Numerical control units for machine tools and “numerically controlled” machine tools as follows: a. Numerical control units for machine tools: a.1. Having four interpolating axes that can be coordinated simultaneously for “contouring control”; or a.2. Having two or more axes that can be coordinated simultaneously for contouring control and a minimum programmable increment better (less) than 0.001 mm; a.3. “Numerical control” units for machine tools having two, three or four interpolating axes that can be coordinated simultaneously for contouring control and capable of receiving directly (online) and processing computer aided design (CAD) data for internal preparation of machine instructions; or b. Motion control boards specially designed for machine tools and having any of the following characteristics: b.1. Interpolation in more than four axes; b.2. Capable of “real-time processing” of data to modify tool path, feed rate and spindle data, during the machining operation, by any of the following: b.2.a. Automatic calculation and modification of part programme data for machining in two or more axes by means of measuring cycles and access to source data; or b.2.b. “Adaptive control” with more than one physical variable measured and processed by means of a computing model (strategy) to change one or more machining instructions to optimise the process. b.3. Capable of receiving and processing CAD data for internal preparation of machine instructions; or c. “Numerically controlled” machine tools that, according to the manufacturer’s technical specifications, can be equipped with electronic devices for simultaneous “contouring control” in two or more axes and that have both of the following characteristics: c.1. Two or more axes that can be coordinated simultaneously for contouring control; and c.2. Positioning accuracies according to ISO 230/2 (2006), with all compensations available: c.2.a. Better than 15µm along any linear axis (overall positioning) for grinding machines; c.2.b. Better than 15µm along any linear axis (overall positioning) for milling machines; or c.2.c. Better than 15µm along any linear axis (overall positioning) for turning machines; or d. Machine tools, as follows, for removing or cutting metals, ceramics or composites, that, according to the manufacturer’s technical specifications, can be equipped with electronic devices for simultaneous “contouring control” in two or more axes: d.1. Machine tools for turning, grinding, milling or any combination thereof, having two or more axes that can be coordinated simultaneously for “contouring control” and having any of the following characteristics: d.1.a. One or more contouring tilting spindles; d.1.b. Camming (axial displacement) in one revolution of the spindle less (better) than 0.0006 mm total indicator reading (TIR); d.1.c. Run out (out of true running) in one revolution of the spindle less (better) than 0.0006 mm total indicator reading (TIR); d.1.d. The positioning accuracies with all compensations available, are less (better) than: 0.001° on any rotary axis; d.2. Electrical discharge machines (EDM) of the wire feed type that have five or more axes that can be coordinated simultaneously for “contouring control”.

2B991

SCHEDULE 2A - Critical-industry goods and critical-industry technology

Part 1B - MATERIALS PROCESSING

The Russia (Sanctions) (EU Exit) Regulations 2019

TECHNICAL NOTES FOR 2B991 TO 2B999: 1. Secondary parallel contouring axes, (e.g., the w-axis on horizontal boring mills or a secondary rotary axis the centre line of which is parallel to the primary rotary axis) are not counted in the total number of contouring axes. Rotary axes need not rotate over 360°. A rotary axis can be driven by a linear device (e.g., a screw or a rack-and-pinion). 2. The number of axes which can be coordinated simultaneously for “contouring control” is the number of axes along or around which, during processing of the workpiece, simultaneous and interrelated motions are performed between the workpiece and a tool. This does not include any additional axes along or around which other relative motions within the machine are performed, such as: 2.a. Wheel-dressing systems in grinding machines; 2.b. Parallel rotary axes designed for mounting of separate workpieces; 2.c. Co-linear rotary axes designed for manipulating the same workpiece by holding it in a chuck from different ends. 3. Axis nomenclature shall be in accordance with International Standard ISO 841:2001, Industrial automation systems and integration - Numerical control of machines - Coordinate system and motion nomenclature. 4. A “tilting spindle” is counted as a rotary axis. 5. ‘Stated “unidirectional positioning repeatability”’ may be used for each specific machine model as an alternative to individual machine tests, and is determined as follows: 5.a. Select five machines of a model to be evaluated; 5.b. Measure the linear axis repeatability (R↑,R↓) according to ISO 230-2:2014 and evaluate “unidirectional positioning repeatability” for each axis of each of the five machines; 5.c. Determine the arithmetic mean value of the “unidirectional positioning repeatability”-values for each axis of all five machines together. These arithmetic mean values “unidirectional positioning repeatability” ( ) become the stated value of each axis for the model...)( x, y, …); 5.d. Since the Category 2 list refers to each linear axis there will be as many ‘stated “unidirectional positioning repeatability”’ values as there are linear axes; 5.e. If any axis of a machine model not controlled by 2B001.a. to 2B001.c. has a ‘stated “unidirectional positioning repeatability”’ equal to or less than the specified “unidirectional positioning repeatability” of each machine tool model plus 0.7 µm, the builder should be required to reaffirm the accuracy level once every eighteen months. 6. For the purpose of 2B, measurement uncertainty for the “unidirectional positioning repeatability” of machine tools, as defined in the International Standard ISO 230-2:2014, shall not be considered. 7. For the purpose of 2B, the measurement of axes shall be made according to test procedures in 5.3.2. of ISO 230-2:2014. Tests for axes longer than 2 meters shall be made over 2 m segments. Axes longer than 4 m require multiple tests (e.g., two tests for axes longer than 4 m and up to 8 m, three tests for axes longer than 8 m and up to 12 m), each over 2 m segments and distributed in equal intervals over the axis length. Test segments are equally spaced along the full axis length, with any excess length equally divided at the beginning, in between, and at the end of the test segments. The smallest “unidirectional positioning repeatability”-value of all test segments is to be reported. Note: 2B991.d.1.a. applies to machine tools for grinding or milling only. Note: 2B991.d.1.b. applies to machine tools for turning only. Regulation 53A applies