Inkjet Printer Sub-Scanning Correction for Non-Integer Passes

The patent changes the parameter representation from discrete correction values for each pass number to continuous correction coefficients (α and β) that work with any pass number. The correction amount is calculated as: correction = α × pass_number + β, where α and β are determined through calibration. This allows the system to handle sophisticated print settings including non-integer pass numbers without requiring pre-prepared correction data for each possible value.

The patent creates a universal correction mechanism using coefficients α and β that can correct sub-scanning movement errors for any pass number value, whether integer or non-integer. Instead of having separate correction parameters for each pass number type, the system uses a single pair of coefficients that universally applies to all printing conditions, making the correction system as versatile as the printing options themselves.

The patent performs preliminary calibration to determine the correction coefficients α and β once, storing them in the system. During actual printing operations, the system automatically calculates the correction amount using these pre-determined coefficients and the current pass number, eliminating the need for operators to manually adjust correction parameters for each print condition. This preliminary action ensures high correction accuracy while maintaining ease of operation.