CNC Programming Basics

The end of the World War II has made many people realize that they require to manufacture various goods at a fast pace and that too at an affordable price. This introduced the trend of mass production. These events also resulted into the introduction of Numeric Control or NC machines and thereafter gave way to a new concept of computer numeric control or CNC programming. The CNC programming: CNC programming utilizes a special code that very similar to the structure of BASIC.

Hence, if you have the slightest idea of how to construct a simple counting program, you can claim that you are aware of a G-Code and the way it looks like. However, there are still certain things you need to understand prior to starting off with the encoding instructions. The first most important thing that you require to do is to allot different values for every variable. These variables are the reference point for the axes and the programmable motion directions or axes.

Any value that you allot to the variables would define the CNC machine movement. CNC programming is not all that difficult! Another important thing that you need to take into consideration is the CNC machine accessories. Most machines possess accessories that are specially created to increase the capabilities of the basic device. However, the use of these accessories needs you to incorporate the coding system. This indicates that if you desire to get an efficient machine, you need to know all about the machine.

This way, you would become efficient in using CNC programming.

Reading codes: You need to create a subprogram that would include the mathematics. Thereafter, this step will facilitate the machine to calculate all the requisite variables and thereafter effectively operate without the need to ask the operator about the limitations. In order to give you an indication of what these codes look like, here is an instance taken from wikipedia. #100=3 (bolt circle radius) #101=10 (how many holes) #102=0 (x position of ctr of bolthole) #103=0 (y position of ctr of bolthole) #104=0 (angle of first hole Tool call, spindle speed, and offset pickup, etc G43 in some cases (tool length pickup) G81 (drill cycle) call sub program N50 G80 M30 Subprogram N100 #105=((COS#104)*#100) (x location) #106=((SIN#104)*#100) (y location) x#105 y#106 (remember your G81 code is modal) If #100 GT 360 goto N50 #100=(#100+(360/#101)) Goto 100: In the code mentioned above, the CNC machine is a drill.

The subprogram rules the machine cycle. This is a very simple code. Other CNC machines would require including the maximum RPM to the coding. A simple way to facilitate CNC programming is to use CAM. This system will make the programming easy. CAM is quite similar to BASIC. Another CNC programming enhancement process was the logical commands or parametric programs. The programs were specially designed to make lengthy codes, shorter and user friendly.

However, these codes do not use the same language all the time. The sequence and language of the code usually vary on the type of machine that you would be working on. The CNC programming operator need to have proper knowledge of what the machine is capable of doing or what it was directed to do prior to attempting to program it. You also need to imagine the machine carrying out the tasks that you want it to do. However, you don’t require to be a mathematics expert or CNC programming wizard.

All you require to know is what your machine can do and would you like to do.

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