CNC Basic & Prog.

7/30/2019 CNC Basic & Prog.

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WELCOMETO

FUTURE CNC TRAINIG INSTITUTE

CENTRE OF EXCELLENCE.


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CNC MACHINING (Turning VMC,HMC)

&

PROGRAMMING


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EDUCATIONAL

QUALIFICATION

10th, 12th, ITI, Diploma, Degree (Any

Trade )


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CNC MACHINING (Turning VMC,HMC)

&

PROGRAMMING


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COURSE CONTENT

Definition of CNC History of CNC Types of CNC Main Parts of CNC Makers of CNC Operating Panel Introduction of CNC Programming

Setting of CNC Machines Engineering Drawing / MeasuringInstrumnets

CNC Maintenance


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CNC : Computer and Numeric Control

Conventionally, an operator decides and adjustsvarious machines parameters like feed , depth ofcut etc depending on type of job , and controls

the slide movements by hand. In a CNC

Machine functions and slide movements are

controlled by motors using computer programs.

What is a CNC Machine ?


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Overview

By integrating a computer processor, computernumerical control, or CNC as it is now known,

allows part machining programs to be edited and

stored in the computer memory as well as

permitting diagnostics and quality control functionsduring the actual machining.

All CNC machining begins with a part program,

which is a sequential instructions or coded

commands that direct the specific machine

functions.

The part program may be manually generated or,

more commonly, generated by computer aided part

C f


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The most basic function of any CNC machine is automatic,precise, and consistent motion control.

Rather than applying completely mechanical devices to

cause motion as is required on most conventional machinetools, CNC machines allow motion control in a

revolutionary manner.

All forms of CNC equipment have two or more directions

of motion, called axes. These axes can be precisely andautomatically positioned along their lengths of travel.

The two most common axis types are linear (driven along

a straight path) and rotary (driven along a circular path).

Motion Control The Heart of

Machine


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Basic CNC Principles


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Coordinates System

Absolute Coordinate System Incremental Coordinate System


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Each axis consists of a mechanical component, such as a slide thatmoves, a servo drive motor that powers the mechanical movement,

and a ball screw to transfer the power from the servo drive motor to the

mechanical component.

These components, along with the computer controls that govern

them, are referred to as an axis drive system.


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The method of accurate work positioning in relation to the cuttingtool is called the rectangular coordinate system. On the vertical

mill, the horizontal base line is designated the X axis, while the

vertical base line is designated the Y axis. The Z axis is at a right

angle, perpendicular to both the X and Y axes.

Increments for all base lines are specified in linear measurements,

for most machines the smallest increment is one ten-thousandth of

an inch (.0001). If the machine is graduated in metric the smallest

increment is usually one thousandth of a millimeter (.001mm).

The rectangular coordinate system allows the mathematical plottingof points in space. These points or locations are called coordinates.

The coordinates in turn relate to the tool center and dictate the tool

path through the work.

Work Positioning


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CNC Machines-

Advantages/Disadvantages

Advantages : -

High Repeatability and Precision e.g. Aircraft parts

Volume of production is very high

Complex contours/surfaces need to be machined. E.g. Turbines

Flexibility in job change, automatic tool settings, less scrap

More safe, higher productivity, betterqualityLess paper work, faster prototype production, reduction in leadtimes

Disadvantages: -Costly setup, skilled operators

Computers, programming knowledge required

Maintenance is difficult


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Types of CNC Machine

1 CNC Turning

2 CNC Vertical Machining Centre

3 CNC Horizontal Machining Centre4 CNC Grinder

5 CNC Tool & Cutter

6 CNC Wire Cutter

7 CNC Welding


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Main Parts of CNC

Turning Center ( TC )

Vertical Machining Center ( VMC )


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CNC Turning Center

Automated version of a manual lathe.

Programmed to change tools automatically.

Used for turning and boring wood, metal andplastic.

Main Parts :

MECHANICAL PARTS

ELECTRICAL PARTS


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CNC Turning Center Parts

Mechanical :

Head Stock :- It is used for holding the Jobs

a ) Draw Bar: Operated by Hydraulic Pressure & used for Opening &closing of Jaws.

b) Jaws : It is used for Holding the Job

c) Chuck : It is used for Holding the Jaws.Tail Stock :- It is used to support Longer Jobs.

Turret :- It is used to holding the tool and supports against cutting forceduring cutting.

a) Tool Holder : It is fitted in slot of turrets & used for holding tools.

b) Drive system : It is used for turret indexing.

MECHANICAL PARTS

ELECTRICAL PARTS


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CNC Milling Machine

Has 3 ~ 8 Axes.

Used for wood, metal and plastic.

Used to make 3D prototypes, moulds, cutting

dies,

printing plates and signs.


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How CNC WorksControlled by G and M codes.

These are number values and co-ordinates.

Each number or code is assigned to a particularoperation.

Typed in manually to CAD by machine operators.

G&M codes are automatically generated by thecomputer software.


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Features of CNC Machinery

The tool or material moves.

Tools can operate in 1~5 axes.

Larger machines have a machine control unit(MCU) which manages operations.

Movement is controlled by a motors

(actuators).

Feedback is provided by sensors

(transducers)

Tool magazines are used to change tools

automatically.


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CNC Programming Basics

CNC instructions are called part program commands.

When running, a part program is interpreted one

command line at a time until all lines are completed.

Commands, which are also referred to as blocks, are

made up of words which each begin with a letter

address and end with a numerical value.


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CNC Programming Basics

Each letter address relates to a specific machine

function. G and M letter addresses are two of the

most common. A G letter specifies certain machine

preparations such as inch or metric modes, orabsolutes versus incremental modes.

A M letter specifies miscellaneous machine

functions and work like on/off switches for coolantflow, tool changing, or spindle rotation. Other letter

addresses are used to direct a wide variety of other

machine commands.


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Programming Key Letters

O - Program number (Used for program identification)

N - Sequence number (Used for line identification)

G - Preparatory function

X - X axis designation

Y - Y axis designationZ - Z axis designation

R - Radius designation

F Feed rate designation

S - Spindle speed designationH - Tool length offset designation

D - Tool radius offset designation

T - Tool Designation

M - Miscellaneous function


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CNC programming

Important things to know:

Coordinate System

Units, incremental or absolute positioning

Coordinates: X,Y,Z, RX,RY,RZ

Feed rate and spindle speed

Coolant Control: On/Off, Flood, Mist

Tool Control: Tool and tool parameters


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CNC Programming

Programming consists of a series of instructions in form of letter codes

Preparatory Codes:

G codes- Initial machining setup and establishing operating conditions

N codes- specify program line number to executed by the MCU

Axis Codes: X,Y,Z - Used to specify motion of the slide along X, Y, Z

direction

Feed and Speed Codes: F and S- Specify feed and spindle speed

Tool codes: T specify tool number

Miscellaneous codes M codes For coolant control and other

activities


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Table of Important G codes

G00 Rapid Transverse

G01 Linear InterpolationG02 Circular Interpolation, CW

G03 Circular Interpolation, CCW

G17 XY Plane,G18 XZ Plane,G19 YZ Plane

G20/G70 Inch units

G21/G71 Metric Units

G40 Cutter compensation cancelG41 Cutter compensation left

G42 Cutter compensation right

G43 Tool length compensation (plus)

G43 Tool length compensation (plus)

G44 Tool length compensation (minus)

G49 Tool length compensation cancelG80 Cancel canned cycles

G81 Drilling cycle

G82 Counter boring cycle

G83 Deep hole drilling cycle

G90 Absolute positioning

G91 Incremental positioning


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Table of Important M codesM00 Program stopM01 Optional program stop

M02 Program end

M03 Spindle on clockwiseM04 Spindle on counterclockwise

M05 Spindle stop

M06 Tool change

M08 Coolant on

M09 Coolant off

M10 Clamps on

M11 Clamps off

M30 Program stop, reset to start


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APT Programming ExampleCylindrical Part

F25

F22.5

F17.5

20

Raw Material

Finished Part

70

30


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APT Programming Example (CylindricalPart)

O0013

N0005 G53N0010 T0303N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X22.50 Z2.0 S500N0080 G01 Z-30.0 F100N0090 G00 X23.0 Z2.0 S500

N0100 G84 X17.5 Z-20.0 D0=200 D2=200 D3=650N0110 G00 Z2.0N0120 X50.0 Z50.0N0130 M30


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APT Program Interpretation

O0013

Program identification number


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O0013

N0005 G53

To cancel any previous working zero

point


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O0013

N0005 G53N0010 T0303

N0010 Sequence numberT0303 Select tool number 303

APT Program


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O0013

N0005 G53N0010 T0404N0020 G57 G00 X26.0 Z0.0 S500 M04

G57 To set the working zero point as saved

G00 Rapid movement (no cutting)X26.0 Xlocation (as a diameter; 13 form zero)Z0.0 ZlocationS500 Spindle speed is 500 rpmM04 Rotate spindle counterclockwise

APT ProgramInterpretation

x

z

(0,0) +ve

+ve


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O0013

N0005 G53

N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100

G01 Linear interpolation (cutting)

X-0.20 Move only in x direction untilyou pass

the center by 0.1 mm (facing)F100 Set feed rate to 100 mm/min.



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O0013N0005 G53

N0010 T0404

N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0

G00 Move rapidly away from work piece (nocutting)Z2.0 the movement is 2 mm away from theface.



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O0013

N0005 G53

N0010 T0404

N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0

Go to a safe location away from the workpiece[x = 50 (25 from zero), z = 50] to change the tool.



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O0013

N0005 G53N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04

N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404

T0404 Select tool number 404



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O0013N0005 G53

N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X22.50 Z2.0 S500

G57 PS0G00 Rapid movement (no cutting)X22.50 Xlocation (as a diameter; 11.25 form zero)Z2.0 ZlocationS500 Spindle speed is 500 rpm



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O0013

N0005 G53

N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04

N0080 G01 Z-30.0 F100

G01 Linear interpolation (cutting)Z-30 Move only in z direction (external turning)F100 Set feed rate to 100 mm/min.



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O0013

N0005 G53

N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04

N0080 G01 X22.5 Z-70.0 F100N0090 G00 X23.0 Z2.0 S500

G00 Move rapidly away from work piece (nocutting) to location x= 23.0 (11.50 from zero)

and z = 2.0.



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O0013

N0005 G53N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04N0080 G01 X22.5 Z-70.0 F100N0090 G00 X26.0 Z2.0 S500N0100 G84 X17.5 Z-20.0 D0=200 D2=200 D3=650

G84 Turning cycle for machining the stepX17.5 final diameterZ-20 length of step is 20 mmD0=200 Finish allowance in X direction (0.2 mm)D2=200Finish allowance in Z direction (0.2 mm)D3=650 Depth of cut in each pass (0.65 mm)



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O0013

N0005 G53N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100

N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04N0080 G01 X22.5 Z-70.0 F100N0090 G00 X26.0 Z2.0 S500

N0100 G84 X17.5 Z-20.0 D0=200 D2=200 D3=650N0110 G00 Z2.0

G00 Move rapidly away from workpiece (nocutting)

Z2.0 the movement is 2 mm away from the face.



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O0013N0005 G53N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100

N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04N0080 G01 X22.5 Z-70.0 F100

N0090 G00 X26.0 Z2.0 S500N0100 G84 X17.5 Z-20.0 D0=200 D2=200 D3=650N0110 G00 Z2.0N0120 X50.0 Z50.0

X50.0 Z50.0 Move to the tool changing location



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O0013

N0005 G53N0010 T0404N0020 G57 G00 X26.00 Z0.0 S500 M04N0030 G01 X-0.20 F100

N0040 G00 Z2.0N0050 X50.0 Z50.0N0060 T0404N0070 G57 G00 X25.00 Z2.0 S500 M04N0080 G01 X22.5 Z-70.0 F100N0090 G00 X26.0 Z2.0 S500

N0100 G84 X17.5 Z-20.0 D0=200 D2=200 D3=650N0110 G00 Z2.0N0120 X50.0 Z50.0 T00N0130 M30

M30 Program End



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Programming Example

Raw Material FinishedPart


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Programming Example

G55 X200 Y80Program 1N001 M06 T1N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150

N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75N006 G01 X70 Y60 Z-0.5 XYFeed 75N007 G01 X30 Y60 Z-0.5 XYFeed 75N008 G01 X0 Y40 Z-0.5 XYFeed 75

N009 G01 X0 Y0 Z-0.5 XYFeed 75N010 G81 R3 E9 N7 Z-0.5N011 M05N012 M02

x

y


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Programming Example

Tool ChangeG55 X200 Y80Program 2N001 M06 T2N002 M03 rpm 400

N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150

N008 G01 X50 Y15 Z-10 ZFeed 75N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75N012 G01 X50 Y45 Z10 ZFeed 150N013 M05N014 M02

x

y


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Program Interpretation

G55 X200 Y80Setting the datum to the lower left corner of thework piece


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G55 X200 Y80Program 1

Program Identification Number


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G55 X200 Y80Program 1N001 M06 T1

N001 Sequence NumberM06 Tool Change (End Mill with

Diameter=12mmT1 Tool Number


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G55 X200 Y80

Program 1N001 M06 T1N002 M03 rpm 400

Start rotating the spindle clockwisewith 400 rpm


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G55 X200 Y80Program 1N001 M06 T1

N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150

Go to Safe Position with feed150mm/min


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G55 X200 Y80Program 1N001 M06 T1N002 M03 rpm 400

N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X-8 Y0 Z-0.5 ZFeed 150

Lower the end mill to determine thedepth of cut


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N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75

Move from the lower left cornerof the work piece to the rightlower one cutting withfeed=75mm/min


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N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75N006 G01 X70 Y60 Z-0.5 XYFeed 75

Move from the lower left corner of thework piece to the right lower one

cutting with feed=75mm/min


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N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75N006 G01 X70 Y60 Z-0.5 XYFeed 75N007 G01 X30 Y60 Z-0.5 XYFeed 75

Cutting the horizontally up toX=30


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Cutting to X=0 & Y=40


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N009 G01 X0 Y0 Z-0.5 XYFeed 75

Complete the countering


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N009 G01 X0 Y0 Z-0.5 XYFeed 75N010 G81 R3 E9 N7 Z-0.5

Repeat 7 times blocks from N003 toN009 with incremental offset of Z=-0.5


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N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75

N006 G01 X70 Y60 Z-0.5 XYFeed 75N007 G01 X30 Y60 Z-0.5 XYFeed 75

N008 G01 X0 Y40 Z-0.5 XYFeed 75N009 G01 X0 Y0 Z-0.5 XYFeed 75N010 G81 R3 E9 N7 Z-0.5

N011 M05

Spindle Off


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N004 G01 X-8 Y0 Z-0.5 ZFeed 150N005 G01 X70 Y0 Z-0.5 XYFeed 75N006 G01 X70 Y60 Z-0.5 XYFeed 75N007 G01 X30 Y60 Z-0.5 XYFeed 75N008 G01 X0 Y40 Z-0.5 XYFeed 75N009 G01 X0 Y0 Z-0.5 XYFeed 75N010 G81 R3 E9 N7 Z-0.5N011 M05N012 M02

End Program


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Tool Change

Changing the tool


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Tool ChangeG55 X200 Y80

Setting the datum to the lower left corner of the workpiece


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Tool ChangeG55 X200 Y80Program 2

Program Identification Number


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N001 M06 T2

N001 Sequence NumberM06 Tool Change (Drill withDiameter=6mm

T2 Tool Number


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N001 M06 T2N002 M03 rpm 400

Start rotating the spindle clockwise with400 rpm


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Tool ChangeG55 X200 Y80Program 2N001 M06 T2

N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150

Go to Safe Position with feed 150mm/min


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150

Stop above the center of the first hole


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75

Start Drill the first hole


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150

N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150

Retract to a position above the hole


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150

Stop above the center of the second hole


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Tool ChangeG55 X200 Y80Program 2N001 M06 T2N002 M03 rpm 400

N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150

N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75

Drill the second hole


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150

N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75

N009 G01 X50 Y15 Z10 ZFeed 150

Retract to a position above the second hole


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Tool Change


N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150

N008 G01 X50 Y15 Z-10 ZFeed 75N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150

Stop above the center of the third hole


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N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed150N005 G01 X20 Y15 Z-10 ZFeed 75

N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150

N008 G01 X50 Y15 Z-10 ZFeed 75N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75

Drill the third hole


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Tool ChangeG55 X200 Y80Program 2N001 M06 T2N002 M03 rpm 400N003 G01 X-8 Y0 Z0 XYFeed 150N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75

N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75N012 G01 X50 Y45 Z10 ZFeed 150

Retract to a position above the third hole


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Tool Change


N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75

N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75N012 G01 X50 Y45 Z10 ZFeed 150N013 M05

Spindle off


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Tool Change


N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75N012 G01 X50 Y45 Z10 ZFeed 150N013 M05N014 M02

End Program


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Tool Change


N004 G01 X20 Y15 Z10 XYFeed 150 ZFeed 150N005 G01 X20 Y15 Z-10 ZFeed 75N006 G01 X20 Y15 Z10 ZFeed 150N007 G01 X50 Y15 Z10 ZFeed 150N008 G01 X50 Y15 Z-10 ZFeed 75N009 G01 X50 Y15 Z10 ZFeed 150N010 G01 X50 Y45 Z10 ZFeed 150N011 G01 X50 Y45 Z-10 ZFeed 75N012 G01 X50 Y45 Z10 ZFeed 150N013 M05N014 M02

End Program


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Thank You


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CNC MILLING


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INTRODUCTION OF CNC

MILLING PROGRAMMING

CUTTING TOOLS FOR CNC


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CUTTING TOOLS FOR CNC

MILLINGCUTTING PARAMETERS

TOOLS PATTERNS

FACTORS AFFECTING MILL PARTS

SELECTION OF TOOLS

INTRODUCTION OF CNC


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TURNING And Milling

PROGRAMMINGFANUC CONTROLL1 INTRODUCTION OF FANUC CONTROLLER2 PLANNING FOR OPERATIONS

3 PART PROGRAMMING

4 STOCK REMOVAL CYCLE

5 DRILLING CYCLE

6 BORING CYCLE

7 THREAD CUTTING CYCLE


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PROGRAM TRANSFERSPROGRAM PREPARATION WITH CAD CAMPROGRAM DATA TRANSFER FROM PC TOCNC M/C

PROGRAM DATA TRANSFER FROM PC TO DNC

OPERATIONS


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SAFETY PRECAUTIONSSAFE HANDLING OF TOOLS

SAFE HANDLING OF EQUIPMENTS

RIGHT WAY TO CNC OPERATING.

CLEANLINESS OF CNC MACHINE & SHOP

*Lecture Notes *I t d ti t CNC M hi


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Introduction to CNC Machines

and CNC Programming

C l d G d


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Commonly used G codes

G00 Preparatory code to control final position of thetool and not concerned with the path that is followed in

arriving at the final destination.

G01 Tool is required to move in a straight lineconnecting current position and final position. Used for

tool movement without any machining- point to point

control. (linear interpolation)

G02 Tool path followed is along an arc specified by I, Jand K codes.( circular interpolation)

CNC Basic & Prog.

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