Remote adjustment mechanism for a combine harvester cleaning element

A method of calibrating an adjustment mechanism of a combine harvester cleaning element having a plurality of adjustable louvers carried by a frame, an adjusting bar arranged normal to the louvers and movable in a lengthwise direction of the adjusting bar, a powered actuator mounted to the frame and having a linearly movable output member fixed to the adjusting bar for moving the adjusting bar and holding the adjusting bar in a selected position whereby the louvers are set in a selected position between a fully opened position and a fully closed position, a control system including a first sensor that generates an output signal when the output member is in a home position that corresponds to a known position of the louvers and a second sensor that generates a signal corresponding to the movement of the output member, and a microprocessor receiving inputs from the sensors and sending outputs to the actuators, the calibration method comprising the steps of:

• moving the output member to the home position;
• subsequently moving the output member and measuring the movement of the output member by the signal generated by the second sensor;
• determining the position of the louvers based on the movement of the output member from the home position;
• and
• displaying the determined louver position.