COMMAND CODE for CNC MILLING

To move the axis of a CNC Mill machines, we need a command code known as G CODE.

There are three basic movements of the G Code

1. G00 = Rapid positioning

Tool move linear into programmed position of the work piece with rapid transverse rate (maximal speed).

Movement positioning has 2 methods depend on machine maker.

• use linier interpolation, many axis move together.
• non linier interpolation, axis moving one by one.

2. G01 = Linear move

Tool move linear into programmed point position with selected feed rate in Fxxx

3. G02 /G03 = Circular Interpolation

Tool move along a circular arc to the programmed position with feed rate specified in Fxxx.

G02 = making arc with clock wise direction (CW)

G03 = making arc with counter clock wise direction (CCW)

Combination of the three basic movement shape all the contours on CNC Mill machines.

For a simple contour we can write the G CODE manually.

But for a complex contour, we need software that can produce the G Code. They are called CAM software.

This simulation shows the G CODE and movements that occur.

There are lot of CAM Software for example MasterCAM, UniGraphic, Catia, CAM Tool, Cimatron, HyperMill, Delcam PowerMill etc.