and an outlet port. The inlet port may receive electronic data from an external information source and convert the received electronic data into electronic signals used to activate the actuator mechanism. The output port of the drive electronics and the flexible circuit may be removably connected through the use of an electronics connection device. This connection may allow the electronic signals generated by the drive electronics unit to be delivered to the actuator mechanism. These signals may control when the actuator mechanism is activated, thereby controlling the formation and jettison of ink droplets out of the nozzle of the ink jetting structure.