Ka polasetiki ea CNC machining (Digital Computer Control), karolo e etsoa ka machining ka bongata ba boloko ba polasetiki ka metjhini e silang ea dijithale.Theknoloji ena e potlakileng ea prototyping e loketse tlhahiso ea li-unit ho latela tlhahlobo ea ts'ebetso.
CNC machining ea likarolo tsa prototype ea polasetiki ke mokhoa o bitsoang "subtractive" hobane ho na le ho tlosoa ha thepa.Khetho e pharaletseng ea li-resin e lumella likarolo ho fumanoa "thepa e nepahetseng", ka hona ho lumella thepa ea mechine e haufi le karolo e entsoeng ka ente (ABS, PC, PP, PVC, POM, PMMA, PA 6/66).