Measurement precision spindle

Spindle error motion measurement and research purposes
On the spindle error motion measurement and research has two Precision bearing:
From the design, manufacturing point of view, I hope to find out by measuring the study design, manufacturing factors and the relationship between the spindle error motion, and how the error motion characteristics, evaluation of the spindle system design and manufacturing quality, and find out the error of movement of the main reason for further improvement.
From the use of perspective, hoping to find the spindle movement and machining accuracy and surface roughness relationship and how the error motion characteristics, predict machine tools under ideal conditions can machined workpiece geometry and surface roughness, giving selection of machine tools and machine tools made in accordance with the design.
Spindle rotation accuracy of testing methods
Spindle rotation accuracy of the measurement method, there are direct and indirect measurement bearing manufacturer (specimen France) two categories, which have a direct measurement of static and dynamic measurements in two ways.
Static test method -
Insert the spindle taper hole precision of the test rod, test bars in contact with the surface of the scale and face, gently rotating spindle measurements at different angles on the readings. Advantages: measuring method is simple, easy to operate, it can be tested with the rotary spindle taper hole centerline centerline are concentric; Disadvantages: does not reflect the actual operating speed spindle error motion, and does not reflect the movement may cause processing errors form error and the surface roughness.
Dynamic test method -
Eccentrically mounted on standard test bars, in two mutually perpendicular radial fixed displacement sensor, and then install a vertical axial direction, the other displacement sensor, the signal input to the oscilloscope via an amplifier to measure the direction of rotation of the spindle error motion sensitive.
Motion error Figure Glossary
Total error motion (Total Error Motion) - more than enough laps to record all errors polar plots, which represents the main average error motion (Average Error Motion) - is the total error motion polar plot of the average contour, on behalf of the aircraft station ideal cutting conditions can best machined parts roundness. Random error motion (Asynchronous Error Motion) - is the total error of the mean error motion movement deviation, which represents the ideal cutting conditions can obtain surface roughness.
Basic error (Fundamental Error) - The average error motion of the closest circle, on behalf of spindle axis once per revolution axial errors.
Residual error (Residual Error) - The average error motion picture of the basic error of the deviation, on behalf of the plane of the end face machining