Improving the measurement of thread parameters by use of corundum elements

Abstract

Considered an advanced method of the three wires to measure the average diameter dav and pitch P of the thread using three elements corundum (synthetic sapphire, sapphire, ruby): two fibers and tip with the ability to visualize and measure the size of the contact zone with the product to calculate the contact elastic deformation. It is proposed to use two fibers incoherent and one coherent interferometers to measure the position of corundum fibers and the tip. A method for calculating the diameter dav and pitch P of the thread based on the results of interferometer measurements by using the compensation of contact elastic deformations is presented.