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Covering tools and technology for motion control engineers designing for electrical and mechanical systems.
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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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Video Slideshow overview of the Lexium MDrive product family

SEM USA | March 30, 2015

Watch this video slideshow for an overview of the Lexium MDrive family of Integrated Motion Control products.

Sizing: Load to rotor inertia matching ratios

Bob Parente | March 17, 2015

We started our stepper motor sizing discussion with the last posting and introduced the NEMA rating for motors. The stepper sizes that we talked about ranged from the smallest NEMA 14 up to the largest the NEMA 34. Other manufacturers might have smalle …

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Sizing: stepper motor physical size

Bob Parente | February 11, 2015

Our last posting talked about applications that had marginal torque and that caused our “Hybrid” motor to correct its position. These applications were essential “path critical” and the correcting moves the “Hybrid” control did cause the path or the mo …

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hMTechnology and Position Make-up II

Bob Parente | January 22, 2015

In our last posting we raised some questions about how the “position make up” made up for the steps that were removed. Position make-up will compensate for position errors due to a disturbance during a move by reinserting missed steps into a motion pro …

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