The code to program a G3 counter-clockwise arc on a lathe is: G3X______ Z_______ R_______
Machining.Blog® is a weekly blog focused on manufacturing career development. It features blog articles on the fundamentals of manufacturing for aspiring machinists. Our goal is to create an interest in manufacturing in the USA. Our writer Matthew Schowalter has worked in manufacturing for 24 years, and he covers the topics that matter to someone starting their career in manufacturing.
“The soft skills the machinist uses are the unseen tools in their box and can directly impact the success or failure of a dreamed after machining career.”
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The code to program a G3 counter-clockwise arc on a lathe is: G3X______ Z_______ R_______
I was provided with a few opportunities to talk about my STEM project and my career in several schools. It can be a very rewarding experience to a part of. I never saw myself as a speaker or presenter but with my deep knowledge in the subject, I developed a passion for sharing my experiences in manufacturing.
My first project in technical collage for tool and die making was to make 1-2-3 blocks. I milled the blocks oversize to leave stock for precision grinding. After drilling and tapping the holes in the blocks, we case hardened them. The last process was to precision grind them to size. The grinding process involved both grinding to blocks to size and to a squareness tolerance.
With the shortage of manufacturing workers in the United States we must start to investigate the situation closer to fill the jobs of today and tomorrow. Besides the worker compensation, benefits, work environment, and career development topics that may influence career decisions in manufacturing, we should now look closer into the following topics.
Knowing what features to inspect on machined parts, being aware of machining conditions, and what items and details to deburr can make all the difference in the success of the manufacturing project. By mastering these three items, it will set you apart as a great machinist. Let’s review in detail.
Each program has a program number, that should be different from other program numbers
Each line of code in a CNC program is called a “Block”. It contains G and M codes in it.
The block cannot have two M-codes in it
The ending of a Block has a End-of-Block symbol and it is a semi-colon. (Example: G1X.5; )
While spending much of my career working in the medical machining industry, it was an education into complex part machining. What is being done today in the machining industry is exceptional. Now a highly engineered part can be made compete in one setup in a machine that can turn, mill, drill, hob, broach, thread whirl, and gun drill parts. I have implemented lathes from 5-axis models up to 11-axis models. Here is a breakdown of what it might take to implement advanced lathes.
A few years ago, I learned about the Cardinal Manufacturing business in Eleva-Strum High School in Wisconsin. I was invited to attend their workshop on how they built their program in their technical education department. It was such an inspiration to hear how engaged the students were and how they were learning solid employability skills.
When I got started in machining, I really didn’t know what kind of tools to purchase. There is a vast variety of tooling to use in the shop, from inspection tools to hand tools. While having a limited budget, I had to choose to first buy the tools that I thought that I would use the most. This will vary from machine shop to machine shop often dependent on the type of work that the machinist does. Here is a list of some of the more popular choices for tools:
The workflow varies from shop to shop, but we will breakdown what it might take to process a CNC lathe part.
Machining and Tool & Die Making is what I have spent most of my career doing. There is something to be said for being able to turn a raw piece of material into a complex finished part. Through all my roles in the machine shop environment, I have identified a few soft skills, hard skills, and technical skills to have mastered if you want to be a great machinist.
Gage blocks (also known as gauge blocks) are inspection tools that are used in the machining industry. They typically come in an 81-piece set and the sizes in the set are as follows:
How we are taught how to pronounce a measurement in mathematics class is different from how we pronounce a measurement in machine shop class. In the following chart, I will break down the decimal place pronunciation of 0.123456.
Machining could be a stressful job, but it is as stressful as you make it out to be. For example, there are many things to consider when machining parts, like quality issues, time deadlines, and machining conditions. These items may be stressful when you look at everything at once, but if you form a plan with many individual goals to meet it will add up to the end goal of making a quality part and on time.
So, you have finished your education, either in high school or post-secondary trade school or both, and you are ready to find that machine shop meant for you. Many people do not take compatibility into consideration when completing their job search, but they should.