1. Define NC system?
NC is defined as a form of
programmable automation in which the process is controlled by alphanumeric
data.
2. What is MCU?
MCU is a hardware system which
reads, interprets and translates the program of instructions into mechanical
action of machine tool.
3.
List out any four advantage of using NC?
Ø Increased flexibility.
Ø Reduced setup time.
Ø Production of complex part.
Ø Elimination of special jigs and fixtures.
4.
What are the limitations of using NC?
Ø Relatively high price.
Ø More complicated maintenance, a special crew is
desirable.
Ø Highly skilled and properly trained programmers are
needed.
5.
What are all the problems encountered with NC system?
Ø Part programming mistakes.
Ø Non-optional speeds and feeds.
Ø Problem with punched tape and tape reader.
Ø Problem with controller and management information.
6. Define CNC?
CNC is defined as a NC system that
utilizes a dedicated, stored computer program to perform some or the entire
basic NC functions.
7.
Write the main functions of CNC?
Ø Machine tool control.
Ø In-process compensation.
Ø Improved programming and operating features.
Ø Diagnostics
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