By Peter Ingham (Auth.)
This publication units out to give an explanation for the appliance of CAD structures to mechanical and creation engineering. it truly is geared toward scholars at BTEC HND/HNC point or on measure classes
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Additional info for CAD Systems in Mechanical and Production Engineering
Very often, when micros are used for CAD, their performance is enhanced by 42 CAD Systems fitting a second processor (or co-processor) to handle the arithmetic on floating point numbers. And, as we have mentioned, graphics capability can be enhanced by adding one of a number of proprietary graphics boards. Minis lie between the two extremes of desktop microcomputer and large powerful mainframe. The larger ones are called / superminis\ They are widely used for CAD work. Organization of CAD Processors The simple type of organization is when each user has a workstation and the workstations are not connected together in any way.
A message is placed on the bus by the Hardware 45 transmitting node and is carried to all the nodes on the line using a carrier signal. The system is complicated by the need to resolve collisions, when two nodes try to broadcast a message simultaneously. 26 Bus network A practical network may include elements of all these topologies, for instance, ring networks may be connected by 'gates' and may be joined to a bus network. Engineering Workstations Over the last few years there has been a continuous move towards 'distributed intelligence' in computer systems.
They are physically much less flexible and the recording surface access slot is protected by a metal sliding shutter. They 40 CAD Systems also can hold a fair amount of data, a double-sided one holding typically 720 kbytes. This capacity can be compared with the size of a typical novel which is about 500 000 characters, or 500 kbytes. A disk of this capacity would probably be capable of holding twenty or thirty reasonably detailed drawings. Write protect. 23) Most microcomputers used in CAD are fitted with hard, fixed or Winchester disks.
CAD Systems in Mechanical and Production Engineering by Peter Ingham (Auth.)