Dynamic balance correction station for a disc drive

An automated balance correction station configured to install a balance correction member on a disc pack of a disc drive, the balance correction member comprising a c-shaped ring with a substantially elliptical shape formed from a wire having a selected length and a nominally uniform cross-sectional area, the balance correction member configured for retention in a corresponding annular recess in the disc pack, the balance correction station comprising:

• a frame;
• a lift and balance measure assembly supported by the frame which measures rotational imbalance of the disc pack;
• a lift and locate assembly supported by the frame and configured to position the disc pack for receipt of the balance correction member;
• and
• a balance correct assembly supported by the frame and configured to release a balance correction member in response to the measured rotational imbalance, compress the balance correction member to a substantially circular shape, and place the compressed balance correction member adjacent the disc pack so that the compressed balance correction member expands and compressingly engages the annular recess in the disc pack.