本文件定义了四项测试: -环境温度变化误差（ETVE）测试旋转主轴引起的热变形测试；-由移动线性轴引起的热变形测试；-由部件旋转运动引起的热变形试验。 移动线性轴引起的热变形试验（见第7条）仅适用于数控（NC）机床，旨在量化热膨胀和收缩以及结构角变形的影响。出于实际原因，第7条中所述的试验方法适用于直线轴长度不超过2000 mm的机器。 如果它们用于轴长超过2000 mm的机器，则在每个轴的正常范围内选择代表性长度为2000 mm的试验。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document defines four tests: — an environmental temperature variation error (ETVE) test;— a test for thermal distortion caused by rotating spindles;— a test for thermal distortion caused by moving linear axes;— a test for thermal distortion caused by rotary motion of components. The tests for thermal distortion caused by moving linear axes (see Clause 7) are applicable to numerically controlled (NC) machines only and are designed to quantify the effects of thermal expansion and contraction as well as the angular deformation of structures. For practical reasons, the test methods described in Clause 7 apply to machines with linear axes up to 2 000 mm in length. If they are used for machines with axes longer than 2 000 mm, a representative length of 2 000 mm in the normal range of each axis is chosen for the tests.All current amendments available at time of purchase are included with the purchase of this document.