I.三坐标测量机验收办法Acceptance Inspection Manual for CMM

在用户现场调试后的测量机验收方法，依据标准GB/T 16857.2-2006《坐标计量学－第二部分：用于测量尺寸的坐标测量机》（等同国际标准ISO 10360-2:2002《坐标计量学－第二部分：用于测量尺寸的坐标测量机》）。按本办法执行。

The acceptance inspection on site by customer should follow this manual which is made in accord with the Chinese standard of GB/T 16857.2-2006 the second part of Geometrical Product Specifications- CMMs used for measuring size. (This standard is equivalent of the International Standard of ISO 10360-2:2002.)

• 项目Inspect Item:
  • 外观及各部分的相互作用Appearance and function for each section
  • 计算机、打印机及软件功能Function of computer printer and software
  • 探测误差（MPE_P）Maximum Permissible Probing Error                           
  • 示值误差（MPE_E）Maximum Permissible Error of indication for size measurement       
• 方法Inspect method:

前测量机应通电24小时以上。

The CMM should keep the status of ‘power on’ over 24 hours.

• 目测和操作试验外观及各部分的相互作用。

Check by eye to confirm the appearance is OK and operate the CMM to confirm each section can work well.                   

• 用相应的诊断程序计算机、打印机及软件功能。

Check the function of computer printer and software by relevant analytic program.

• 探测误差（MPE_P）的检测

Inspect Maximum Permissible Probing Error (MPE_P):

在直径不小于10mm不大于50mm的检测球上，用长度符合厂商规定的探针，随意选择探针的方位，触测25个点，各点在半球上的分布尽量均匀，用全部25个测量值计算出小二乘球的中心，并计算出各点的径向距离，大径向距离与小径向距离之差即为探测误差。应满足给定的MPE_P值。

A placed test sphere which has a diameter not less than 10 mmand not greater than 50 mm is measured with 25 equally distributed points by a tip whose length is stated by manufacturer. These 25 stochastic points should locate on arbitrary direction. Use all 25 measurements to compute the Least Square associated sphere. Calculate the distance between each of the 25 measurements and the sphere centre in the radial direction. The range of the 25 distances is MPE_P. The actual measurement on site must be within the stated MPE_P.

• 长度测量的示值误差（MPE_E）的检测

Inspect Maximum Permissible Error of indication for size measurement（MPE_E）:

•  在坐标测量机的工作空间任选七个方位，每个方位测5个尺寸的量块，每个尺寸的量块测量三次。即35组测量长度测量次数为105次。计算105个长度测量的误差值△L，应满足给定的坐标测量机长度测量的示值误差MPE_E值。
  Choose 7 different positions within the CMM measuring volume and measure a set of 5 sizes gauge block at each position. Each size is measured 3 times so can get a total of 105 measurements in 35 groups. Calculate △L-the error of this 105 length measurements. All of them must be within the specified MPE_E.
•  35组测量长度中，允许多有5组，其三次重复测量中有一次出规定的MPE_E值，对每个差的测量长度，应在相应的方位再测10次，如10次复测得到的所有长度测量的误差值△L均在MPE_E值内，则示值误差（MPE_E）的检测被通过。
  In the 35 groups of data 5 groups of data at most can be permitted to have 1 of the 3 measurements over the stated MPE_E value. If such case occurs for each oversized measurement it should be measured again at the same position for 10 more times. If all of the new 10 measurements’ errors of △L are within MPE_E value the verification for MPE_E is passed.
• 上述测量中探针长度应符合厂商规定，量块短长度不应大于30mm；量块大长度至少是坐标测量机工作空间对角线大长度的66％，如过1m时，则用1m量块。
   The length of probe tip above-mentioned is stated by manufacturer. The minimum length of gauge block should be shorter than 30mm and the maximum length should be longer than 66% of the maximum cater-corner length of CMM’s working volume. The maximum length of block should be 1m if the value calculated is longer than 1m.
• 验收交接Acceptance:                                                             
  • 以记录、装箱单和合同为准双方交接、验收。     

验收合格，双方代表在验收报告上签字。若有异议，协商解决。遗留问题可签署备忘录，以便服务、解决.

Buyer should check and accept the CMM according to the inspection report packing list and contract. If inspection result is OK the representatives of both sides should sign on the Acceptance Report. If disagreements occur settlement through amicable negotiation between the two parties is advocated. Any unsettled problem should be recorded in memorandum to help both sides to look for further settlement.