Hewlett-packard Development Company, L.P.

Kang Leng Tan

Tong Nam Samuel Low

Peow Ng

Zixing Yao

Andy/Prima Kencana

Chin Hung Koh

Examples relating to calibrating printing pens of a print bead assembly in a printer are described. For example, techniques for calibrating a printing pen includes detecting position of a first symbol and a second symbol of a pattern from amongst multiple patterns in an alignment pattern, where each pattern is associated with art ideal deviation and the symbols are printed in a juxtaposed position. The ideal deviation is a predefined value of deviation between the symbols when the printing pen is aligned. Thereafter, determining an actual deviation, due to misalignment in the printing pen, between the symbols. Further the technique includes establishing a relation between the actual deviation and the ideal deviation for the multiple patterns and determining a value of the ideal deviation for a zero value of the actual deviation. The value of the ideal deviation is a corrective value of alignment for the printing pen.

Calibrating printing pens of print head assemblies

A printer is operated to determine an attribute of a field of view of the scan sensor. A calibration test pattern is determined based on the field of view (e.g., size of the field of view relative to dimension of individual bar in pattern).

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Singapore, Singapore

Kang Leng Tan