Analyzing the Causes of Dimensional Errors in CNC Lathe Workpiece Processing

As is well known, CNC lathe is a new type of processing equipment equipped with CNC numerical control system, servo control system and other control equipment, as well as high-precision feed system, tool magazine and other execution mechanisms. In terms of processing form, it is different from any other machining machine tool so far. Generally speaking, CNC lathes are high-precision and efficient processing equipment that integrates automated processing and composite centralized processing. However, there are many factors that ultimately affect the machining accuracy and efficiency of the workpiece. This article briefly introduces the reasons for the machining scale error of CNC lathe workpieces, hoping to be useful to us.
The main reasons for forming scale errors in workpiece processing
As we know, CNC lathe is composed of control system, servo drive equipment, servo motor, mechanical feeding equipment, workbench, reaction measuring equipment, etc. During workpiece processing, after digital operations in the CNC numerical control system, the control signal is announced to the servo drive equipment, driving the servo motor to rotate, and then passed to the workbench through the mechanical feeding equipment, causing relative motion between the workpiece and the tool. At the same time, the orientation detection reaction equipment converts the actual relative movement between the workpiece and the tool into an electrical signal and responds to the CNC numerical control equipment, Numerical control equipment compares the instruction indexing amount with the practical indexing amount of the response, in order to process a workpiece that meets the requirements of the machining program design.
However, in the practical processing of CNC lathes, it is often observed that the relative movement between the workpiece and the tool is not completely in accordance with the instruction values, resulting in a discrepancy between the dimensions of the processed parts and the design. Thus, the occurrence of processing scale error phenomenon is presented. The main reasons for this type of problem are: the actual indexing value of the servo motor matches the instruction indexing value, but the relative movement of the workpiece and tool does not meet the requirements; The actual index value of the servo motor does not match the instruction index value; Zero return azimuth error of machine tool transmission system; Several reasons include external interference or pulse loss, as well as mechanical problems.