Adaptive scheduler that corrects for paper process directional arrival errors to print engine registration subsystem

A system that facilitates correcting for paper process direction arrival errors during a print job, comprising:

• a marker module that generates printed paper sheets;
• a registration subsystem comprising a plurality of sensors that detect and register sheets at one or more points along a paper path;
• and
• a scheduler that controls the marking module to apply toner to the sheets, the scheduler comprising:
• a processor that:
• receives sheet arrival time information for sheets arriving at a first registration point on the paper path over a predetermined time period;
• calculates a running average of the sheet arrival times;
• compares the average arrival time to an expected sheet arrival time for the first registration point;
• determines a registration correction factor as a function of a difference between the average arrival time and an expected sheet arrival time for the first registration point;
• adds the correction factor to an expected arrival time for a second registration point to generate an updated expected arrival time value for the second registration point;
• and
• adjusts control parameters of a marking module in the print engine according to the updated expected arrival time value.

A method of correcting for paper process direction arrival errors during a print job in a marker module of a print engine, comprising:

• determining an average arrival time for a plurality of paper sheets at a first registration point on a paper path traversed by the sheets;
• determining a registration error value by comparing the average arrival time to an expected arrival time at the first registration point;
• determining a correction factor for the registration error;
• adding the correction factor to an expected arrival time at a second registration point on the paper path to generate a corrected expected arrival time at the second registration point;
• and
• adjusting control of the marker module according to the corrected expected arrival time.