Previous year question paper for CNCMA (Diploma Mechanical Engineering 5th)

CNC Machines and Automation

Previous year question paper with solutions for CNC Machines and Automation from 2014 to 2018

Our website provides solved previous year question paper for CNC Machines and Automation from 2014 to 2018. Doing preparation from the previous year question paper helps you to get good marks in exams. From our CNCMA question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

1. Introduction (06 hrs)

Introduction to NC, CNC & DNC, their advantages, disadvantages and applications. Basic components of CNC machines, Machine Control Unit, input devices, selection of

components to be machined on CNC machines, Axis identification

2. Construction and Tooling (06 Hrs)

Design features, specification of CNC machines, use of slideways, balls, rollers and

coatings, motor and leadscrew, swarf removal, safety and guarding devices, various

cutting tools for CNC machines, Concept of CNC tool holder, different pallet systems

and automatic tool changer system, management of a tool room.

3. System Devices (12 Hrs)

Control System; Open Loop and Closed Loop System, Concept of Actuators,

Transducers and Sensors, Tachometer, LVDT, opto-interrupters, potentiometers for linear

and angular position, encoder and decoder and axis drives

4. Part Programming (08 Hrs)

Introduction to Part programming, Basic concepts of part programming, NC words, part

programming formats, simple programming for rational components, part programming

using conned cycles, subroutines and do loops, tool off sets, cutter radius compensation

and tool wear compensation.

5. Problems in CNC Machines (04 Hrs)

Common problems in CNC machines related to mechanical, electrical and pneumatic,

electronic components. Study of common problems and remedies, use of on-time fault

finding diagnosis tools in CNC machines.

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6. Automation and NC system (06 Hrs)

Concept of automation, emerging trends in automation, automatic assembly. Overview of

FMS, Group technology, CAD/CAM and CIM.

7. Robot Technology (06 hrs)

Introduction to robot technology, basic robot motion and its applications

2018
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2017
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2016
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2015
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2014
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