Is it possible to measure whether the roll is not round / circular due to wear?
When the CADNO instrument has been correctly pre-configured to suit the absolute diameter of the roll under test. The calliper is supported perpendicular to the roll axis and the gauging tips are at opposite ends of a horizontal diameter. The carriage is designed to permit the calliper to be moved smoothly across the roll barrel. Variation in diameter from the start position, at which the instrument was “zeroed”, is measured and recorded. The carriage wheels are designed to prevent the instrument slipping around the circumference but there is no reason why some low friction fabric should not be placed under the wheel thereby allowing the roll to be rotated slowly under the instrument. In “calibration mode” the display gives the actual movement of the gauging tip in micron and so the displayed reading could be correlated with the rotation of the roll barrel. (Although such a reading is possible, as far as I am aware none of our customers make regular use of the instrument for this purpo
