Computer Numerical Control (CNC) machining is a manufacturing process in which pre-programmed computer software dictates the movement of factory tools and machinery. The process can be used to control a range of complex machinery, from grinders and lathes to mills and CNC routers. With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts.
The CNC process runs in contrast to — and thereby supersedes — the limitations of manual control, where live operators are needed to prompt and guide the commands of machining tools via levers, buttons and wheels. To the onlooker, a computer numerical control system might resemble a regular set of computer components, but the software programs and consoles employed in CNC machining distinguish it from all other forms of computation.
If you’re interested in utilizing CNC manufacturing to produce various products, find out more about how CNC machining and CNC programming works. You might also want to know about the main types of CNC machinery and the kind of work it can do to see if it can meet your needs.
When a CNC system is activated, the desired cuts are programmed into the software and dictated to corresponding tools and machinery, which carry out the dimensional tasks as specified, much like a robot.
In CNC programming, the code generator within the numerical system will often assume mechanisms are flawless, despite the possibility of errors, which is greater whenever a CNC machine is directed to cut in more than one direction simultaneously. The placement of a tool in a numerical control system is outlined by a series of inputs known as the part program.
With a numerical control machine, programs are inputted via punch cards. By contrast, the programs for CNC machines are fed to computers through small keyboards. CNC programming is retained in a computer’s memory. The code itself is written and edited by programmers. Therefore, CNC systems offer far more expansive computational capacity. Best of all, CNC systems are by no means static since newer prompts can be added to pre-existing programs through revised code.
In CNC manufacturing, machines are operated via numerical control, wherein a software program is designated to control an object. The language behind CNC machining is alternately referred to as G-code, and it’s written to control the various behaviors of a corresponding machine, such as the speed, feed rate and coordination.
Basically, CNC machining makes it possible to pre-program the speed and position of machine tool functions and run them via software in repetitive, predictable cycles, all with little involvement from human operators. In the CNC machining process, a 2D or 3D CAD drawing is conceived, which is then translated to computer code for the CNC system to execute. After the program is inputted, the operator gives it a trial run to ensure no mistakes are present in the coding.
Due to these capabilities, the process has been adopted across all corners of the manufacturing sector, and CNC manufacturing is especially vital in the areas of metal and plastic production. Find out more about the types of machining systems used and how CNC machine programming fully automates CNC manufacturing below:
During the CNC manufacturing process, position control is determined through an open-loop or closed-loop system. With the former, the signaling runs in a single direction between the CNC controller and motor. With a closed-loop system, the controller is capable of receiving feedback, which makes error correction possible. Thus, a closed-loop system can rectify irregularities in velocity and position.
In CNC machining, movement is usually directed across X and Y axes. The tool, in turn, is positioned and guided via stepper or servo motors, which replicate exact movements as determined by the G-code. If the force and speed are minimal, the process can be run via open-loop control. For everything else, closed-loop control is necessary to ensure the speed, consistency and accuracy required for industrial applications, such as metalwork.
In today’s CNC protocols, the production of parts via pre-programmed software is mostly automated. The dimensions for a given part are set into place with computer-aided design (CAD) software and then converted into an actual finished product with computer-aided manufacturing (CAM) software.
Any given workpiece could necessitate a variety of machine tools, such as drills and cutters. In order to accommodate these needs, many of today’s machines combine several different functions into one cell.
Alternately, an installation might consist of several machines and a set of robotic hands that transfer parts from one application to another, but with everything controlled by the same program. Regardless of the setup, the CNC fabrication process allows for consistency in parts production that would be difficult, if not impossible, to replicate manually.
CNC machining plays a vital role in the evolving world of modern manufacturing. But what is CNC, exactly? How does it play a role in the manufacturing industry, and what do CNC machinists do? Even more so, how can aspiring CNC machinists successfully prepare for – and land – a job in CNC machining today? As a leading manufacturing and machining school in Connecticut, Goodwin College breaks down all the details below, starting with the basics:
What is CNC?
CNC stands for Computerized Numerical Control. It is a computerized manufacturing process in which pre-programmed software and code controls the movement of production equipment. CNC machining controls a range of complex machinery, such as grinders, lathes, and turning mills, all of which are used to cut, shape, and create different parts and prototypes. On the day to day, CNC machinists combine elements of mechanical design, technical drawings, mathematics, and computer programming skills to produce a variety of metal and plastic parts. CNC operators can take a sheet of metal and turn it into a critical airplane or automobile part.
What is a CNC Machine?
Computer Numerical Control machines are automated machines, which are operated by computers executing pre-programmed sequences of controlled commands. CNC machines are essentially the opposite of “old-school” devices that are manually controlled by hand wheels or levers, or mechanically automated by cams alone. Today’s modern CNC machines understand and function using CNC machining language – called G-code – which tells them precise measurements for production, like feed rate, speed, location, and coordination.
Today’s design and mechanical parts for CNC systems are highly automated – unlike the old, dangerous, factory machines you’d think of back in the day. The parts’ mechanical dimensions are defined using computer-aided design (CAD) software, and then translated into manufacturing directives by computer-aided manufacturing (CAM) software. Therefore, it is important to have knowledgeable CNC machinists and programmers in the industry to operate this high-tech machinery.
The Importance of CNC Machining
Manufacturers in Connecticut are leaders in making vital products in the industry, such as jet engines, helicopters, and submarines. And, thanks to recent advancements in technology, gone are the days of gritty factory life. Workers today use their machining skills in a clean, professional setting with advanced and cutting-edge technology.
Getting Started
Those pursuing CNC operator careers enjoy working in a hands-on, never-a-dull-moment, growing field.
With proper CNC machining training, machinists and operators help create a wide variety of manufactured products, thereby playing a crucial role in Connecticut’s booming manufacturing industry and overall economy. Skilled CNC Machinists see a product through each phase of its creation, from the start of an initial concept to design, to code and then to the finished product. In this way, CNC machining is not just a typical manufacturing job; it is a hands-on, creative, valuable career path for innovators who like to see the lifecycle of their work.
What is it like to be a CNC Machinist?
Typical daily duties for CNC operators may include:
For aspiring machinists looking to start an exciting career in this growing field, earning an associate degree and/or certificate from a reputable manufacturing school is a great investment in the future! For those looking to become a CNC machinist in Connecticut, Goodwin College is recognized for our various CNC programs.
Whether at the certificate or degree level, our CNC machine training gives students a thorough understanding of the manufacturing processes, materials, and manufacturing mathematics. You’ll also gain competence in technical drawings, specifications, and computer-aided machining. Perhaps most importantly, you’ll also acquire practical experience with modern CNC technologies.
Goodwin College combines classroom education with hands-on experience and training. Students are taught on our new CNC 3-axis milling and turning machines, to provide the skills, know-how and experience needed to be successful in the industry. Thanks to the extend of CNC operator training, students also walk away with an understanding of advanced Mastercam skills needed for programming tool location, motion, and feeds and speeds.
Upon completion of these programs, students are ready to take on the National Institute for Metalworking Skills (NIMS) credential to become a CNC operator.
Goodwin College’s competitive CNC operator school is designed to get students certified and working in the field in a short period of time, on a flexible schedule. No matter your personal obligations or current work situation, Goodwin has a manufacturing program for your busy lifestyle. You do not have to put your life on hold to pursue the degree of your dreams.
Want to learn more about CNC operator careers, or about Goodwin’s career-focused CNC training programs? Call Goodwin College today at 1-800-889-3282 to learn more.
Goodwin University is a nonprofit institution of higher education and is accredited by the New England Commission of Higher Education (NECHE), formerly known as the New England Association of Schools and Colleges (NEASC). Goodwin University was founded in 1999, with the goal of serving a diverse student population with career-focused degree programs that lead to strong employment outcomes.