A method for synchronized positioning of a web for manufacturing products. The method includes feeding the web into a production apparatus at a first speed； processing in the production apparatus, with the web being fed forward at a second speed； and detection of each synchronization mark for positioning the respective motif in a predetermined position on each product. The method includes the following steps: generation of a reading of the actual value of a virtual master function upon the detection, which includes a cyclic clock where the number of cycles per product includes an integer； comparison between the actual value and the expected value of the virtual master function； and stretching of the web in response to any deviation between the actual value and the expected value, with the aim of minimizing the deviation.
