CNC Programming Tutorials Examples G & M Codes

Program that can be called repeatedly by the control section of another program.

Checking whether the total number of 1 bits in a character is even or odd.

Compensating for the difference in length between the tool assumed during programming and the tool to be used for actual machining.

Manual operation in which a reference tool and the tool to be measured are pressed against a fixed point on the machine, one after the other, and the difference in length between…

Offset value used by the tool length compensation, cutter compensation, and tool offset functions.

Number preceded by the H or D address to specify a tool offset value.

CNC memory used to store tool offset values.

Shifting a specified tool along the controlled axis.

Retracting a tool from the workpiece, allowing the tool to be exchanged during machining (if broken) or the state of machining to be checked, and subsequently repositioning the tool to…

Checking whether the total number of characters in a block (starting immediately after an end–of–block code and ending at the next end–of–block code) is even or odd.

How much do you know about your Haas Mill. Here are series of questions related to Haas mill settings, so you can test how much do you know your Haas…

Fanuc programming example which shows the use of multiple fanuc canned cycle in cnc programming, Following canned cycle are used in this cnc lathe programming example G71 Rough Turning Cycle…

How to Set Up CNC Milling Machine? Before answering this question “How to Setup CNC Milling Machine”, there are many factors that have to be considered. Is the machine a…

CNC machinists who work on CNC lathe/mill machines with ProtoTRAK CNC controls can freely download manuals for their controls from Southwestern Industries Website . canuckmachineworks.ca ProtoTRAK Manuals ProtoTRAK manuals can be…

A full CNC programming example with ID/OD (Turning/Boring operations) for cnc machinists who work on a cnc lathe machine. A must to learn/practice for those who are learning cnc programming….

Although this example drawing looks a bit complex, but it is very easy to program. Before going through this exercise you must fist read circular interpolation articles Circular Interpolation Concepts…

The following image is taken from Sandvik Coromant Turning Tools – General Turning Catalogue. The chart given below shows Feed & Cut Depth for Finish to Rough Machining Sandvik Coromant…

G81 drilling cycle program example which shows how a step block can be drilled economically. The cnc program code is self explanatory, no complex technique is used. G81 Drilling Two…

This Circular Interpolation programming example will show you what is circular interpolation and how to program it. Before going through this exercise you must fist read Circular Interpolation Concepts & Programming articles (listed…

Haas lathe programming example to illustrate the use and programming of Haas G72 Type I Rough Facing Cycle/ G70 Finish Cycle. The above code will also work on cnc lathe…

6th part of Circular Interpolation Concepts & Programming series, this article explains the uses of Circular Interpolation, at end two exercises are given for cnc machinists to program ,apply &…

The brand name for Siemens numerical controls.The name of the organizational unit of Siemens that designs and manufacturers numerical controls.

A machine tool which does primarily turning, but which has live tooling (a spindle on the turret) for doing milling operations. From a software point of view, a turning center…

5nd part of Circular Interpolation Concepts & Programming series, this article explains Use of G90 Absolute Programming G91 Incremental Programming with cnc program examples code explaining both G90/G91 Read Other…

The 4th part of Circular Interpolation Concepts & Programming series explains how cnc program for an arc can be made if arc Radius (R) is not directly given. Read Other Parts…

Haas Programmable Coolant Nozzle Haas CNC vertical and horizontal CNC machining centers (VMCs and HMCs) are available with a Programmable Coolant Nozzle (P-Cool) that automatically directs coolant precisely at the…

Haas Programmable Coolant Nozzle Do not rotate the coolant spigot by hand. Serious motor damage will occur. Using the Programmable Coolant Nozzle Haas Alarm 196 COOLANT SPIGOT FAILURE M34 COOLANT SPIGOT…

Haas M35 COOLANT SPIGOT POSITION UP M35 COOLANT SPIGOT POSITION UP, DECREMENT (-1) M35 decrements the coolant spigot position up one place. Decrementing the spigot position causes the spigot to move…

Haas M34 COOLANT SPIGOT POSITION DOWN M34 COOLANT SPIGOT POSITION DOWN, INCREMENT (+1) M34 Increments the current spigot position down one place. Incrementing the spigot position causes the spigot to move…

Haas M109 INTERACTIVE USER INPUT M109 M code allows a G-code program to place a short prompt (message) on the screen. A macro variable in the range 500 through 599 must be…

Haas M95 Sleep Mode Sleep mode is essentially a long dwell (pause). Sleep mode can be used when the user wants the machine to begin warming itself up so it can…

Haas M89 Through-Spindle Coolant Off M89 is used to turn off the Through the Spindle Coolant (TSC) option. When M89 is called, the spindle will stop and the TSC pump will…

Haas M88 Through-Spindle Coolant On The M88 code is used to turn on the through-spindle coolant (TSC) option, an M89 turns the coolant off. Proper tooling, with a through-hole, must be in…

3rd part of Multi-Series Articles “Circular Interpolation Concepts & Programming”. This part briefly explains how cnc machinists can Calculate and Program circular interpolation G02 G03 with the use of I J…

Hex keys or Allen Keys for CNC Machinists An Allen Key (also known as hex wrench or hex key or Allen wrench) has a hexagonal cross section to fit screw…