Cnc milling programs

PROFILE MILLING:-

1. To prepare a CNC part program to mill the component as per the

drawing

Assume thickness = 20mm

100

80

40

40

120

50

40

50

50

20

20

SIMULATION MODEL:-

ABSOLUTE MODE(G90)

G90 G00 G54 G17 G21 G95

T01 M06

G43 Z50 M08

S1000 M03

G90 G00 X20 Y20

G01 Z-20 F100

G90 G01 X120 Y20

G90 G01 X160 Y60

G90 G01 X160 Y140

G90 G01 X120 Y190

G90 G01 X70 Y190

G90 G01 X20 Y140

G90 G01 X20 Y20

G01 Z50

G90 G00 X250 Y250

G90 M09

G90 M05

G90 M30


drawing

Assume thickness = 20mm

( 60, 10 )( 10 , 10 )

( 10 , 40 ) ( 20 , 40 )

( 20 , 60 )( 10 , 60 )

( 20 , 70 ) ( 40 , 70 )

( 60, 50 )

x

y

SIMULATION MODEL :-

Absolute mode (G90)

N1 G17 G21 G54 G95

N2 T01 M06

N3 G43 M08

N4 S1000 M03 Z50

N5 G90 G00 X10 Y10

N6 G01 Z-20 F100

N7 G90 G01 X60 Y10

N8 G90 G01 X60 Y50

N9 G90 G01 X40 Y70

N11 G90 G01 X20 Y70

N12 G90 G01 X10 Y60

N13 G90 G01 X20 Y60

N14 G90 G01 X20 Y40

N15 G90 G01 X10 Y40

N16 G90 G01 X10 Y10

N17 G90 G00 Z50

N18 G00 X100 Y100 Z50

N19 M09

N20 M05

N21 M30

PART PROGRAM FOR CIRCULAR INTERPOLATION AND SIMULATE

G02/03 Circular interpolation

Format N__ G02/03 X__ Y__Z__ I__ J__K__ F__ using the arc center

OR N__ G02/03 X__ Y__Z__ R__ F__ using the arc radius G02 moves along a CW arc G03 moves along a CCW arc Arc center The arc center is specified by addresses I, J and K. I, J and K are the X, Y and Z co-ordinates of

the arc center with reference to the arc start point.

Y

Arc

start

Arc end

- I - J

Arc center

X

I = X coord. of center - X coord. of start point J = Y coord. of center - Y coord. of start point K = Z coord. of center - Z coord. of start point I, J and K must be written with their signs.

RADIUS METHOD


drawing

Assume thickness = 20 mm

10

R20

20

20

2030 20

60

60

R20

SIMULATION MODEL:-

ABSOLUTE MODE (G90)

N1 G17 G21 G54 G95

N2 T01 M06 G43 M08

N3 S1000 M03 Z50

N4 G90 G00 X30 Y10

N5 G90 Z-22 F50

N6 G01 X50 Y10

N7 G01 X50 Y30

N8 G01 X70 Y30

N9 G01 X70 Y10

N10 G01 X90 Y10

N11 G03 X110 Y30 R20 F10

N12 G01 X110 Y90

N13 G03 X90 Y110 R20 F10

N14 G01 X30 Y110

N15 G03 X10 Y90 R20 F10

N16 G01 X10 Y30

N17 G03 X30 Y10 R20 F10

N18 G90 G00 Z50

N19 G90 G00 X110 Y110 F50

N20 M05

N21 M09

N22 M30

RADIUS METHOD


drawing

40 40 40 2020

2040

4040

20

20

SIMULATION MODEL:-

ABSOLUTE MODE (G90)

N1 G17 G21 G54 G95

N2 T01 M06 G43 M08

N3 S1000 M03 Z50

N4 G90 G00 X40 Y20

N5 G90 Z-22 F50

N6 G01 X80 Y20

N7 G02 X120 Y20 R20 F10

N8 G01 X160 Y20

N9 G03 X180 Y40 R20 F10

N10 G01 X180 Y80

N11 G02 X180 Y120 R20 F10

N12 G01 X180 Y160

N13 G03 X160 Y180 R20 F10

N14 G01 X120 Y180

N15 G02 X80 Y180 R20 F10

N16 G01 X40 Y180

N17 G03 X20 Y160 R20 F10

N18 G01 X20 Y120

N19 G02 X20 Y80 R20 F10

N20 G01 X20 Y40

N21 G03 X40 Y20 R20

N22 G90 G01 Z50

N23 G90 G00 X250 Y250

N24 M09

N25 M05

N26 M30

I, J, K METHOD


drawing

2030 30 30 30 20

R30

2030

3030

3020

20

SIMULATION MODEL:-

ABSOLUTE MODE (G90)

N1 G17 G21 G54 G95

N2 T01 M06 G43 M08

N3 S1000 M03 Z50

N4 G00 G90 X50 Y50

N5 G90 Z-20 F50

N6 G90 G03 X110 Y50 I30 J00

N7 G90 G03 X110 Y110 I0 J30

N8 G90 G03 X50 Y110 I-30 J00

N9 G90 X50 Y50 I0 J-30

N10 G90 G01 Z50

N11 G90 G00 X150 Y150

N12 M05

N13 M09

N14 M30

I, J, K METHOD


drawing

60

6060 O

60

6020

All the dimensions are in mm

SIMULATION MODEL:-

ABSOLUTE MODE(G90)

N1 G17 G21 G54 G95

N2 T01 M06 G43 M08

N3 S1000 M03 Z50

N4 G00 G90 X30 Y60

N5 G90 Z-20 F50

N6 G90 G03 X90 Y60 I30 J00

N7 G90 G03 X30 Y60 I-30 J00

N8 G90 G01 Z50

N9 G90 G00 X150 Y150

N10 M05

N11 M09

N12 M30

SUBROUTINE

General rules:

1. You can call subroutines (within the same program) and subprograms (separate file on disk)

using either M98 or M97 using the same syntax.

2. A subprogram can start with either N or O. Both codes are supported as a sub program

number.

3. Repetitions can be given using the L word or as the first digits of the P word (last four digits

are always program number).

4. If a subroutine number is missing in program the simulator will attempt to find a disk file

with the format O####.cnc in the same folder as the main program or in the user defined

CNC folder.

5. A subprogram can also be called with the alternative syntax M98 “mySubProgram.cnc” L…

6. Return from subprograms and subroutines can be done with either M17 or M99.

7. The L word is optional. If omitted, one call will be executed only.

Example program

Single call to subroutine, no repeats

M98 P1000

O1000

M17 (or M99)

Standard call to subroutine, repeating 4 times

M98 P1000 L4

Call to subroutine on line number 555, repeating 2 times

N100 M98 P555 L2

N555 ….

N565 M17 (or M99)

Call to subroutine with repeats in the P address

M98 P51001 (Call O1001 five times)

O1001

M17 (or M99)

Calling subprograms

If a subroutine within the same program is missing, the simulator will look for a separate program on disk.

M98 O1099 L2

If there is no O1099 or N1099 in the program, the block above will call subprogram O1099.cnc

File name syntax

M98 “DrillHoles.cnc” L2

The block above will look for subprogram DrillHoles.cnc in the same folder as the main program, or in the user

defined CNC programs folder.

Please remember to end all subprograms with either M17 or M99 for execution to continue in the main program.

SUBROUTINE (DIRECT METHOD)

7. Write a milling program for a given sketch using G-code and M-codes.

60 90 60

6090

60

O60

15 15

All dimensions are in mm

SIMULATION MODEL:-

ABSOLUTE MODE (G90)

G17 G21 G54 G95

T01 M06

G43 M08 Z50

S1000 M03

G90 G00 X45 Y60

M98 P10055

G90 G00 X135 Y60

M98 P10055

G90 G00 X45 Y150

M98 P10055

G90 G00 X135 Y150

M98 P10055

G90 G00 Z50

G90 G00 X250 Y250

M09

M05

M30

O55

G01 Z-10 F50

G91 G03 X30 Y0 R15

G91 G03 X-30 Y00 R15

G91 G00 Z50

M99


25

55

90

120

150

25

55

90

120

150

50


SIMULATIONMODEL :-

ABSOLUTE PROGRAMMING(G90)

G17 G21 G54 G95

T01 M06

G43 M08

S1000 M03 Z60

G90 G00 X32.5 Y32.5

M98 P10055

G90 G00 X97.5 Y32.5

M98 P10055

G90 G00 X97.5 Y97.5

M98 P10055

G90 G00 X32.5 Y97.5

M98 P10055

G90 Z50

M09

M05

M30

O55

G01 Z-52 F50

G91 G01 X15 Y0

G91 G01 X0 Y15

G91 G01 X-15 Y0

G91 G01 X0 Y-15

G91 Z60

M99


20 2020 30 20 30 20

2030

2030

20

ALL DIMENSION ARE IN MM

Simulation:-

ABSOLUTE MODE (G90)

G17 G21 G54 G95

T01 M06

G43 M08 Z50

S1000 M03

G90 G00 X27.5 Y27.5

M98 P10055

G90 G00 X77.5 Y27.5

M98 P10055

G90 G00 X77.5 Y77.5

M98 P10055

G90 G00 X27.5 Y77.5

M98 P10055

G90 G01 Z50

G90 G00 X200 Y200

M09

M05

M30

O55

G01 Z-20 F50

G91 G01 X15 Y0

G91 G01 X-7.5 Y15

G91 G01 X-7.5 Y-15

G90 Z50

M99

SUBROUTINE (REPETITIVE METHOD)


60 90 60

6090

60

O60

15 15

ALL DIMENSION ARE IN MM

SIMULATIONMODEL :-

ABSOLUTE MODE(G90)

G17 G21 G54 G95

T01 M06

G43 M08 Z50

S1000 M03

G90 G00 X45 Y60

M98 P30055

G00 Z50

G90 G00 X135 Y60

M98 P30055

G00 Z50

G90 G00 X45 Y150

M98 P30055

G00 Z50

G90 G00 X135 Y150

M98 P30055

G00 Z50

G90 G00 Z50

G90 G00 X250 Y250

M09

M05

M30

O55

G01 Z-5 F50

G91 G03 X30 Y0 R15

G91 G03 X-30 Y00 R15

M99


15

30

60

60

20 20

2020


SIMULATION MODEL:-

ABSOLUTE MODE (G90)

G17 G21 G54 G95

T01 M06

G43 M08 Z50

S1000 M03

G90 X42.5 Y42.5

M98 P30055

G90 G00 Z50

G90 G00 X500 Y500

M09

M05

M30

O55 (SUB PROGRAM)

G01 Z-5 F50

G91 G01 X15 Y00

G91 G01 X00 Y15

G91 G01 X-15 Y00

G91 G01 X00 Y-15

G91 G01 X-7.5 Y-7.5

G91 G01 X30 Y00

G91 G01 X00 Y30

G91 G01 X-30 Y00

G91 G01 X00 Y-30

G91 G01 X-7.5 Y-7.5

G91 G01 X45 Y00

G91 G01 X00 Y45

G91 G01 X-45 Y00

G91 G01 X00 Y-45

G91 Z5

G90 X42.5 Y42.5

G91 Z-5

M99

12. Write a milling program for a given sketch using G-code and M-codes. (F0URTH

QUADRANT OPERATION)


20 60 20

2060

20

R20


SIMULATION MODEL: -

ABSOLUTE MODE: -

G54 G17 G21 G94

T01 M06

G43 M08 Z50

S1000 M03

G90 G00 X50 Y00

G90 G01 Z-20 F100

G01 X50 Y30

G03 X30 Y50 I-20 J0

G01 X-30 Y50

G02 X-50 Y30 I-20 J0

G01 X-50 Y-30

G02 X-30 Y-50 I0 J-20

G01 X30 Y-50

G02 X50 Y-30 I20 J0

G01 X50 Y30

G90 G01 Z50

G90 G00 X-20 Y00

G01 Z-20

G02 X20 Y00 R20

G02 X-20 Y00 R20

G90 G01 Z50

G90 G00 X200 Y200

M09

M05

M30

MIRROR ABOUT “X” AXIS

13. Write a milling program for a given sketch using G-code and M-codes WITH MIRROR

ING.

30

X X

100

2020

60

60

20

Y

Y

20

15


SIMULATON MODEL:-

MIRROR ABOUT “X” AXIS

O1234

G17 G90 G21 G54 G94

T01 M06

G43 M08 Z50

S1000 M03

M98 P10055

M70

M98 P10055

M81

Z50

G90 G00 X200 Y200

M09

M05

M30

O55

G0 X35 Y35

G01 Z-10 F100

G91 X30 Y00

G91 X00 Y30

G91 X-30 Y00

G91 X00 Y-30

G0 Z50

G90 X0 Y0

M99

MIRROR ABOUT “Y” AXIS


ING.

30

X X

100

2020

60

60

20

Y

Y

20

15


SIMULATION MODEL:-

MIRROR ABOUT “Y” AXIS

O1234

G17 G90 G21 G54 G94

N10 T01 M06

G90 G00 G54 X0.0 Y0. S1000 M03

G43 M08 Z50

M98 P10055

M71

M98 P10055

M81

M05

Z10

G00 X200 Y200

M30

O55

G0 X35 Y35

G01 Z-10 F100

G91 X30 Y00

G91 X00 Y30

G91 X-30 Y00

G91 X00 Y-30

G0 Z50

G90 X0 Y0

M99


ING.


R20

R20

10 10

2010

0

20 20

4040

All the dimensions are in mm.

SIMULATION MODEL: -

USING G90 AND G91

G54 G17 G21 G94

T01 M06

G43 M08 Z50

S1000 M03

M98 P10099

M71

M98 P10099

M80

G00 Z50

G00 X500 Y500

M09

M05

M30

O99 (SUB PROGRAM)

G90 X0 Y40

G01 Z-20 F100

G91 G01 Y40 X20

G91 G01 X20 Y00

G91 G03 X20 Y20 R20

G91 G02 X20 Y20 R20

G91 G01 X10 Y00

G91 G01 X10 Y-20

G91 G01 X00 Y-100

G91 G01 X-120 Y0

G00 Z50

G90 G00 X0 Y0

M99

Cnc milling programs

Engineering

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