CNC Milling Programming: Fanuc G-Code, Macro B & SwanSoft

Absolute and Incremental Programming G90 and G91

Absolute and Incremental Programming G90 and G91 Examples

In absolute dimension programming, the end-point of the tool movement is determined by its specified co-ordinates in the chosen axial plane (X andY, or X and Z). These can be positive or negative, depending on the direction of movement from the program datum point. Programming in absolute dimensions is established by using the preparatory function G90, and acts modally. For example, if a linear tool movement is required starting from the program datum (XO.OOO YO.OOO) and moving to point P1 with the co-ordinates X= 10, Y = 10 and to a point P2 with the co-ordinates X = 20, Y = 10, the program would look like Program 3G.

N10 G90

N11 G01 X10.000 Y10.000 F100

N12 X20.000

In incremental programming, the end-position of the tool movement is determined by the distances (measured along the axes) of the present tool position relative to the required next position. The coordinates can be positive or negative, depending on the direction of movement from the present tool position. Incremental programming is established by the preparatory function G91, which like G90 acts modally. For the same movement as in the absolute programming example, and again starting from the program datum, the program would look like Program 3H.

NlO G91

Nll GOl XlO.OOO YlO.OOO FlOO

N12 XlO.OOO YO.OOO

Linear Interpolation G01

Linear Interpolation G01 Example

WCS G54, G55

Subprogram (M98−M99)

G43 = positive tool length offset

Circular Interpolation G02 G03

Circular Interpolation G02 and G03 or G12 and G13

Circular Interpolation G12 and G13

Dwell G04

Polar Coordinates Cancellation G15

Cutter Radius Offset and Cutting Direction

Start Up Methods Lead in and Lead Out (With G41, G42 and G40)

G81 > Standard Drilling

G73 - G83 > Peck drilling cycle

G84 G76 and different examples

Hole Pattern examples

Arc Hole Pattern

Polar Coordinate System G15 and G16

Variables

Citation

Limitation

Calculate spindle speed and Feedrate

Geometry square or rectangle and rectangle shapes macro pragramming

Contour Toolpath Rectangle Workpiece

Contour Toolpath Rectangle Workpiece

Contour Toolpath Rectangle Workpiece SwanSoft

Sub Programme G Code

Sub Programme SwanSoft

You can use G54, G55, G56 for each toolpath.

Face Toolpath Rectangle Workpiece 001

Example 003 Face Toolpath Rectangle Workpiece SwanSoft

Example 003 Contour Ramp Milling for Circle Workpiece

Example 003 Contour Ramp Milling for Circle Workpiece SwanSoft

Example 004 Slot Milling

Example 004 Slot Milling SwanSoft

Example 005 Circle Milling

Example 005 Circle Milling SwanSoft

Example 006 Face Toolpath Circle Workpiece 001

Example 006 Face Toolpath Circle Workpiece SwanSoft

Example 007 Trochoidal Cannal Milling SwanSoft

Example 008 Pocket Milling Macro Program Part01

Example 008 Pocket Milling Macro Program Part02

Example 010 Circle Pattern Drilling Operation 01

Example 010 Circle Pattern Drilling Operation 02

Swansoft Interface

Swansoft Interface and Properties

SwanSoft Mode Key Properties

SwanSoft WCS and Tool Offset Properties

SwanSoft Introduction

SwanSoft First Basic Programme

SwanSoft G81 > Standard Drilling

G83 > Peck drilling cycle with G91

Polar Coordinate System G16 with G81

Polar Coordinate System G81 with 2 tools

Face Milling 100*50 Rectangle

Face Toolpath with Mastercam

O1113

(PROGRAM-1111.NC)

G00G17G21G40G80G90

G91G28Z0.

M06T1(40mmFACEMILL)

G00G90G54X-104.Y-60.

S1000M03

G43H1Z25.

Z10.

G1Z0.0F1000

X84.Y-60.

Y-42.86

X-84

Y-25.71

X84.

Y-8.57

X-84

Y8.57

X84.

Y25.71

X-84

Y42.86

X84.

Y60.

X-104

G0Z5.

M05

G91G28Z0.

M30

%

Contour Toolpath for Cylinder

Pocket Toolpath

Four Pocket Toolpath with Rectangle Workpiece

Four Pocket Toolpath with Rectangle Workpiece Summary

Mastercam G Code and SwanSoft