Peter Zelinski

Peter Zelinski has been a writer and editor for Modern Machine Shop for more than a decade. One of the aspects of this work that he enjoys the most is visiting machining facilities to learn about the manufacturing technology, systems and strategies they have adopted, and the successes they’ve realized as a result. Pete earned his degree in mechanical engineering from the University of Cincinnati, and he first learned about machining by running and programming machine tools in a metalworking laboratory within GE Aircraft Engines. Follow Pete on Twitter at Z_Axis_MMS.

Posted by: Peter Zelinski 30. December 2015

Positive Surprises This Year and Next

Many readers enjoyed the glimpse of how machining centers are used at Taylor Guitars.

I’ve been looking back over the content Modern Machine Shop produced in 2015. A few thoughts related to surprises within this work:

  1. I worked with "The Edge Factor" to produce two videos involving music-industry manufacturers in southern California. This video at DW Drums went as planned, and I thought a lot of good information came out in the talk. Meanwhile, this video at Taylor Guitars did not go as planned, because (for a couple of reasons) I changed my mind about what I wanted us to film, and changed our plans the evening before filming. Because I was close enough to both projects to know which one proceeded calmly and which one was more seat-of-the-pants, I felt better about the DW Drums film. What I did not anticipate is what actually happened, which is that the Taylor video elicited just as much positive response, and in fact probably garnered the more positive response of the two in the initial days just after these videos were posted.
  2. To me, perhaps the most interesting article we published this year is this short item by Mark Albert speculating on the ways that the experience of production might change as people and pieces of equipment all become more digitally interconnected. Mark anticipates the surprises we might see. A capacity he has, and one we all should cultivate, is the ability to step outside the moment in order to imagine where this moment might take us.
  3. The biggest surprise of all for me in 2015 was the spinning off of Additive Manufacturing into its own full-size magazine. When the year began, we did not know we would be doing this. And when we created the new AM website, I would not have guessed that we would find so much to report on related to this topic that we would end up posting new content every working day from the launch of the site through the end of the year.

My wish for you in the coming year is all of the above. That is: Wishing you the chance to change up something you’ve planned in order to set it free it into something better, wishing you insights that transport you beyond the moment you find yourself in, and hoping also that the coming year includes a large positive surprise for you that opens up a healthy new avenue to explore.

Posted by: Peter Zelinski 21. December 2015

Modern Machine Shop Featured on “Making Chips” Podcast

I had the pleasure recently of sitting for an interview with Jim Carr and Jason Zenger, hosts of the “Making Chips” podcast. Our conversation appears in episode 49 of this show.

Actually, we did multiple interviews. We also taped a second conversation that will appear in a later episode.

Making Chips is, I believe, the only podcast devoted to metalworking. Both of the hosts of the show are in this business, Mr. Carr as a shop owner and Mr. Zenger as the owner of an industrial supply company selling tooling. Together they launched the podcast back in January, and they’ve remained committed to regularly posting episodes, most of them featuring interviewee guests. The show recently posted its 50th episode—no small accomplishment.

As with a typical podcast, all the show’s episodes can be heard through apps from the likes of iTunes and Stitcher. Episodes are also all available as free downloads on the show’s website.

In the posted episode including me, we focused on characteristics of metalworking business leaders. If I am correctly remembering the gist of our conversation after this, the future episode will focus largely on additive manufacturing.

Let me know if you’re listening? That is, let me know if you are someone who received the episode before you read about it here, because you are a subscriber to the show. In my experience with podcasts, people either are not engaged with this medium or they love it, with few occupying positions in between. I am in the latter category—I listen to podcasts all the time. Part of the pleasure of the "Making Chips" appearance was therefore the simple fun of seeing an episode produced from the inside. In fact, if you have recommendations for other podcasts I should consider following, I’d be interested in that as well.

Posted by: Peter Zelinski 8. December 2015

How to Succeed in a Machining Career

Interest is high in CNC machining as a career path. At least, it is far higher than it once was. I’ve seen this repeatedly in recent facilities I’ve visited. Illinois manufacturing association TMA came close to ending its training efforts altogether in recent years, but now has a newly opened instructional facility seeing surging enrollment. And across the border in Wisconsin, the impressive Moraine Park Technical College has a healthy machining program (to the extent that this institution’s struggle now is to draw students into remaining underserved fields, such as HVAC). In the metalworking industry, outreach efforts aimed at attracting young people seem to have had an impact.

But one thing these outreach efforts often lack is a specific way forward. If a young person becomes interested in machining—say, if a teenager in high school or junior high has this interest—then what should he or she prepare to do to follow this interest and proceed into this career?

I think this document created by Matt Schowalter, who is a machining group lead at Gauthier Biomedical in Grafton, Wisconsin, serves as a useful complement to that outreach. In it, Mr. Schowalter describes his own machining career path and the steps he took, and he advises aspiring machining professionals in the steps they might take to follow a similar path. He created the document entirely out of his enthusiasm for his work and his desire to help others thrive in the same career. The link above is to a PDF download, or find a version he posted on LinkedIn.

Posted by: Peter Zelinski 1. December 2015

Know Your Control

Daniel Miller is the instructor at a new Heidenhain training facility where students receive hands-on instruction with company’s CNC on a five-axis machining center.

Soon, many builders selling machine tools with a Heidenhain control will offer vouchers for a week of free CNC instruction at the control maker’s Chicago-area U.S. headquarters. This voucher program is in development, the company says, and an important element of the program is already in place. I recently paid a visit to the company’s newly opened training facility in Schaumburg, Illinois, where students acquire hands-on experience with the control by running a five-axis Hermle machining center.

Getting new users familiar and comfortable with the CNC is only part of the goal of the company’s training, Heidenhain says. The company’s CNC is unfamiliar to many shops, so helping new users quickly adapt is certainly a benefit. However, the much larger benefit the company sees is in making sure that users are aware of the extent of what the control can do.

Leaving powerful control capabilities unused is too common, says company CNC training instructor Daniel Miller. He says he recently visited a shop machining blisks where he observed that the shop was accepting an unnecessarily light depth of cut because of chatter. He taught staff members there how to use the Active Chatter Control (ACC) feature of their CNC, which manipulates the machine’s feed drives to produce damping, thereby reducing the effect of chatter at frequencies up to 100 Hz. Thanks to this feature, the shop was able to increase its depth of cut and increase its productivity. Heidenhain did not make a new sale in order to bring about this success, because it involved applying a control capability the shop already owned.

A similar recent story involved a mold shop owner, Mr. Miller says. The shop owner recognized the value of ACC when he happened to be walking by a live demonstration of it at a trade show. The difference in cutting performance when the capability was turned on and off was audible, and he followed the sound to investigate. In his case, he did not have this capability on his own machine, but the shop was a Heidenhain user. He had the capability added as soon as understood the value.

Mr. Miller says a similar, related feature of the CNC is Adaptive Feedrate Control. This capability monitors spindle load and adapts the feedrate override accordingly. When used in conjunction with trochoidal milling, for example, it speeds the milling pass significantly, because all of the air cutting within each loop of the trochoidal path can be taken at a user-specified override of perhaps 150 percent, reducing cycle time.

The hands-on basic training course with the Heidenhain control in the new facility lasts 4.5 days. The company will offer an advanced course for experienced users as well, and the new facility also provides a setting for customized training for companies in search of this. The latest example is a medical device maker that has asked Heidenhain and Mr. Miller to train its machining staff in more advanced use of machine tool probing for machine verification and on-machine inspection.

Posted by: Peter Zelinski 19. November 2015

Five-Axis Machining for Multi-Part Processing

In a post on Hurco’s CNC machining blog, company applications engineer Mike Cope describes how the fixture shown above was implemented to allow a five-axis machining center to achieve not just five-sided machining for one part, but five-sided machining for all of the workpieces shown here with a single cycle.

Programming the four different pieces at these four different orientations would seem complicated, but Mr. Cope explains that it can actually be accomplished using straightforward control features. A “transform plane” function is used to relocate the program origin from the center of the workpiece to the peak at the center of the fixture, and also to tip the coordinate field to match each part’s 20-degree angle. Then, a “toolchange optimization” feature is used to allow each tool to make the relevant cuts on each of the parts before the tool is changed out. The result is five-sided machining gracefully expanded into multiple-workpiece machining.

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