Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p105
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 296235–299181

parameters, environment) and with "all compensations available" shall be compared to the 1.7 + L/1,000 μm threshold.
2. B. 006. b. Linear displacement measuring instruments or systems, linear position feedback units, and "electronic assemblies", as follows:
Note: Interferometer and optical‑encoder measuring systems containing a "laser" are only specified in 2B006.b.3.
1. 'Non‑contact type measuring systems' with a 'resolution' equal to or less (better) than 0.2 µm within a measuring range up to 0.2 mm;
Technical Notes:
For the purposes of 2B006.b.1.:
1. 'Non-contact type measuring systems' are designed to measure the distance between the probe and measured object along a single vector, where the probe or measured object is in motion.
2. 'Measuring range' means the distance between the minimum and maximum working distance.
2. Linear position feedback units specially designed for machine tools and having an overall "accuracy" less (better) than (800 + (600 x L/1,000)) nm (L equals effective length in mm);
3. Measuring systems having all of the following:
a.  Containing a "laser";
b.  A 'resolution' over their full scale of 0.200 nm or less (better); and
c.  Capable of achieving a "measurement uncertainty" equal to or less (better) than (1.6 + L/2,000) nm (L is the measured length in mm) at any point within a measuring range, when compensated for the refractive index of air and measured over a period of 30 seconds at a temperature of 20±0.01°C; or
Technical Note:
For the purposes of 2B006.b., 'resolution' is the least increment of a measuring device; on digital instruments, the least significant bit.
2. B. 006. b. 4. "Electronic assemblies" specially designed to provide feedback capability in systems specified by 2B006.b.3.;
2. B. 006. c. Rotary position feedback units specially designed for machine tools or angular displacement measuring instruments, having an angular position "accuracy" equal to or less (better) than 0.9 second of arc;
Note:  2B006.c. does not apply to optical instruments, such as autocollimators, using collimated light (e.g., laser light) to detect angular displacement of a mirror.
2. B. 006. d. Equipment for measuring surface roughness (including surface defects), by measuring optical scatter with a sensitivity of 0.5 nm or less (better).
Note: 2B006. includes machine tools, other than those specified by 2B001., that can be used as measuring machines if they meet or exceed the criteria specified for the measuring machine function.
2. B. 007. "Robots" having any of the following characteristics and specially designed controllers and "end‑effectors" therefor:
N.B.: SEE ALSO 2B207.
a. Not used since 2017;
b. Specially designed to comply with national safety standards applicable to potentially explosive munitions environments;
Note: 2B007.b. does not apply to "robots" specially designed for paint‑spraying booths.
c. Specially designed or rated as radiation‑hardened to withstand a