{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11243221","patent":{"patent_number":"US-11243221","title":"Monitoring device and monitoring method of main spindle rotating speed in machine tool, and machine tool","assignee":null,"inventors":[],"filing_date":"2020-10-02T00:00:00.000Z","publication_date":"2022-02-08T00:00:00.000Z","cpc_codes":["B23Q","G05B"],"num_claims":19,"abstract":"A monitoring device of a main spindle rotation speed in a machine tool displays a variation state of the rotation speed by a rotation speed variation unit using a display unit in the machine tool. The monitoring device includes a variation value setting unit, a drawing unit, a first display unit, and a settable range calculating unit. The settable range calculating unit is configured to calculate a settable range of a variation amplitude and a variation cycle based on a calculation formula. The calculation formula includes the variation cycle, a difference between a first rotation speed and a second rotation speed at mutually different timings among the rotation speeds varied relative to a reference rotation speed, an inertia of a rotating body, a rated output of a motor that drives a main spindle, and a usage proportion to the rated output of the motor."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Monitoring device and monitoring method of main spindle rotating speed in machine tool, and machine tool","description":"A monitoring device of a main spindle rotation speed in a machine tool displays a variation state of the rotation speed by a rotation speed variation unit using a display unit in the machine tool. The","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11243221","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11243221","citation_suggestion":"Patentable. \"Monitoring device and monitoring method of main spindle rotating speed in machine tool, and machine tool\" (US-11243221). https://patentable.app/patents/US-11243221","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11243221","json":"https://patentable.app/api/llm-context/US-11243221","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:41:30.200Z"}