Roller levitation height

The distance of both rollers from each other or from the roller to the support surface is the crucial dimension for rolling processes for metals, plastics or other materials. In the case of sensitive processes and high material accuracies, the lift of the upper roller must be checked constantly so that imminent rejection is avoided. The contacting inductive and the non-contact methods are suitable for this. In the case of contacting methods, the sensor is mounted on the outside on the roller guide. The change in clearance is transmitted to a plunger whose position change is measured by the inductive sensor.
In the case of the non-contact method, the roller is between the transmitter and receiver of an optical micrometer at the height of the lift. The emitted light curtain is partially covered by the roller. The remainder reaches the receiver through the gap. The gap can be calculated based on the light quantity measurement.

Related sensors and products

Inductive sensors (LVDT)

More application examples in Metal processing

Bending/smoothness of Aluminium cast covers Non-contact thickness measurement of aluminium Aluminium rim dimension Aluminium forge - temperature measurement Aluminium – temperature measurement Aluminium rolling - temperature measurement Tempering - temperature measurement Sheet thickness Bolts – temperature measurement Coil unwinding Coil diameter Coil edge Hardening – temperature measurement Cooling process - temperature measurement Thickness measurement using displacement sensors Strip width when trimming metal strips Double-sheet detection before pressing Thickness monitoring in straightening factories Cutting edge measurement Weld seam inspection on pipes Extrusion - temperature measurement Roller runout Roller clearance Flatness measurement in rolling mills Angle