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Title: NC and CNC machines and Control Programming
Page Link: NC and CNC machines and Control Programming -
Posted By: project report helper
Created at: Wednesday 20th of October 2010 12:58:38 PM
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NC and CNC machines and Control Programming


History of CNC


1949
US Air Force asks MIT to develop a numerically controlled machine.

1952
Prototype NC machine demonstrated (punched tape input)


1980-
CNC machines (computer used to page link directly to controller)


1990-
DNC: external computer “drip feeds” control programmer to machine tool controller
....etc

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Title: NC and CNC machines and Control Programming ppt
Page Link: NC and CNC machines and Control Programming ppt -
Posted By: seminar details
Created at: Friday 08th of June 2012 03:23:34 PM
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NC and CNC machines and Control Programming




Motivation and uses


To manufacture complex curved geometries in 2D or 3D was extremely expensive by mechanical means (which usually would require complex jigs to control the cutter motions)


Machining components with repeatable accuracy


Advantages of CNC

Easier to program;
- Easy storage of existing programs;
- Easy to change a program
- Avoids human errors
- NC machines are s ....etc

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Title: difference between nc cnc and dnc machines pdf
Page Link: difference between nc cnc and dnc machines pdf -
Posted By:
Created at: Thursday 16th of June 2016 05:54:34 PM
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Title: iv and piv drives pdf
Page Link: iv and piv drives pdf -
Posted By:
Created at: Wednesday 16th of March 2016 12:43:46 AM
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Hi..I would like to know about IV and PIV drives..
I would like to know about IV and PIV drives..
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Title: difference between nc cnc and dnc machines pdf
Page Link: difference between nc cnc and dnc machines pdf -
Posted By:
Created at: Sunday 01st of May 2016 04:17:03 AM
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The difference between NC and CNC is one of age andcapability.

The earliest NC machines performed limited functionsand movements controlled by punched tape or punch.

As the technology evolved, the machines were equiped with increasingly powerful microprocessors (computers) with the addition of these computers, NC machinesbecome CNC machines.

CNC machines have far more capability than theirpredecessor. ....etc

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Title: cnc pick and place crane abstract
Page Link: cnc pick and place crane abstract -
Posted By:
Created at: Sunday 21st of September 2014 07:35:21 PM
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Synopsis and abstract of cnc pick and place crane
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Title: STUDY ON PRINCIPLE AND OPERATIONS OF CNC MACHINES IN VARIOUS FABRICATION PROCESSES
Page Link: STUDY ON PRINCIPLE AND OPERATIONS OF CNC MACHINES IN VARIOUS FABRICATION PROCESSES -
Posted By: smart paper boy
Created at: Friday 29th of July 2011 11:55:07 AM
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PRESENTED BY
SUBHENDU KUMAR BEHERA


INTRODUCTION –
BHEL was established more than 50 years ago when its first plant was setup in Bhopal ushering in the indigenous Heavy Electrical Equipment Industry in India. A dream which has been more than realized with a well recognized track record of performance it has been earning profits continuously since 1971-72 and achieved a turnover of Rs 2,658 crore for the year 2007-08, showing a growth of 17 per cent over the previous year. Bharat Heavy Electricals Limited is ....etc

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Title: how piv gearbox work fundamental
Page Link: how piv gearbox work fundamental -
Posted By:
Created at: Friday 08th of November 2013 06:34:23 AM
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Input shaft in rotating but output shaft is not rotating sometimes when the load id high otherwise it is rotating..for what reason it is not rotating when it is in load what to be checked inside the piv gear box and how yo check?? ....etc

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Title: CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
Page Link: CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS -
Posted By: projectsofme
Created at: Saturday 02nd of October 2010 11:47:57 AM
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CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
INTRODUCTION TO DRIVES

Mechanical components used for power transmission. It may be belt, chain or gear depending on engine design parameters like - Distance between crankshaft and camshaft, engine maximum speed, engine-torque and engine construction cost. - Power transmission is done from one shaft to another shaft which may or may not rotate at same spe ....etc

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Title: difference between chopper fed drives and converter fed drives pdf
Page Link: difference between chopper fed drives and converter fed drives pdf -
Posted By:
Created at: Saturday 21st of November 2015 06:27:01 AM
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