datum axis
1.Based on the laser scanning measuring principle, changes of chinks between knife edge and the axis of the measured part are indirectly measured by the laser scanning measuring system, using the calibration rotation mechanism and the axial feed execution mechanisms. The coaxiality error of the measured axis relative to the datum axis is thus measured.
3.Moreover,with the datum come from calculation and test,it seams that after the number of batten floor n>3 the change of B effected by n is too weak to be ignored. Hence,that indicates it is available that the laterlly buckle of the batten column with the single axis of symmetry could be calculated with B worked out from H-shaped anglicizing element without n.
