Removing toner during printer process-control frame

A method of operating a dry electrophotographic printer to remove toner from a skive mount, comprising:

• the printer providing a rotatable development member, an end block disposed at one end of the development member, the skive mount adjacent to the development member and connected to the end block, a backup bar operative in a first position to make physical contact with at least one point on the end block, and operative in a second position to lift away from the photoreceptor, and a timing device for measuring time intervals of printer operation;
• selecting a process-control time interval;
• selecting a cleaning time interval that is a non-negative multiple of the process-control time interval;
• producing prints using the printer until the process-control time interval elapses, as measured by the timing device;
• automatically producing a process-control patch in a process-control frame;
• repeating the producing-prints and producing-patch steps until the cleaning interval has elapsed;
• and
• in the process-control frame, automatically causing the backup bar to be in the second position, then, after a selected time delay, causing the backup bar to be in the first position, so that toner is removed from the skive mount.