{'fraction_non_alphanumeric': 0.01574074074074074, 'fraction_numerical': 0.0, 'mean_word_length': 5.073033707865169, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Different measuring methods of REVO five-axis coordinate measuring machine

REVO head is a high efficiency and accuracy five-axis measuring system designed and applied on coordinate measuring machine. It is now widely used in the measurement of precision parts of aircraft engine. As a high precision and high efficiency measurement system, the accuracy of the measurement result can only be guaranteed, in the case of ensuing the correctness of the measurement methods. This papers presents two measurement methods of REVO five-axis head based on coordinate measuring machine, using an NPL designed and manufactured freeform material standard consisting of an aluminium block with geometric shaped blended to form a pseudo freeform surface as a measurement example. By comparing the result of REVO five-axis head CMM and the result given by NPL. The accuracy of the measurement method can be verified. And then combined with the results, this paper explores how to better ensure the accuracy of measurement results. This has profound effect on future precision-parts measurement.