CNC MILLING MIRRORING AND SUBPROGRAM

Create the part program for below drawing using subprogram and Mirroring

What is Subprogram?

Subprograms are normal CNC program which are called from a program (normally called Main Program) to add some kind of repeatable machining operations.

Syntax:

Co –ordinate Points:

Program :
G21 G40 G94
G91
G28 X0 Y0 Z0
M03 S1500
G90
G00 X0 Y0 Z5
M98 P1111
M70
M98 P1111
M71
M98 P1111
M80
M98 P1111
M81
G01 Z5
M05
M30

O1111
G00 X10 Y10 Z5
G01 Z-5
G01 X30
G01 Y20
G03 X40 Y30 R10
G01 Y40
G01 X30
G03 X20 Y30 R10
G01 X10
G01 X10 Y10
G01 Z5
G00 X0 Y0
M99

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CNC MILLING LINEAR AND CIRCULAR INTERPOLATION

Create the part program for below showing diagram (linear and circular interpolation)

Diagram with co-ordinate points.

Program:

G21
G98
G90
G28 X0 Z0
G28 Z0
M06 T1
G00 X-35 Y-35 Z5
G01 Z-5 F50
G01 X-35 Y35
G01 X25 Y35
G01 X35 Y25
G01 X35 Y-35
G01 X10 Y-35
G03 X-10 Y-35 R10
G01 X-35 Y-35
G00 Z5
G28 X0 Y0 Z0
M05
M30

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CNC PROGRAM (LINEAR,CIRCULAR AND GROOVING CYCLES)

How to create CNC Program for this Drawing?

(Linear,circular interpolation and Grooving Cycle)

G75 GROOVING CYCLE SYNTAX


G75 R_
G75 X_Z_P_Q_R_F_

R -> Retract distance in mm (x direction)
X -> Grooving diameter in mm
Z -> Grooving Length in mm 
(Length between work zero and end of groove)
P -> Depth of cut in micron(X direction)
Q -> Depth of cut in micron (Z direction)
R -> Relif amount of the tool at the cuuting bottom

F -> Feed rate in mm

Program

G21
G98
M06 T1
M03 S1500
G00 X30 Z0
G71 U1 R0.5
G71 P1 Q2 U0.5 W0.5 F70
N1 G01 X0 Z0 
G03 X15 Z-7.5 R7.5
G01 X15 Z-15
G02 X25 Z-20 R5
G01 X25 Z-35
N2 G01 X30 Z-35
G70 P1 Q2 F10
M05
M06 T2
M03 S750
G00 X30 Z-32
G75 R1
G75 X15 Z-35 P1000 Q250 F30
G00 X30 Z0
M05

M30

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CNC PROGRAM

How to write  CNC  Program for this Drawing?

co- ordinate  points :

Program:

G21
G98
M06 T1
M03 S1500
G00 X30 Z0
G71 U1 R0.5
G71 P1 Q2 U0.5 W0.5 F70
N1 G01 X0 Z0 
G03 X15 Z-7.5 R7.5
G01 X15 Z-15
G02 X25 Z-20 R5
G01 X25 Z-30
N2 G01 X30 Z-35
G70 P1 Q2 F10
M05

M30

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How to create doors and windows in the civil plan?

How to create doors and windows in the civil plan?

Procedure:

1.      Open part1 drawing

2.      Door size is length 3’ and width 9” and window size is 4’in length and 9” in width.

3.      Use line, offset,trim, extend command to draw doors and windows as shown in below video.

See my video how to draw doors and windows narrated step by step for beginners in tamil.

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How to draw simple 2D civil drawing in AutoCAD?

How to draw simple 2D  civil drawing  in AutoCAD?

Procedure:

1.      Open New drawing in imperial mode.

2.      Use units command

3.      Set limits

4.      Use line, offset,trim, extend command to draw plan

See my video how to draw simple 2D drawing  in AutoCAD narrated step by step for beginners.

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How to draw connecting rod in AutoCAD?

Connecting Rod

            A rod connecting two moving parts in a mechanism, especially that between the piston and the crank pin in an engine or pump.

How to draw connecting rod in AutoCAD?

Procedure:

1.      Open New drawing in metric mode.

2.      Set limits

3.      Use line, offset,trim, extend command to draw connecting rod.

4.      Ucs hatch command to represent sectional views.

5.      Use Dimension menu to dimension the drawing.

See my video how to draw a connecting rod in AutoCAD narrated step by step for beginners.

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COORDINATE SYSTEM

COORDINATE SYSTEM

            A coordinate system is a method of identifying the location of a point.

1.    Absolute coordinate system:

Absolute coordinate system uses X,Y and Z axis to establish a point some distance from a common origin

In AutoCad  syntax for  Absolute coordinate system is <X,Y>

Command : Line

From point     :           1,1

To point          :           4,1

To point          :           4,4

To point          :           1,4

To point          :           1,1

Enter.

2Relative rectangular coordinate system:

In AutoCad use relative coordinate system while we know the location of a point in relation to the previous point.

Syntax for Relative rectangular coordinate system is <@ΔX,ΔY>

@ means “From last point”

ΔX means change in X direction

ΔY means change in Y direction

Command : Line

From point     :           1,1 (p1)

To point          :           @3,0 (p2)

To point          :           @0,3 (p3)

To point          :           @0,-3(p4)

To point          :           @0,-3 (p1)

Enter

Polar coordinate system

            In Polar coordinate system each point on a plane is determined by a distance from a reference point and an angle.

In AutoCad  syntax for  polar  coordinate system is (@Length< angle)

Command : Line

From point     :           1,1 (p1)

To point          :           @3<0 (p2)

To point          :           @3<90 (p3)

To point          :           @3<180(p4)

To point          :           @3<270 (p1)

Enter.

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How to draw this simple 2D drawing in AutoCad?

·      Open new drawing using NEW Command.

·      Use metric mode

·      Drawing size is 7.5X6

·      So set limits 15X10 using LIMITS command

·      Set ORTHO and OSNAP ON

·      Draw a horizontal reference line for 7.5mm using LINE command

·       Use OFFSET and TRIM COMMANDS to complete the above drawing.

See above video for detailed explanation.

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