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This ‘rotation error’ check is usually done in one of two ways: – by checking the element outlet pressure. – with phase sequency relay. If no pressure is built up after a few seconds of rotation, it means something is wrong, most probably, the element is rotating the wrong way. If your compressor uses this system,...
Evolutionary compensation method for spindle rotation error of computer numerical control grinding machine based on timing in-situ measurement
An evolutionary compensation method for a spindle rotation error of a CNC grinding machine is provided. Feature points are determined at an edge of a central hole of a spindle of a CNC grinding machine, and a spindle rotation error in-situ measuring device is fixed on the grinding machine and aligned with the edge of the central hole; a trajectory image of the feature points is acquired by using the measuring device; a measured value of the spindle rotation error is obtained according to the trajectory image; features of the spindle rotation error are fused with the measured value of the spindle rotation error, a spindle rotation error compensation model is established, to output a spindle rotation error compensation value, thereby compensating the spindle rotation error. By continuously calibrating the error model using the measured value, accuracy of the error model has been continuously optimized.
Owner:ZHEJIANG UNIV