1. Determination of the accuracy of the rotary table's positioning https://www.youtube.com/watch?v=osqX7iQEnuI Standard measuring tools, such as a turntable, an angle polyhedron, a circular grating, and a collimator (collimator), among others, can be selected depending on the situation. Using the measuring method described above, rotate the worktable at an angle in either the forward (or reverse) direction for a few rotations, stop, lock, and locate the position, then quickly rotate the worktable in the same direction for 30 rotations while locking the positioning every 30 and measuring. Indexing error is defined as the maximum value of the difference between the actual rotation angle and the theoretical value (command value) for each positioning position. The indexing error is determined by measuring the forward rotation and the reverse rotation for one circle each. https://www.youtube.com/watch?v=f-zsGd2yqw8 It is generally necessary to perform key measurements on several right-angle equal division points, such as 0, 90, 180, and 270 degrees, in order to meet the requirements of dry-type transformers in actual use. In addition, the accuracy of these points must be improved by one level in comparison to the accuracy of other angular positions.2. The rotary table's indexing accuracy is determined through repeated use.The measuring method consists in three repetitions of positioning at any three positions within a circle of the rotary table, followed by three repetitions of detection under rotation in the forward and reverse directions, respectively. The maximum indexing accuracy is defined as the difference between all readings and the theoretical value of the corresponding position, multiplied by the number of measurements. In order to learn more about cnc milling milling part milling part milling part knowledge, please join the. If it is a https://www.cnclathing.com/cnc-milling cnc milling milling rotary table, select one measurement point every 30 seconds as the target position, and perform five rapid positioning operations of each target position in both the forward and reverse directions, then record the actual position. The position deviation is defined as the difference between the reached position and the target position. The standard deviation is calculated using the method specified in GB10931-89, which is based on the position deviation. Using the cnc milling milling milling services milling services rotary table, the maximum value of the standard deviation of each measurement point is 6 times the repeatability indexing accuracy of each measurement point.3. Determination of the rotary table's accuracy in terms of return to originThe measurement method consists in performing a return-to-origin from seven arbitrary positions, determining the stop position, and using the largest difference read as the precision of the return-to-origin to calculate the precision of the return to origin.It should be noted that the current detection of positioning accuracy is carried out under the conditions of fast and precise positioning and positioning. When positioning with different feed speeds on some cnc milling milling china milling part machine tools that have a poor feed system, different positioning accuracy values will be obtained. Furthermore, the ambient temperature and the state of operation of the coordinate axis have an effect on the measurement result of positioning accuracy. A semi-closed loop system is used by the majority of  milling part milling machine tools today. The drive motor is equipped with the vast majority of position detection components, yielding a maximum error of 0.010.02mm over a 1m stroke. It shouldn't come as a surprise. Thermal elongation has resulted in this type of error. Pre-tensioning (pre-tensioning) is a technique used by some machine tools to reduce the impact.The accuracy of repeated positioning of each coordinate axis is the most fundamental accuracy index that reflects the axis's position. It is a measure of the accuracy with which the axis moves and its stability. A machine tool with poor accuracy can't possibly be used in a production environment with any consistency, it seems. Today, with the increasing number of functions available in a numerical control system, it is possible to compensate for the system error of movement accuracy of each ejector mark, such as the accumulated pitch error and the backlash error, on an ongoing basis. All that cannot be compensated is the random error, as well as the repeated positioning accuracy. Only the comprehensive random error of the feed drive mechanism is reflected in this value; this error cannot be corrected by numerical control system compensation. It is only the feed drive chain that can be fine-tuned and corrected when it is discovered to be out of tolerance. Consequently, if the machine tool can be chosen, it is preferable to select a machine tool with high repeat positioning accuracy, if this option is available.