Method for monitoring a post print processing machine

A method for monitoring a post print processing machine through which printed products are successively transported, the post print processing machine having an operating cycle during which at least one printed product is processed, the method comprising:

• assigning an image recording device to the post print processing machine;
• connecting the image recording device to a computer unit;
• recording during the operating cycle an image series of at least two images of the printed product, while being processed by the post print processing machine, with a first time interval between the at least two recorded images, wherein the recording includes determining a moment for recording the first image of the image series by one of 1) a position encoder assigned to the post print processing machine and connected to at least one of the image recording device and the computer unit, or 2) the image recording device itself;
• transmitting the recorded images to the computer unit;
• and
• displaying the recorded images of the image series on a display device that is connected to the computer unit, wherein the displaying includes displaying the first image of the image series in real time and displaying the images with a time interval between the at least two images that is longer than the first time interval to generate a slow motion display of the recorded images.