basic cnc programming Milling

FANUC INDIA FA & ROBOT

1

BASIC PROGRAMMING OF CNC MILLING MACHINE


2

Course contents Page No.

General coordinate System 04

Designation of machine axes 05

Machine coordinate system 06

Work coordinate system 07

Work datum setting procedure 09

Work coordinate system – Selection 11

Structure of program 13

2Course contents


Course contents Page No.

Basic G codes 17

Basic M codes 26

Tool length compensation 27

Cutter radius compensation 29

Programming Examples 35

Canned cycles – Drilling 47

Pattern of holes 74

Custom macro programming 87


4

General Co-ordinate system

General coordinate system


5Designation of machine axis

Designation of machine axis


6Machine coordinate system

• The point that is specific to machine and serves as the reference of the machine is referred to as the machine zero point

• Machine tool builder sets a machine zero point for each machine

Machine coordinate system


7Work coordinate system

A coordinate system used for machining a workpiece is referred to as a workpiece coordinate system

A workpiece co-ordinate system is also called as work reference zero or work datum

The work datum will be set by the user before the machining process begins

Work coordinate system


8Work coordinate system

A coordinate system used for machining a workpiece is referred to as a workpiece coordinate system

A workpiece co-ordinate system is also called as work reference zero or work datum

The work datum will be set by the user before the machining process begins

Work coordinate system


9

Work datum setting procedure

Move the work table and spindle head to the reference position

Attach a dial gauge or fix the reference tool in the spindle

Bring the tool towards the work piece in rapid mode or manually and make the tool to touch on the surface of the workpiece and note the Z axis reading.

Then add the tool length with the same sign to get the Z co ordinate value and note down this value

WCS

MCS



10

Work datum setting procedure cont.,

Then move the tool to any one edge and make the tool to touch the edge and note down the readings of X and Y axes.ADD /subtract the radius of the tool from the readings

The readings will be the distance between the machine zero and work zero point

Record noted X, Y, Z values in any one of the work coordinate G codes (G54 to G59)



11

G54 Workpiece coordinate system 1G55 Workpiece coordinate system 2G56 Workpiece coordinate system 3G57 Workpiece coordinate system 4G58 Workpiece coordinate system 5G59 Workpiece coordinate system 6

Work piece coordinate system - selection

Work piece coordinate system selection


12

Work piece coordinate system Selection

Work piece coordinate system selection


13

Structure of Program



14Structure of Program


15Structure of Program


16

Block



17

- Preparatory function- Tool movement related functions

Basic G codes

Basic G codes


18

G94 - Feed per Minute

Basic G codes


19

G95 - Feed per revolution

Basic G codes


20

Co ordinate value & Dimensioning

- Absolute G90 & Incremental G91 Programming- Inch & Metric Programming – G20 & G21- Decimal Point Programming – PRM 3401#0=1

Basic G codes


21

Absolute and incremental programming

Basic G codes


22

Tool movement in a straight line

Basic G codes


23

Tool movement in a circular path

Basic G codes


24

Direction of circular interpolation

Basic G codes


25

ijk values

Basic G codes


26

Basic M codes

- Miscellaneous function- Machine operations related functions• M01 – Optional stop• M02 – Program stop • M03 – Spindle on, CW• M04 – Spindle on, CCW• M05 – Spindle stop• M06 – Turret indexing• M07 – Coolant on• M08 – Coolant on• M09 – Coolant off• M30 – Program stop and rewind

Basic M codes


27

Tool length compensation

The procedure of mentioning the difference of length of tool assumed during programming and actual tool used for machining is called tool length compensation

1) If the actual tool length is more than the assumed tool, the difference should be mentioned as follows

G43 H01 H01 – here 01 specifies the address where the difference of tool will be mentioned

2) If the actual tool length is less than the assumed tool, the difference should be

mentioned as followsG44 H01

H01 – here 01 specifies the address where the difference of tool will be mentioned



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• G43 - Tool length offset plus• G44 - Tool length offset minus• G49 - Tool length compensation cancel



29

G41 - Cutter radius compensation leftG42 - Cutter radius compensation rightG40 - Cutter radius compensation cancel

Cutter radius compensation

-When the Endmill cutter of some specified diameter is commanded to position at a location, actually the centre point of the cutter only coincide with the addressed point of the work piece.

- So, t is necessary to shift the cutter for a radius amount towards left or right from the position. The procedure of shifting the tool of radius amount is called as Cutter Radius Compensation



30

Type of operation

Direction of movement

Type of compensation

External Clockwise G41

External Counter clockwise

G42

Internal Clockwise G42

Internal Counter clockwise

G41

The type of compensation is selected from the starting point as follows




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32

G41 - Cutter radius compensation left

G41 D07;Here, D specifies the address of offset at which the radius of tool will be mentioned



33

G42 - Cutter radius compensation right

G41 D07;

Here, D specifies the address of offset at which the radius of tool will be mentioned



34

Operations performed in machining centre

Side cuttingHole machiningFace cutting

Operations in machining centre


35

G54

SQ 150

SQ 200

thickness 20mm

1

3

4

2

Programming Examples



36

Programming example

Making 150 mm* 150 mm square for a depth of 5mm in a given Billet

AssumptionsWork offset = G54Tool length compensation = H01

Point X co ordinate value

Y co ordinate value

1 25 25

2 25 175

3 175 175

4 175 25



37

O1001 ; Program Number

N1 G21 G94 ; Metric input, Feed in mm/min.

N2 G91 G28 X0 Y0 Z0 ; The tool is moved to home position

N3 T01 M06 ; (Dia. 15 mm End drill)

N4 G90 G54 G00 X25.0 Y25.0 ; Work offset call

N5 G43 H01 Z100.0 ; Tool length compensation call

N6 M03 S1000 Z20 ; Positioning above the starting point and spindle starts rotating at 1000 rpm

N7 G01 Z-5.0 F400 ; The tool is moved inside work of -5.0 mm

N8 Y175.0 ; The tool is moved to second corner

N9 X175.0 ; The tool is moved to third corner

N10 Y25.0 ; The tool is moved to fourth corner

N11 X25.0 ; The tool is moved back to first corner

N12 G00 Z100.0 M05 ; The tool is taken out of the work and spindle stop

N13 G91 G28 X0 Y0 Z0 ; The tool is moved back to home position

N14 M30 ; Program stop snd rewind



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1

2

3 4

5

6

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Blank size: 150mm*150mm*20mm

Point X Y

1 0 25

2 0 50

3 45 150

4 105 150

5 150 50

6 150 25

7 125 0

8 25 0

G55

PROGRAMMING EXAMPLE WITHOUT SUB PROGRAM



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N4 G90 G55 G00 X-25.0 Y-25.0 ; Work offset call



N7 G01 Z-20.0 F400 ; The tool is moved inside work of -20.0 mm

N8 G41 G01 X0.0 Y0.0 D01 ; Cutter radius compensation call

N9 G01 X0.0 Y50.0 ; The tool is moved to point 2







40

N14 G01 X125.0 Y0.0 ; The tool is moved point 7



N17 G40 G00 X-25.0 Y-25.0 ; The tool is moved back to starting position



N20 M30 ; Program stop and rewind



41

1

2

3 4

5

6

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Point X Y

1 0 25

2 0 50

3 45 150

4 105 150

5 150 50

6 150 25

7 125 0

8 25 0

G55

PROGRAMMING EXAMPLE WITH SUB PROGRAM



42








N7 G01 Z0.0 F400 ; The tool is moved To Z0.0

N8 M98 P1500 L10 ; Sub program No.1500 call, L indicates No. of times






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O 1500 ; Sub program No

N200 G91 Z-2.0 F400 ; The tool is moved incrementally -2 mm

N210 G90 G41 G01 X0.0 Y0.0 Cutter Radius comp. (left), F400 D01 ; The tool is moved towards work piece





N260 G01 X150.0 Y25.0 ; The tool is moved point 6





N310 M99 ; Sub program end



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1

2 3 4 5

678


Point X Y

1 0 0

2 0 200

3 75 200

4 125 200

5 200 200

6 200 0

7 125 0

8 75 0

G57

PROGRAMMING EXAMPLE WITH SUB PROGRAM

R25

R25



45








N7 G01 Z0.0 F400 ; The tool is moved To Z0.0

N8 M98 P1501 L10 ; Sub program No.1500 call, L indicates No. of times






46

O 1501 ; Sub program No

N200 G91 Z-2.0 F400 ; The tool is moved incrementally -2 mm

N210 G90 G41 G01 X0.0 Y0.0 Cutter Radius comp. (left), F400 D01 ; The tool is moved towards work piece

N220 G01 X0 Y200.0 ; The tool is moved to point 2


N240 G03 X125.0 Y200.0 R25.0 ; The tool is moved to point 4 with CIP-CCW


N260 G01 X200.0 Y0 ; The tool is moved point 6

N270 G01 X125.0 Y0 ; The tool is moved to point 7

N280 G03 X75.0 Y0 R25.0 ; The tool is moved to point 8 with CIP CCW

N290 G01 X0 Y0 ; The tool is moved to point 1


N310 M99 ; Sub program end



47

Canned cycles - Drilling



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STEP Description of the cycle

1 Rapid motion to hole position

2 Rapid motion to safety level/reference level

3 Feed rate motion to Z depth

4 Rapid retract to initial/reference level

FORMAT AND EXPLANATION

G81 X…. Y…. R…. Z…. F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)F = Federate specification

G81 SPOT DRILLING CYCLE



49

BLANK SIZE 100*100*20DIA. 8, FIVE HOLESHOLE1 (20,20)HOLE2 (20,80)HOLE3 (80,80)HOLE4 (80,20)HOLE5 (50,50)

Programming Example



50

PROGRAMMING EXAMPLE

O1005N1 G91 G28 X0 Y0 Z0N2 T01 M06N3 G21N4 G17 G90 G54 G00 X20 Y20N5 G43 H01 Z100N6 M03 S1000 Z20N7 G99 G81 Z-4. R5 F300N8 X80N9 Y80N10 X20N11 X50 Y50N12 G80 G00 Z100N13 G91 G28 X0 Y0 Z0N14 M05N15 M30



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4 Dwell at the depth in millisecond

5 Rapid retract to initial/reference level

G82 COUNTER BORING CYCLE

Format and explanation

G82 X…. Y…. R…. Z…. P….F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)P = Dwell time in millisecondsF = Federate specification



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PROGRAMMING EXAMPLE



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O1006

N1 G91 G28 X0 Y0 Z0

N2 T02 M06

N3 G21

N4 G17 G90 G54 G00 X20 Y20

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G82 Z-15. R5 P2000 F300

N8 X80

N9 Y80

N10 X20

N11 X50 Y50

N12 G80 G00 Z100 M05

N13 G91 G28 X0 Y0 Z0

N14 M30



54

DEEP HOLE DRILLING HIGH SPEED DEEP HOLE CYCLE

STEP Description of the cycle STEP Description of the cycle

1 Rapid motion to hole position 1 Rapid motion to hole position



3 Feed rate motion to Z depth by the amount of specified depth

3 Feed rate motion to Z depth by the amount of specified depth

4 Rapid retract to safety level/R level

4 Rapid retract by a clearance value (clearance value is set by a system parameter)

5 Rapid motion to the previous depth less a clearance (clearance is set by a system parameter)

5 Feed rate motion in Z axis by the distance specified plus clearance

6 Steps 3,4, and 5 repeat until the programmed Z depth is reached

6 Steps 4 and 5 repeat until the programmed Z depth is reached

7 Rapid retract to safety/R level 7 Rapid retract to safety/R level



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G73 X…. Y…. R…. Z…. Q….F…. G83 X…. Y…. R…. Z…. Q….F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)Q = Pecking depth (Micron)F = Federate specification

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)Q = Pecking depth (Micron)F = Federate specification



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WHEN TO USE DEEP HOLE DRILLING CYCLE (G83)For deep hole drilling, also known as peck drilling, where the drill has

to be retracted above the part (to a clearance position) after drilling to a certain depth.WHEN TO USE HIGH SPEED DEEP HOLE DRILLING CYCLE(G73)

For deep hole drilling, also known as peck drilling, where the chip breaking is ore important than the full retract of the drill from the holes. This type often used for a long series drills, when a full retract is not very important.



Programming Example


57

O1007

N1 G91 G28 X0 Y0 Z0

N2 T03 M06

N3 G21

N4 G17 G90 G54 G00 X20 Y20

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300 or G73 Z-30 R5 Q8000 F300

N8 X80

N9 Y80

N10 X20

N11 X50 Y50

N12 G80 G00 Z100 M05

N14 G91 G28 X0 Y0 Z0

N15 M30



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TAPPING CYCLE - STANDARD TAPPING CYCLE - REVERSE

STEP Description of the Cycle STEP Description of the cycle

1 Rapid motion to hole position 1 Rapid motion to hole position



3 Feed rate motion to Z depth 3 Feed rate motion to Z depth

4 Spindle rotation stop 4 Spindle rotation stop

5 Spindle reverse rotation (M04) and feed rate back to safety/R level

5 Spindle reverse rotation (M04) and feed rate back to safety/R level

6 Spindle rotation stop 6 Spindle rotation stop

7 Spindle rotation normal 7 Spindle rotation normal



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G84 X…. Y…. R…. Z….R… F…. G74 X…. Y…. R…. Z…R….. F….





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PROGRAMMING EXAMPLE

The important notes for the tapping operation• Safety/reference level should be higher in the tapping cycle than in the other cycles to follow for the stabilization of the feed rate, due to acceleration• Feed rate section for the tap is very important. In tapping, there is a direct relationship between the spindle speed and the lead of the tap. This relationship must be maintained at all the times.• The override switches on the control panel used for spindle speed and feed rate, are ineffective during these cycles.• Tapping motion (in or out of the part) will be completed even if the feed hold key is pressed during tapping cycle processing for safety reasons.


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O1008

N1 G91 G28 X0 Y0 Z0

N2 T03 M06

N3 G21

N4 G17 G90 G54 G00 X20 Y20

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G84 Z-15. R5 F300 or G74 Z-30 R5 F300 (Feed = RPM * Pitch)

N8 X80

N9 Y80

N10 X20

N11 X50 Y50

N12 G80 G00 Z100 M05

N13 G91 G28 X0 Y0 Z0

N14 M30



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G85 BORING CYCLESTEP Description of the cycle




4 Feed rate motion back to safety/R level


G85 X…. Y…. R…. Z…. F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)F = Feed rate specification


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DIMNSION OF BLANK 100*100*20HOLE DIA. 10 mmHOLE (50,50)


WHEN TO USE THIS CYCLE

This cycle is typically used for boring and reaming operations. This cycle is used in cases where the tool motion into and out of holes should improve the hole surface finish, its dimensional tolerances and/or its concentricity, roundness, etc.

PROGRAMMING EXAMPLE


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PROGRAMMING EXAMPLE

O1009

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X50 Y50

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G85 Z-20. R5 F300

N8 G80 G00Z100 M05

N9 G91 G28 X0 Y0 Z0

N10 M30



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PRECISION BORING CYCLE (G76)





4 Spindle rotation stop

5 Shifting in programmed direction

6 Rapid retract to reference level






4 Spindle rotation stop

5 Rapid retract to reference level

ROUGH BORING CYCLE (G86)


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G86 X…. Y…. R…. Z…Q... F (rough)G76 X…. Y…. R…. Z…I…J... F ….(fine)

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)F = Federate specificationQ = amount of shift for boringI, J = amount of shift

Format and Explanation


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O1009

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X50 Y50

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G86 Z-20. R5 F300

N8 G80 Z100

N9 G91 G28 X0 Y0 Z0

N10 M05

N11 M30


DIMNSION OF BLANK 100*100*20HOLE (50,50)

PROGRAMMING EXAMPLE


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BORING CYCLE (G88)


1 Rapid motion to XY position



4 Dwell at the depth in milliseconds

5 Spindle rotation stops (feed hold condition is generated and the CNC operator switches to manual operation mode and perform a manual task, then switches back to memory mode)

6 Rapid retract to safety/reference level

7 Spindle rotation on


G88 X…. Y…. R…. Z….P… F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)P = Dwell time in millisecondsF = Federate specification


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WHEN TO USE THIS CYCLE

This cycle is rare. Its use is limited to boring operations with special tools that require manual interference at the bottom of a hole. This cycle may be used by some tool manufacturers for certain operations.


DIMNSION OF BLANK 100*100*20

HOLE (50,50)

PROGRAMMING EXAMPLE


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O1010

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X50 Y50

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G88 Z-20. R5 P2000 F300

N8 G80 G00 Z100 M05

N9 G91 G28 X0 Y0 Z0

N10 M30



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BORING (REAMING) CYCLE (G89)


1 Rapid motion to XY position



4 Dwell at the depth

5 Feed rate motion back to safety/R level


G89 X…. Y…. R…. Z…. P…F….

X = Hole position in X axis Y = Hole position in Y axis R = Reference position (Z axis st. point)Z = Final depth (abs.)P = dwell time in millisecondsF = Federate specification


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WHEN TO USE THIS CYCLEFor boring operations, when the feed rate is required for the in and out

directions of the machined hole, with a specified dwell at the bottom. The dwell is the only value that distinguishes this cycle from the cycle85/G85.


DIMNSIONS OF BLANK 100*100*20HOLE DIA. 10 mmHOLE (50,50)

PROGRAMMING EXAMPLE


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O1011

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X50 Y50

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G85 Z-20. R5 P2000 F300

N8 G80 G00 Z100 M05

N9 G91 G28 X0 Y0 Z0

N10 M30

Pattern of holes


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PATTERN OF HOLES

RANDOM HOLE PATTERN

BLANK SIZE = 100*100*20DIA. 8, FIVE HOLESHOLE1 (28,16)HOLE2 (60,32)HOLE3 (88,40)HOLE4 (104,48)

Pattern of holes


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O1012

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X28 Y16

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300

N8 X60 Y32

N9 X88 Y40

N10 X104 Y 48

N11 G80 G00 Z100 M05

N13 G91 G28 X0 Y0 Z0

N14 M30

Pattern of holes


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STRAIGHT ROW HOLE PATTERNFirst hole dimension from ref. = (15,10)distance between holes = 20, diameter of holes = 10 mm

Pattern of holes

O1013

N1G21 G94

N2 G91 G28 X0 Y0 Z0

N3 T01 M06

N4 G17 G90 G54 G00 X15 Y10

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300

N8 G91 X20.0 K5

N9 G80 G00 Z100 M05

N10 G28 X0 Y0 Z0

N11 M30


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O1014

N1 G91 G28 X0 Y0 Z0

N2 T01 M06

N3 G21

N4 G17 G90 G54 G00 X15 Y10

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300

N8 G91 X20.0 K5

N9 G80 G00 Z100 M05

N10 G28 X0 Y0 Z0

N11 M30

Pattern of holes


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PATTERN OF HOLES IN AN INCLINED LINE

ANGLE OF THE INCLINED LINE WITH X AXIS = 15DISTANCE BETWEEN HOLES = 40FIRST HOLE DIMENSION IS (20,20)DIAMETER OF HOLES = 10 mm

The following calculation is required in FANUC to find distance between holes in X axis and in Y axis.X = 40 * cos15 = 38.63703305Y = 40 * sin15 = 10.3527618

Pattern of holes


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O1015

N1 G21 G94

N2 G91 G28 X0 Y0 Z0

N3 T01 M06

N4 G17 G90 G54 G00 X20 Y20

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300

N8 G91 X38.6370 Y10.3527 K5

N9 G80 G00 Z100 M05

N10 G28 X0 Y0 Z0

N11 M30

Pattern of holes


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RECTANGULAR GRID PATTERN

DISTANCE OF FIRST HOLEFROM REFERENCE = (20,30)DISTANCE BETWEEN COLUMNS = 25DISTANCE BETWEEN ROWS = 20DIAMETER OF HOLES = 10 mm

Pattern of holes

PROGRAMMING EXAMPLE

O1016

N1 G21 G94

N2 G91 G28 X0 Y0 Z0

N3 T01 M06

N4 G17 G90 G54 G00 X20 Y30

N5 G43 H01 Z100

N6 M03 S1000 Z20


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N7 G99 G83 Z-30. R5 Q8000 F300

N8 G91 Y20 K6

N9 X25

N10 Y-20 K6

N11 X25

N12 Y20 K6

N13 X25

N14 Y-20 K6

N15 X25

N16 Y20 K6

N17 G80 G00 Z100 M05

N18 G28 X0 Y0 Z0

N30 M30

Pattern of holes


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CIRCLE OF HOLES PATTERNDistance of reference point in X axis from the WCS = 75Distance of reference point in Y axis from the WCS = 60Starting angle of the first hole from X axis = 30 deg.Indexing angle between holes = 60, Number of holes = 6Radius of the circle = 50mm, Diameter of holes = 8mm

1

2

3

4

5

6

Pattern of holes


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Hole # 1X = 75 + 50 * cos30 = 118.30127 Y = 60 + 50 * sin30 = 85.0

Hole # 2X = 75 + 50 * cos90 = 75.0Y = 60 + 50 * sin90 = 110.0

Hole # 3X = 75 + 50 * cos150 = 31.6987298Y = 60 + 50 * sin150 = 85.0

Hole # 4X = 75 + 50 * cos210 = 31.6987298 Y = 60 + 50* sin210 = 35.0

Hole # 5X = 75 + 50 * cos270 = 75.0 Y = 60 + 50 * sin270 = 100.0

Hole # 6X = 75 + 50 * cos330 = 118.30127 Y = 60 + 50* sin330 = 35.0Pattern of holes


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O1017

N1 G91 G28 X0 Y0 Z0

N2 T03 M06

N3 G21

N4 G17 G90 G54 G00 X118.3012 Y85.0

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G99 G83 Z-30. R5 Q8000 F300

N8 X75.0 Y110.0

N9 X31.6987 Y85.0

N10 X31.6987 Y35.0

N11 X75.0 Y10

N12 X118.301 Y35.0

N13 G80 G00 Z100 M05

N14 G91 G28 X0 Y0 Z0

N15 M30

Pattern of holes


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CIRCLES OF HOLES USING POLAR SYSTEM

Distance of reference point in X axis from the WCS = 75Distance of reference point in Y axis from the WCS = 60Starting angle of the first hole from X axis = 30 deg.Indexing angle between holes = 60, Number of holes = 6Radius of the circle = 50mm, Diameter of holes = 8mm

1

2

3

4

5

6

Pattern of holes


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O1018

N1 G91 G28 X0 Y0 Z0

N2 T03 M06

N3 G21

N4 G17 G90 G54 G00 X75.0 Y60.0

N5 G43 H01 Z100

N6 M03 S1000 Z20

N7 G16; POLAR SYSTEM ON

N8 G99 G83 X50 Y30 Z-30. R5 Q8000 F300

N9 X50 Y90

N10 X50 Y150

N11 X50 Y210

N12 X50 Y270

N13 X50 Y330

N14 G15 ; POLAR SYSTEM OFF

N15 G80 G00 Z100 M05

N16 G91 G28 X0 Y0 Z0

N17 M30

Pattern of holes


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CUSTOM MACRO PROGRAMMING

Custom Macro programming


• Part Program prepared using variablesPart Program prepared using variables

• Arithmetic operations possibleArithmetic operations possible

• Conditional statements like GOTO , DO WHILE are usedConditional statements like GOTO , DO WHILE are used

• For developing user defined cyclesFor developing user defined cycles

• Can be easily called from user programCan be easily called from user program

Custom Macro



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Macro call



Simple Macro Call



91Custom Macro programming


• Once G66 is issued to specify a modal call a macro is called after a block specifying movement along axes is executed. This continues until G67 is issued to cancel a modal call.

Model Macro Call- G66



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G66


basic cnc programming Milling

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