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Covering tools and technology for motion control engineers designing for electrical and mechanical systems.
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Fundamentals of Motion Control

Jeff Kerns | August 31, 2018

Recently I came across a simple infographic from Power Jack Motion that did a nice job of visualizing the difference between alternating current (ac) and direct current (dc) motors. This article will follow and present the information contained therein …

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The Truth About Manufacturing

Travis Hessman | August 3, 2018

In America today, truth has become a particularly slippery asset. This goes beyond the usual political hot topics, cutting deep into the fabric of basic reality. Because, despite our unfettered access to unlimited troves of data, statistics, forums, an …

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Addressing STEM’s “Skills Gap” by Closing the “Interest Gap”

Jennifer Shupp, Jennifer Champion | August 3, 2018

Over the next decade, nearly 3.5 million manufacturing jobs will be needed, with 2 million expected to go unfilled due to the skills gap. Further, 80% of manufacturers already report a moderate or serious shortage of qualified applicants for skilled an …

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Sizing: Adding a rubber sleeve as a primary roller

Bob Parente | May 11, 2018

Recap of the last posting In our last posting, we were comparing the inertia of a 12” long, 0.25” diameter steel rod (0.0013 lb-in^2) to a 1” long, 1” diameter aluminum coupling (0.00957 lb-in^2). We asked why the lighter weight aluminum co …

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Sizing: Calculating the inertia of a load shaft

Bob Parente | February 15, 2018

In our last posting, we calculated the inertia of a helical shaft coupling. The coupling is used to connect the motor shaft to the load shaft. We calculated the inertia of: a coupling that was 0.5” in diameter and 0.5” long at 0.0003 lb-in2 a coupling …

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Five Questions with Eric Klein of Schneider Electric

SEM USA | December 7, 2017

Lexium MDrive Linear Actuator NEMA 23 IP20

Eric Klein, global sales manager of Schneider Electric Motion USA, answers five key questions on the future of the Motion Control industry. In the article, Eric discusses emerging technologies, industry trends, the opportunities presented by the Intern …

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Sizing: Determining the mass of the coupling

Bob Parente | September 12, 2016

In our last posting, we talked about having a good quality coupling that connected the motor’s shaft to the load’s shaft. Finding the right coupling A good quality coupling would be able to accommodate a reasonable angular misalignment between the shaf …

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Torsional Windup and Load Friction

SEM USA | May 11, 2016

In our last posting, we talked about how a very torsionally flexible coupling could affect the ringing at the load. A rubber tube We proposed a one-inch long plastic tube that fit snugly over the motor’s shaft and the load’s shaft and that the torsiona …

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Sizing: Load to rotor inertia matching

Bob Parente | January 23, 2016

We’re continuing our discussion about stepper motor ringing and inertia matching. We had established the following load-to-rotor inertia ratios: Figure 1: Inertia Matching in stepper Motors 1:1 load-to-rotor inertia as an ideal ratio. Greater than 1:1 …

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Sizing: Ringing and inertia mismatch

Bob Parente | June 9, 2015

I’m sorry if you Googled “ringing” because of a hearing issue and end up on this blog. You should Google “tinnitus” instead or search the WebMD site. Now where were we? Oh yea, in our last posting we were talking about load-to-rotor inertia matching. W …

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