Synchronizing control apparatus
March 2, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectrical shaft system Rotary speed ratio control arrangement Spindle rotation control system Numerical control machine tool with sliding error compensation function Error detecting mechanism for servosystem Method for compensating for servo delay caused at an arc or corner System for synchronizing two or more process units Tool support synchronizing system for numerical control apparatus Robot control system Method and system for controlling synchronous drive systems InventorsAssigneeApplicationNo. 487449 filed on 03/02/1990US Classes:700/71, Specific compensation or stabilization feature318/85, Synchronizing or phasing control318/625, Plural servomotors318/632With compensating featuresExaminersPrimary: Smith, JerryAssistant: Brown, Thomas W. Attorney, Agent or FirmInternational ClassG05B 011/32Foreign Application Priority Data1989-03-02 JPAbstractA synchronizing control apparatus for synchronously rotating master and slave main spindles of a pin grinder, wherein a servomotor for the slave main spindle is rotated at a speed corresponding to a compensated command value while the master main spindle is rotated at a speed corresponding to a noncompensated command value. The compensated command value is calculated based on a synchronizing error between the master and slave main spindles at a predetermined interval longer than the length of instable condition of a servo loop for the slave main spindle. When the synchronizing error is larger than a predetermined limit value, the command value for the slave main spindle is gradually compensated in order to prevent the compensated command value from changing too abruptly.Field of SearchWith protective or reliability increasing features (e.g., "fail-safe" systems)Monitoring systems Program- or pattern-controlled systems Digital or numerical systems With compensating features Plural servomotors Synchronizing or phasing control With stabilizing features (e.g., anti-hunting, damping) By auxiliary feedback loop Rate feedback Variable rate feedback With "feed-rate" control One transmitter or controller element follows another | |
