Patent ID: 8311463

Claim:
A method for reducing high-frequency banding in an electrophotographic development station having a rotating shell and a rotating magnetic core, comprising: subtracting a first angular position of a spot on a dielectric support member (DSM) in a nip region of the DSM after a first number of pole flips from a second angular position of the spot on the DSM after a second number of pole flips to determine a change in angular position; subtracting a first time for the first number of pole flips from a second time for the second number of pole flips to determine a change in time; dividing the change in angular position by the change in time to determine an effective angular velocity of the spot on the DSM in the nip region of the DSM; dividing the effective angular velocity of a spot on a dielectric support member (DSM) in a nip region of the DSM by an angular velocity of the rotating shell to determine a banding reduction ratio; and adjusting a rotating speed of the rotating shell relative to a rotating speed of the rotating magnetic core such that the banding reduction ratio is not a ratio of differing low whole numbers.