CNC machined parts may experience scratches during the machining process due to various reasons. To avoid this situation, the following aspects can be taken into consideration: selecting appropriate cutting tools: ensuring the use of appropriate cutting tools, including tool materials, edge geometry, and cutting conditions. Choose cutting tools that match the workpiece material to reduce the risk of scratches. Control the feed and cutting speed: Adjuste the feed and cutting speed appropriately to avoid excessive cutting force caused by high speed and feed amount, which can lead to scratches. Auxilium aut lubricantem utilizat: Auxilium aut lubricantem utilizat per machinas temperaturam succidentem humiliare potest, fortem succidentem et frictionem dimittere, et auxilium evadere scratches. Optimize viam machinationis: Reasonably plan the machining path to avoid unnecessary movement and collision of the tool on the surface of the workpiece, thereby reducing the possibility of scratches. Conservite tabulam opus et fixturas mundas: assecurate quod superficies opus tabulae et fixturae mundae sunt et liberi de inmunditibus, ut non evaderent escas causas a inmunditibus aut particibus in manipulatione. Regular inspection and maintenance of equipment: Regular inspect the wear and tear of key components such as cutting tools, fixtures, and transmission systems of CNC machine tools, replace or repair them in a timely manner, and ensure the normal operation and machining accuracy of the equipment. Standardos operantium: Operatores familiari sunt proceduras operantis et fluxus machinarum CNC processentibus, stricto sequuntur requiribus operationis, et evadere scratces causas maloperationis aut operationis improperis.