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NIMS Core CNC Milling Skills
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NIMS Core CNC Milling Skills
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NIMS Core CNC Milling Skills1-2-3 block - correct answer-A precise metal block with dimensions measuring 25.4 mm,
50.8 mm, and 76.2 mm long, respectively. A ___ ___ can be used to touch off a tool during
calculation of tool length offset.
axes - correct answer-An imaginary line that passes through the center of an object. ___ are
used to measure the distances of objects in the Cartesian coordinate system.
Cartesian coordinate system - correct answer-A positioning system that uses three
perpendicular linear axes to locate positions in three-dimensional space. The ___ ___ ___'s
axes are the X axis, Y axis, and Z axis.
CNC - correct answer-Computer numerical control. A sophisticated machining device that
uses a computer to carry out machining operations. ___ machine tools are much more
sophisticated than their manual counterparts.
computer numerical control - correct answer-CNC. A sophisticated machining device that
uses a computer to carry out machining operations. ___ ___ ___ machine tools are much
more sophisticated than their manual counterparts.
contour - correct answer-A curved surface or dimension that is cut into a workpiece.
Contours can be affected by the dimensions of the cutting tool if CRC is not used.
CRC - correct answer-Cutter radius compensation. An offset that accounts for variations in
tool diameter. CRC is only necessary for tools that continuously cut along a horizontal plane.
cutter radius compensation - correct answer-CRC. An offset that accounts for variations in
tool diameter. Cutter radius compensation is only necessary for tools that continuously cut
along a horizontal plane.
diameters - correct answer-The distance from one edge of a circle to the opposite edge
across its widest point. Tool diameters must be accounted for with cutter radius
compensation.
drills - correct answer-A multi-point cutting tool used to make round holes. Drills are usually
made from high-speed steel and cemented carbides.
edge finder - correct answer-A device used to locate the exact position of a part edge along
the X axis or Y axis. Edge finders determine workshift offsets.
end mills - correct answer-A milling cutter that cuts with its bottom and side edges. End mills
can be used to machine grooves, slots, circular slots, and pockets, among other features.
fixture - correct answer-A customized device that is used to position and hold a workpiece in
place. Fixtures are normally used to machine flat surfaces parallel to the table on a CNC mill.
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