HP Scitex LX850 HP Scitex LX850 & LX820 Printers: Maintenance and troubles - Page 86
Printing double-sided does not respect the left edge position selected, The two sides of a double- - latex ink printer
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Printing double-sided does not respect the left edge position selected When defining the double-sided printing job, an option called Substrate edge detection option is selected. With this option, the printer will automatically read the right edge position and will correct the position of the plot to minimize registration errors. Double-sided printing The two sides of a double-sided job are not the same size The high temperatures used to cure the latex ink could produce thermal contraction in some substrates, resulting in size mismatches between side A and side B of a double-sided print job. To solve this issue we suggest the following procedure: 1. Print side A, then measure the print dimensions and calculate the proportional correction to be applied to compensate for the substrate contraction. Length correction = (expected length - measured length) / expected length Width correction = (expected width - measured width) / expected width NOTE: Be careful not to confuse side A with side B, and not to apply the width correction to the length or the length correction to the width. 2. Reprint side A with length and width corrections; the printer will accept differences up to 10% between sides A and B. 3. When side A has been reprinted, print side B with its original dimensions, and using the same printing parameters that were used for side A (print mode, temperatures, airflow, and so on). With this procedure, the size differences between side A and side B should be minimal. NOTE: If any substrate advance correction factor is applied, it could affect the length along the substrate axis, so we recommend including the substrate advance correction in your analysis. 80 Chapter 8 Troubleshoot double-sided printing ENWW