Measurement assembly for measuring wear of the surface of revolution of rotating members, a machine that incorporates said assembly and method of measurement

A measurement method for measuring wear of the surface of revolution of rotating members in a container treatment machine comprising a measurement assembly of the type comprising:

• a support structure (13);
• a rod (15) having a first sliding movement along a direction having a rectilinear component (S1) with respect to the support structure (13);
• a cam guide (17) having a second relative movement with respect to the sliding rod (15);
• at least one roller (19a, 19b) rotatably fixed to the sliding rod (15) and in rolling contact with a corresponding track (21a, 21b) of said cam guide (17), whereby the second relative movement between the cam guide (17) and the sliding rod (15) causes the first movement of the rod (15) along said sliding direction (S1),
• wherein the measurement method comprises the step of providing an indicator (23) of the position of said at least one roller (19a, 19b) along said rectilinear component (S1), said indicator being capable of generating an electrical signal indicative of the distance (d) between said indicator (23) and said roller (19a, 19b), characterized in that said distance (d) is compared with at least one deviation threshold in order to ascertain the degree of wear of a surface of said at least one roller (19a, 19b) and in that said distance (d) is compared with at least one deviation threshold of values measured during normal operation of the machine, with respect to values stored during a calibrating step.