1. Geometric accuracy of CNC woodworking lathe. Geometric accuracy includes shape accuracy, geometric accuracy of mutual position and geometric accuracy of relative motion. The surface shape of workpiece machined on NC lathe depends on the relative motion track between tool and workpiece, and the tool and workpiece are directly driven by the execution of NC woodworking lathe. Therefore, the geometric accuracy of NC lathe is the basic condition to ensure the processing accuracy. Each type of NC woodworking lathe has its own characteristics. Geometric accuracy requirements. Geometric accuracy generally includes the axial movement of the spindle, the radial circular jump of the spindle, the mutual perpendicularity of the coordinate directions, the equal height of the spindle cone hole axis and the tailstock uranium hole axis, etc.
2. Positioning accuracy of NC woodworking lathe. The positioning accuracy index controls the accuracy of the actual position when the moving parts of woodworking lathe move from one position to another. The error between the actual position and the expected position is called positioning error. The positioning errors of periodic rotating parts, such as tool holders, are reflected as angular displacement errors. Correspondingly, the positioning accuracy is called the positioning accuracy. If the moving parts of a CNC woodworking lathe are repeatedly positioned from one position to another, the maximum error between the actual positions reached by each positioning is called the repetitive positioning accuracy of the moving parts. Geometric accuracy, transmission accuracy and positioning accuracy of NC woodworking lathe are generally measured without cutting load and NC lathe is not moving or moving at a low speed, so they are generally referred to as static accuracy of NC lathe. Static accuracy depends on the manufacturing accuracy and assembly accuracy of the main parts of CNC woodworking lathe, such as spindle and its bearings, screw nuts, gear bed, box body, etc. The positioning accuracy generally includes: linear motion positioning accuracy, linear motion repetitive positioning accuracy, linear motion machinery origin return accuracy, rotary motion positioning accuracy, rotary motion repetitive positioning accuracy and rotary origin return accuracy.