Miller Magazine Issue: 129 September 2020

70 MILLER / September 2020 Always more precise: Modern production processes have to meet ever higher quality requirements. Accordingly, the demands on the measuring technology used to determine the quality of the products are also increasing. This also applies to the measurement of surface roughness, such as the surface of rolls used in the milling industry. The corresponding measurement devices must meet ever higher demands on accuracy and also be as versatile as possible. In addition, end users of measuring instruments are increasingly demanding special solutions for automated, process-accompanying quality control systems. 15,000 measuring points on 15 millimetres Wear equals loss In the milling industry, the condition of the surfaces of the smooth and corrugated rolls is of decisive importance for the profitability of a mill. In modern mills, the roller mills, as the central production unit, run practically around the clock. Since the grinding process is basical- ly purely mechanical - coarse becomes fine by grinding - even modern rollers made of special alloys are subject to a certain amount of wear. Experienced millers know this, and numerous measurements and studies by mill manufactu- rers prove it: The degree of wear of the rol- lers has a direct influence on the quality of the products, the yield, the energy consumption, on moisture losses and also on the stability of the grinding process. The bottom line is that the higher the degree of wear, the higher the losses - in tons and dollars. Varıous control optıons These correlations explain the importance of regularly checking the condition of all smooth and corrugated rolls "working" in a mill. These checks can be carried out in various ways. The simplest, but also rather inaccurate, is the visu-