CNC lathes, like all other electrical and mechanical equipment, will face the problems of aging electronic parts, rusting of structural parts, and wear of mechanical parts after a period of use. Therefore, in order to keep the CNC lathe machining in a better state, the CNC lathe must be regularly maintained, and the accuracy of  lathe CNC machining must be tested and calibrated.

(1) Geometric accuracy detection

Among the main items of geometric accuracy check of CNC lathe machining, the tools used for linear motion axis straightness check items are flat ruler and dial indicator. These two tools usually test the linear deviation of moving parts perpendicular to the other two axes of the motion axis. For example, a most common vertical china CNC machining center, the test of set accuracy mainly includes the flatness of CNC lathe machining and the verticality of the motion axis moving in all directions. The runout of the central spindle, the axis of the spindle, the axis of rotation and the vertical direction of the mechanical table. The parallelism of the table when the machine moves in the x-axis and y-axis coordinate directions; the parallelism of the table’s t-shaped side groove when moving in the x-coordinate direction; the straightness of the spindle and the parallelism of the spindle axis when the z-axis moves in the coordinate direction, spindle The shaft’s steering is beating etc.

(2) Detection position accuracy

The position accuracy required for CNC lathes can be divided into positioning accuracy, reverse deviation accuracy, and repeated positioning accuracy. The positioning accuracy is mainly affected by the work surface or moving structural parts processed by CNC lathes. Whether the actual moving position and the position of the program code are highly consistent during production. The inconsistency difference is the positioning accuracy error, and the errors of the servo system, the detection system, the feed system, and the geometric errors of the machine tool moving structural parts are important factors that directly affect the accuracy errors of the production and processing parts dimensions.