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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 …

Sizing: stepper motor physical size Read More »

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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hMTechnology and Position Make-up

Bob Parente | September 24, 2014

Our last few postings talked about the “torque mode” operational theory that we added to our “Hybrid” drive. Prior to that we added “variable current mode” and “position makeup” If you haven’t read about those drive enhancements, I suggest that you go …

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Industrial connectivity and IEC61076-2-101: M12 Lexium MDrive introduced

SEM USA | August 27, 2014

Since the early 1990s, the Fieldbus protocols have become the preferred industrial network system for distributed control. Machines designed around these standardized networks have evolved to become more robust and environmentally resilient to meet dem …

Industrial connectivity and IEC61076-2-101: M12 Lexium MDrive introduced Read More »

Four Quadrant Drives: Torque Mode with Hybrid Drives Part II

Bob Parente | June 4, 2014

In our last posting we discussed how we made our “Hybrid Drive” act like a torque motor. One issue that you do have be aware of is the fact that at some point in the stepper’s speed-torque curve the torque is going to begin to fall off as a function of …

Four Quadrant Drives: Torque Mode with Hybrid Drives Part II Read More »

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