Выполните упражнения по тексту от 10.04.2020
Exercise 1. Match the abbreviation with its full form:
1) NC a) computer-aided design
2) CNC b) Universal Serial Bus
3) CAD c) numerical control
4) CAM d) Electronics Industries Alliance
5) USB e) computer numerical controlled
6) LAN f) local area network
7) APT g) computer-aided manufacturing
8) EIA h) automatically programmed tool
Exercise 2.Define the non-final forms of the verb and translate the sentences into Russian:
Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to manually controlled via handwheels or levers or mechanically automated via cams alone.
The first NC machines were built in the 1940s and 50s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on paper tape.
These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computer numerical controlled(CNC) machine tools that have revolutionized the design process.
In modern CNC systems, end-to-end component design is highly automated using CAD/CAM programs.
The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine, and then loaded into the CNC machines for production.
In either case the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design.
This is because it was often easier to add a punch tape reader to a microprocessor controller than it was to re-write large libraries of tapes into a new format.
An entire product line of different sizes can be programmed using logic and simple math to create and scale an entire range of parts, or create a stock part that can be scaled to any size a customer demands.
It is even possible to build your own.
Exercise 3. Complete the sentences:
Numerical control (NC) refers to the automation of machine tools that are operated by … .
These early servomechanisms were rapidly … .
In modern CNC systems, end-to-end component design is highly automated using … .
In other cases, a number of different machines are used with … .
Floppy disks, USB flash drives and local area networking have replaced … .
The proliferation of CNC led to the need for new … .
A more recent advancement in CNC interpreters is support of … .
An entire product line of different sizes can be programmed using … .
As digital electronics has spread, CNC has fallen in price to the point where hobbyists can purchase any number of small … .
Exercise 4.Fill the gaps with the words under the line:
The first … machines were built in the 1940s and 50s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on paper tape.
These early … were rapidly augmented with analog and digital computers, creating the modern computer numerical controlled (CNC) machine tools that have revolutionized the design process.
The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine, and then loaded into the … machines for production.
In either case the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original … design.
One change that was implemented fairly widely was the switch from paper to mylar tapes, which are much more … .
The file format became so widely used that it has been embodied in an … standard.
A more recent advancement in CNC interpreters is support of logical commands, known as … programming.
The programmer can make if/then/else statements, loops, subprogram calls, perform …, and manipulate variables to create a large degree of freedom within one program.
various arithmetic, parametric, EIA, mechanically robust, CAD, CNC, servomechanisms, NC
1 663
41 873 
