CNC Machining Blog - Tips and Tricks for Machinists

As CNC machinists, we apply our skill, knowledge and experience to manufacture the best looking and most accurate parts that we can. We take a great deal of pride in the products that we produce, and we want others to see that pride in the finished product. But what do we do when we aren’t getting the results that we want? When dimensionally the parts meet blueprint specifications, but the surface finish and overall appearance is less than desirable? When this happens, we need to go back to the basics and ensure that we are using the best machining practices that we know to be correct.

Even the most carefully maintained machining centers eventually become obsolete. When it’s time to replace your older machine, look for one that gives you the maximum dollar value for your investment. 5-axis machining centers are versatile, efficient and flexible, and one can do the work of two or three 3-axis machines.

With that new machine comes an opportunity to upgrade your tooling, as newer machining centers can handle more advanced tooling options. Consider these tooling variables when purchasing a new 5-axis machine.

In this article, I discuss the ins and outs of the two main bed designs for CNC lathe machines: the true slant bed and the flatbed “flying wedge” configurations.

When purchasing a CNC lathe, there are several questions to ask yourself before you begin the process. Some of these questions will be quite obvious: how much axis travel do I need? What size chuck should I look for? How many tool stations are on the turret? What is the spindle bore size? Etc.

However, there are other specifications that are just as important but not always so obvious: what is the maximum swing distance that my work will require? What is the maximum turning diameter necessary for my family of parts? What kind of spindle horsepower and torque will my type of work consume? The first set of questions above is relatively easy to answer, but the second group requires a better understanding of lathes in general.

There are several things to keep in mind when you are in the market for a new 5-axis machining center. To be successful, you must make sure that the machine will fit all of your needs, not just your current one. Often times the purchase of a 5-axis machine is driven by a particular job or part, and sometimes shops fail to consider the other work they could run on the machine. Remember, size does matter.

If you're a regular reader, you're up to speed about the interview I conducted with Mr. Roch, co-founder of Hurco (you can scroll down to this week's video and skip the recap of Parts 1 and 2).

Last week, I posted Part 1 of our History of Hurco video series, where we learned about all of the events—good and bad—that led Mr. Roch to start a business with his boss at the time, Ed Humston. Mr. Roch ended up working in sales for Ed Humston who owned E.L. Humston Company when he quit his job as an industrial engineer at EMPCO in protest of the company president’s, who he believed was making a number of missteps—and his father owned 30 percent of the company, which made the situation even more awkward.