This insightful blog post was developed by Fagor Automation and made available to DMS users as part of our cooperative partnership. In some circles, the mere mentioning of the word “accuracy” will create an awkward silence. Despite this, accuracy is more of a concern than ever before. Applications requiring acute accuracy not just on individual applications, but uniformed applications that tie together has become commonplace. For over 30 years now, the traditional offered linear compensation tables have been the final solution to providing machine tool accuracy. However, to achieve a more a global accuracy as frequently required within the aerospace industry, these conventional compensation tools are insufficient considering they do not take into account the machine’s kinematics and other factors related to the mechanical and electrical relationship between the multiple combinations of axes of motion.
Z axis first 3 results -tables (pitch, straightness X, straightness Y)
(These types of accuracy improvements are not possible without this technology.) Another aspect taken into effect with Fagor Volumetric Compensation is temperature. Your typical machine shop environment varies throughout the day and so does the machine temperature depending on the machine utilization. Because of this, a machine tool may expand or contract altering the calculated compensation values. To compensate, the Fagor 8070 CNC offers up to 4 separate volumetric compensation tables to make corrections at four different temperature levels. This helps maintain consistent part quality regardless of what temperature variances you may have. These tables may also be used to apply different compensations depending on mechanical devices that may have been installed temporarily on the machine. For example, if a machine uses interchangeable articulated spindles, the compensation tables may be configured accordingly for each individual spindle. (The image is of a DMS Heavy Duty Cast Iron Yoke – HSK Spindle.) New innovations such as Volumetric Compensation by Fagor Automation help provide solutions for modern aircraftdesign and similar long-term global projects. The processes utilized by aerospace manufacturers require a standard of measurement and method of evaluation beyond what has been available in the past. We’re proud to be in partnership with this global cooperative. So, we ask – has Volumetric Compensation become an industry-accepted method for enhancing both the accuracy and performance of a machine tool? The answer is yes. Myth confirmed.