Printer Edge Detection via Calculated Margins

The patent applies preliminary action by calculating the front edge margin and tail edge margin in advance based on the recording data and carriage movement amount. This allows the system to determine the optimal conveying distance before actual printing begins, eliminating the need for slow preliminary carriage positioning and low-speed conveyance for detection. The front edge detection is achieved through calculation rather than physical repositioning, thus maintaining high printing speed while ensuring accurate front edge positioning.

The patent replaces the mechanical repositioning system with a calculation-based system. Instead of physically moving the carriage to the center position and using sensors to detect the front edge, the system calculates the front edge margin based on the recording data and carriage movement characteristics. This substitution of mechanical detection with computational calculation eliminates the time-consuming mechanical repositioning operations while maintaining accurate front edge detection.

The patent applies parameter changes by transforming the detection approach from physical parameter measurement (sensor detection during slow conveyance) to calculated parameter determination (computing front edge margin from recording data). By changing the fundamental parameter from conveyance speed to calculation precision, the system achieves accurate front edge detection without being constrained by slow conveyance requirements, thereby maintaining high printing efficiency.