G28 is an important G-code command of CNC machines, called “return to reference point” or “return to home”. When G28 is given in the program, the machine axes (X, Y, Z) automatically return to the machine’s home, that is, the first reference point. This command is typically used at the beginning of a program, before…
Various G-Codes are used to control feed rates in CNC machines. Among them, G95 Feed Per Revolution is an important command, which controls the feed rate per spindle revolution.This code links the feed rate to the spindle speed, and this is the basis for a better surface finish and longer tool life. G95 stands for…
G21 is a G-Code command that tells the CNC machine that all positions, distances, and feed rates should now be understood in metric units (millimeters). When G21 is used, the CNC machine understands all relevant linear measurements in millimeters (mm). G21 = Metric mode (millimeters, and feeds in mm/min or mm/rev)G20 = Inch mode (its…
The use of coolant is very important for the safety of the tool (Tool Life), and for the best cutting while working on the machine. The correct use of coolant has a direct impact on the life of the tool, surface finish and machine performance.During machining, a lot of heat is generated due to friction…
One of the codes that must be learned before working on a CNC machine is G00. This command moves the tool from one point to another very quickly. In this, the tool does not cut, but only changes its positioning. In CNC programming, this command is used to move the tool from one point to…
Starting diameter: Ø50 mm Taper end diameter: Ø30 mm Taper length: 40 mm Related: Turning & Arc Interpolation (G03) Main Machining Operations (N50 – N80) Program Sequence This is a simple and clean program for CNC Lathe. It moves the tool to the position exactly in front of the workpiece, then performs Facing and a…
This CNC program is designed for a drilling operation on a workpiece, using a peck-drilling cycle to create a 60 mm deep hole along the Z-axis. O0001 — G74 PECK DRILLING EXAMPLEN10 G21 G99 — Metric units; feed in mm/revolutionN20 T0505 M06 — Select drill tool, tool offset 05N30 G97 S800 M03 — Spindle ONN40…
G28 is an important reference command in CNC machines. It returns the machine to its Home Reference Point. When a program finishes or a tool change is required, the G28 command moves all or selected axes (X, Y, Z) back to their original safe position. Operators also call this process a “zero return.” What is…
G75 is an excellent CNC group cycle, one of the best advantages of which is that this command does not require repeated code writing, but rather contains complete logic in a single command. This code is a great way to save time, protect the tool, and achieve better quality. G75 is typically used for radial…
The G72 Facing Cycle is an important programming command that is widely used in CNC lathes. This command smooths the surface of the workpiece by removing material to a certain depth. G72 is a very useful facing cycle, especially for circular profiles and medium-hard materials. It completes the facing operation by repeating the programmed tool…
Thread cutting on a CNC lathe is extremely important, and G76 is a multi-pass and widely used threading cycle. It is considered one of the precision machining operations.The G76 cycle is considered an ideal choice for not only external but also internal finish quality threading.With the help of the G76 threading cycle, the machine operator…
When we work on metal to give it a specific shape, we perform most operations using straight-line movements (linear interpolation). We use G-codes for these movements. When the design includes bends, circles, or arcs, we use G02 and G03 instead. It is very important for any machinist to understand these codes so that it is…
In the world of CNC (Computer Numerical Control) machining, G-codes are the language that tells a machine exactly how to move. While there are hundreds of codes, the “Big Four”—G00, G01, G02, and G03—handle about 90% of all motion commands. Understanding these is the difference between a perfectly machined part and a broken tool. 1….
Mastering G-code is like learning the grammar of manufacturing. While there are hundreds of codes, a small core group does 90% of the heavy lifting in CNC programming. Here is a breakdown of the top 20 G-codes every programmer should have memorized, categorized by their function. 1. Motion Codes (The “Big Three”) These codes tell…
CNC machines operate with the help of special programming languages that tell the machine what to do, where to move, and how to perform operations. Among these languages, G-Code and M-Code are the most important and commonly used. Many beginners in CNC machining often ask:What is the difference between G-Code and M-Code?Although both are essential, they serve very different purposes in CNC…
For this example, we’ll program a basic stepped shaft on a CNC lathe using Fanuc-style G-code. Assume the following specifications: This is a complete, self-contained program. Note that actual code may vary slightly by machine control (e.g., Fanuc, Haas), so test in simulation first. The roughing uses G71 (stock removal cycle), and finishing uses G70…
CNC programmers rely heavily on G-codes to control the movements and operations of a machine. G-codes, or “preparatory codes,” instruct the machine on actions such as linear and circular motion, tool changes, spindle control, and coolant activation. Among the most essential G-codes are G00 for rapid positioning, G01 for linear interpolation, G02 and G03 for…
G-code, short for “Geometric Code,” is the standard programming language used to control Computer Numerical Control (CNC) machines, such as mills, lathes, routers, and even 3D printers. Developed in the 1950s and standardized as RS-274 (now ISO 6983), it provides precise instructions for tool movement, speed, and machine functions. While modern CAD/CAM software often generates…
G-codes and M-codes form the foundation of CNC (Computer Numerical Control) programming, a language that instructs CNC machines like mills, lathes, and routers on how to move and operate. Developed in the 1950s at MIT and standardized as RS-274 (now ISO 6983), G-code primarily controls geometry—tool paths, movements, and coordinates—while M-code handles miscellaneous or machine…