A processing machine can include motors; at least one heater; first and second processing enclosures separated by a gap; an upper level conveyor that passes circuit assemblies through the first and second processing enclosures and the gap; a lower level conveyor that passes the circuit assemblies through the first and second processing enclosures and the gap; an elevator that transports the circuit assemblies between the upper level conveyor and the lower level conveyor; and a controller that includes circuitry operatively coupled to the motors and to the at least one heater.