The purpose of this paper is to study the characteristics and performance of pine oil and its ester as a base fluid material for electrorheological fluids. Here, all the tested fluids had a relatively low concentration level of between 5-15% of weight to study the electrorheological strength and phenomena for rotary machines as an application for keeping the working fluid in a steady position while the machine is not working. The objective of this basic study is to give an introduction to the electrorheological fluids based on polyaniline particles and pine oil and to measure their dependencies on changes in the applied external electric field, temperature, shear rate, dynamic viscosity and concentration, and to study the influence of grinding the particles.
This study focused on the systematic error compensation of CNC machines via software way. The method is based on machining test pieces, measuring same for finding the systematic errors of a machine, forming an error map and using the map for correcting the tool paths of the NC-program. Technically, it was shown that by measuring the systematic errors of machines and numerically calculating new, compensated parameters, the precision of aging machines could be substantially improved. Resultingly, the method extends the lifetime of an older machine, postponing the need for new investment for several years.
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