In the machining process of shaft parts, in order to avoid the problem of excessive errors, the following aspects need to be attention to: 1. Tool errors: Geometric errors and wear errors of the tool can both affect the accuracy of the machined parts. To reduce this error, it is necessary to choose appropriate tool materials and geometric parameters, install the tools correctly, regularly check the wear of the tools, and replace severely worn tools in a timely manner. 0002. Machine tool errores: Manufacturing errors, guide rail errors, and transmission chain errors of machine tools may have a significant impact on machining accuracy. Pro hoc, necesse est regular manere et calibrire instrumentum machinae ut certem esse in bono opus conditione. Meanwhile, during the machining process, the cutting amount should be reasonably selected to reduce the wear of the machine tool. 3. Errorem systemae procedentiae: Sistema procedentiae opera partibus, fixturis, instrumentis cutatis etc., et errore eius etiam potest effecti precisa partibus processionis. To reduce this error, appropriate fixtures should be selected to ensure the clamping accuracy of the workpiece; And choose cutting parameters reasonably to reduce tool wear. 4. Error dimensionalis: partes Axiales ad deviationem precision dimensionalis in processo conversationis pronae sunt. To avoid this situation, it is necessary to carefully read the drawings, master the use of the feed dial, and see the number of scales clearly; Calculate the cutting depth based on the machining allowance, conduct llow trial cutting, and then correct the cutting depth; Prius mensuram instrumentorum, oportet diligenter inspicere et adjustere partes, et mensuram instrumentos bene utilisere; Non potest mensurare quando temperatura operantis alta est, expecta donec temperatura ad temperaturam cubiculi antequam procedat. In addition, some specific error reduction methods can be used, such as directly reducing the original error method, error transfer method, and error grouping method. Haec metodes selecta sunt et applicatae iuxta conditiones et necessitates processionis.