CPC B41J 2/12 (2013.01) [B41J 2/075 (2013.01); B41J 2/125 (2013.01)] | 12 Claims |
1. A method for operating a continuous inkjet (CIJ) printer with an optical monitoring means (80) having the steps
generating a bitmap (90, 180) of the printed image to be printed,
sequential controlling of charge electrodes (25) and/or deflection electrodes (30) of the CIJ printer to realize columns or lines of the bitmap (90, 190) by applying rows of ink droplets (12) arranged side by side that each form a stroke (40, 41) to a substrate to be printed (100) and to thus sequentially apply a real printed image (195) on the substrate (100),
capturing the real printed image (195) applied to the substrate (100) with the optical monitoring means (80), and
automated comparing of the bitmap (90, 190) of the desired printed image and the real printed image (195) applied to the substrate (100) and captured with the optical monitoring means (80),
characterized in that
the automated comparing of the bitmap (90, 190) of the desired printed image and the real printed image (195) applied to the substrate (100) is carried out either on the basis of rows or columns of the bitmap (90, 190) or on the basis of components of rows or columns of the bitmap (90, 190), so as to verify, after each stroke (40, 41) or during the execution of the stroke (40, 41), whether the individual ink droplets (12) or which the stroke (40, 41) consists were laced correctly after each stroke (40, 41) or during the execution of the stroke (40, 41), in order to establish whether the individual ink droplets (12) of which the stroke consists were placed correctly and reduce the number of incorrectly printed products.
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