FMT Equipment has developed a new high speed, non-contacting measurement system to measure run-out and roundness (out-of-roundness) of paper or other rolls rotating in a machine. Up to 4000 measurements per second can be recorded.

Picture 1: A laser head on each side of a test roll are being bench tested.

An application: A paper reel at a full speed can be measured for out-of-roundness with a single laser head at a press room.

Picture 2 A sample report and a screen shot using our high speed recording capability. As you can see from bottom of the screen shot there are several reports available from one sample period of one second. When you click on a Rotation number you can view and print a report on that particular data. Rotation 3 is displayed.

Picture 3. The same TIR measurement with our one gauge Roundness procedure applied to it. The roll has 40 thousands (1 mm) of run-out and it is oval shaped by 8 thousands (0,2 mm).

Picture 4: A laser head and index mark sensor tested at 3,100 FPM (945 m/min).

Permanently installed Paper Roll Measuring Station

Would you like to be able to stop a shipment of a paper roll which is likely to break during high-speed printing?

It has been found that if the diameter of a paper roll varies by more than a predetermined amount along the length there is a greater chance that the paper coming off the roll at high speed will tear.

The FMT RollTrack® laser measuring station is a method of quality control. The paper rolls are measured at the paper mill before shipping. The paper roll passes through the measuring station where the diameter of the roll is sensed and the laser heads are positioned automatically to the roll centerline. Sensors start and stop the continuous diameter difference recording. A bar code reader may be used to enter a roll ID for the measurement.

The measurement information is fed to a computer to produce a graph. The computer analyzes the probability, based on the amount the diameter of the roll varies along its length, that the paper web will tear while being unrolled at high speed.


Picture 5: Front view of the FMT RollTrack® laser measuring station.