This part of JB/T 11998 refers to GB/T 17421.1-1998 and GB/T 17421.2-2000, which stipulate the geometric accuracy inspection, CNC axis positioning accuracy and repeated positioning accuracy inspection, and machining inspection of CNC electric discharge micro hole machining machines. It also specifies the tolerance values corresponding to the above inspections. This section defines the terminology used for the main components of machine tools and names the coordinate axis in accordance with the provisions of GB/T 19660-2005. This section is applicable to CNC electric discharge micro hole machining machines (hereinafter referred to as machine tools) that can process apertures of 0.2 mm and below. This section only involves the inspection of machine tool accuracy, and is not applicable to the inspection of machine tool operation tests (such as vibration, abnormal noise, crawling of components, etc.) or its parameters (such as speed, feed rate, etc.), which are usually carried out before the accuracy inspection. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 17421.1-1998 · - General rules for the inspection of machine tools - Part I: Geometric accuracy of machine tools under no load or precision machining conditions - GB/T 17421.2-2000 General rules for the inspection of machine tools - Part 2: Determination of positioning accuracy and repeated positioning accuracy of CNC axes
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