The clamps at the transfer point must be reliably positioned at the edge of the material to ensure trouble-free production at a high process speed. The specific sensors and actuators from Erhardt+Leimer make this operation dependable. With the ELTIM basis weight measurement, the mass distribution from the extruder to the rewinder is reliably monitored during all steps of the stretching process. Of course, the material thickness as derived from the basis weight can also be displayed and, in this way, a target thickness adopted.