Measurement value correction of a reference mark on a material web

A controller for a machine, wherein the controller is configured to:

• control the machine to move a material web in a conveying direction through the machine having a first tool that functions in a non-positive locking manner and a second tool that functions in a non-positive locking manner and is located downstream of the first tool in the conveying direction;
• record a measurement value of a reference mark on the material web, the measurement value measured by a sensor that is located between the first tool and the second tool, wherein an adjustment of the second tool results in the measurement value having a measurement error;
• determine the measurement error via parameter values of the second tool;
• correct the measurement value by the measurement error;
• record at least a further measurement value downstream of the second tool in the conveying direction, wherein an adjustment of the second tool results in the further measurement value having a further measurement error;
• determine the further measurement error via the parameter values of the second tool;
• and
• correct the further measurement value by the further measurement error.

A machine in which a material web is moved in a conveying direction, the machine comprising:

• a first tool that functions in a non-positive locking manner;
• a second tool that functions in a non-positive locking manner and is located downstream of the first tool in the conveying direction;
• at least one sensor that is located between the first tool and the second tool for measuring a reference mark on the material web;
• and
• a controller configured to:
• record a measurement value between the first tool and the second tool, wherein an adjustment of the second tool results in the measurement value having a measurement error;
• determine the measurement error via parameter values of the second tool;
• correct the measurement value by the measurement error;
• record at least a further measurement value downstream of the second tool in the conveying direction, wherein an adjustment of the second tool results in the further measurement value having a further measurement error;
• determine the further measurement error via the parameter values of the second tool;
• and
• correct the further measurement value by the further measurement error.