Position control system for an agricultural harvester reel assembly

A reel assembly for an agricultural harvester, comprising:

• an arm configured to support a reel of the reel assembly, wherein the arm has an internal passage, and the arm comprises an end cap positioned at a longitudinal end of the internal passage;
• and
• a position control system, comprising:
• a motor comprising a shaft;
• a threaded shaft non-rotatably coupled to the shaft of the motor, wherein the threaded shaft is disposed within the internal passage of the arm, the threaded shaft extends along a length of the arm, and the motor is configured to drive the threaded shaft to rotate;
• a bearing coupled to the end cap and to the threaded shaft, wherein the bearing is configured to support the threaded shaft and to enable the threaded shaft to rotate;
• and
• a carriage configured to couple to the reel, wherein the carriage is disposed within the internal passage of the arm, and the threaded shaft is configured to drive the carriage to move through the internal passage along the length of the arm in response to rotation of the threaded shaft.

A reel assembly for an agricultural harvester, comprising:

• a first arm configured to support a reel of the reel assembly, wherein the first arm has a first internal passage;
• a second arm configured to support the reel of the reel assembly, wherein the second arm has a second internal passage;
• and
• a position control system, comprising:
• a first motor comprising a first shaft;
• a second motor comprising a second shaft;
• a first driver non-rotatably coupled to the first shaft of the first motor, wherein the first driver is disposed within the first internal passage of the first arm, and the first motor is configured to drive the first driver to rotate;
• a second driver non-rotatably coupled to the second shaft of the second motor, wherein the second driver is disposed within the second internal passage of the second arm, and the second motor is configured to drive the second driver to rotate;
• a first carriage configured to couple to the reel, wherein the first carriage is disposed within the first internal passage of the first arm, and the first driver is configured to drive the first carriage to move through the first internal passage along a length of the first arm in response to rotation of the first driver;
• and
• a second carriage configured to couple to the reel, wherein the second carriage is disposed within the second internal passage of the second arm, and the second driver is configured to drive the second carriage to move through the second internal passage along a length of the second arm in response to rotation of the second driver.