Division [2B206] Dimensional inspection machines, instruments or systems, other than those specified in 2B006, as follows:F1

1. a..

   Computer controlled or numerically controlled coordinate measuring machines (CMM) having either of the following characteristics:

   1. 1..

      Having only two axes and having a maximum permissible error of length measurement along any axis (one dimensional), identified as any combination of E_0x,MPE, E_0y,MPE, or E_0z,MPE, equal to or less (better) than (1,25 + L/1 000) μm (where L is the measured length in mm) at any point within the operating range of the machine (i.e., within the length of the axis), according to ISO 10360-2:2009; or

   2. 2..

      Three or more axes and having a three dimensional (volumetric) maximum permissible error of length measurement (E_0,MPE) equal to or less (better) than (1,7 + L/800) μm (where L is the measured length in mm) at any point within the operating range of the machine (i.e., within the length of the axis), according to ISO 10360-2:2009;

   Technical Note:

   The E_0,MPE of the most accurate configuration of the CMM specified according to ISO 10360-2:2009 by the manufacturer (e.g., best of the following: probe, stylus, length, motion parameters, environments) and with all compensations available shall be compared to the (1,7 + L/800) μm threshold.

2. b..

   Systems for simultaneous linear-angular inspection of hemishells, having both of the following characteristics:

   1. 1..

      "Measurement uncertainty" along any linear axis equal to or less (better) than 3,5 μm per 5 mm; and

   2. 2..

      "Angular position deviation" equal to or less than 0,02^o;

3. c..

   ‘Linear displacement’ measuring systems having all of the following characteristics:

   Technical Note:

   For the purpose of 2B206.c. ‘linear displacement’ means the change of distance between the measuring probe and the measured object.

   1. 1..

      Containing a "laser"; and

   2. 2..

      Capable of maintaining, for at least 12 hours, F2over a temperature range of ± 1 K (± 1 °C) around a standard temperature and standard pressure, all of the following:

      1. a..

         A "resolution" over their full scale of 0,1 μm or better; and

      2. b..

         With a "measurement uncertainty" equal to or better (less) than (0,2 + L/2 000) μm (L is the measured length in mm).

   Note:

   2B206.c. does not control measuring interferometer systems, without closed or open loop feedback, containing a laser to measure slide movement errors of machine tools, dimensional inspection machines, or similar equipment.

4. d..

   Linear variable differential transformer (LVDT) systems having both of the following characteristics:

   Technical Note:

   For the purpose of 2B206.d. ‘linear displacement’ means the change of distance between the measuring probe and the measured object.

   1. 1..

      Having any of the following:

      1. a..

         "Linearity" equal to or less (better) than 0,1 % measured from 0 to the full operating range, for LVDTs with an operating range up to 5 mm; or

      2. b..

         "Linearity" equal to or less (better) than 0,1 % measured from 0 to 5 mm for LVDTs with an operating range greater than 5 mm; and

   2. 2..

      Drift equal to or better (less) than 0,1 % per day at a standard ambient test room temperature ± 1 K (± 1 °C).

Note 1:

Machine tools that can be used as measuring machines are controlled if they meet or exceed the criteria specified for the machine tool function or the measuring machine function.

Note 2:

A machine specified in 2B206 is controlled if it exceeds the control threshold anywhere within its operating range.

Technical Notes: