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Welcome to Kollmorgen's Blog in Motion.  We have been adding information and knowledge to the great web based world for many years - through white papers, technical documents, and even webinars.  Kollmorgen enjoys sharing our knowledge with you, as well as identifying other motion related tidbits through our Twitter, Facebook, LinkedIn and YouTube feeds.  Our newest source is Blog in Motion, covering a wide range of topics, as well as some interesting contributing authors with lots of Motion experience.  If Motion Matters to you, stop by, follow, like, and sign up so you can stay tuned for what Kollmorgen has in store for you!

There are several considerations when selecting a servo motor for a specific application, such as the required speed, torque or force, motion profile, available physical envelope, and environmental factors. This means that the chosen motor solution must produce the load torque and speed requirements, fit in the available space, and perform as required under the subjected environmental conditions of the application.

Bode plots have existed since the 1930’s when Hendrik Bode devised a way to display gain and phase-shift plots in the frequency domain. Today, to produce a detailed frequency response plot that reveals the unique fingerprint of a servo mechanism in the frequency domain is as simple as pressing a computer key. This paper discusses five key items in a Bode plot and what they reveal about the machine.

A servo motor is an electromechanical device that produces torque and velocity based on the supplied current and voltage. A servo motor works as part of a closed loop system providing torque and velocity as commanded from a servo controller utilizing a feedback device to close the loop. The feedback device supplies information such as current, velocity, or position to the servo controller, which adjusts the motor action depending on the commanded parameters.

So, you’re beginning to size a new servo motor and drive for an application. How do you go about doing this? Sizing tools can be highly beneficial for achieving optimized products. However, one needs to pay attention to the warnings and information provided in sizing systems.

We cover the top 5 advantages of direct drive motors, where the system or motor is connected directly to the load, versus a conventional rotary system.

A collaborative robot (Cobot) is a robot intended to physically interact with humans in a shared workspace. This is in contrast with other robots, designed to operate autonomously. A "cobot" is a robot that works in tandem with a human worker. The assumption is that a cobot and a human can produce an end result better and faster than either could do working alone.

If you experience some unintended motion or unexplained drive faults in your motion system, there are several possible causes. For example, motion setup through the drive, a poorly designed program within the control, and motor or feedback commutation phasing 180 degrees out can all cause unintended motion. For this review, we’re going to look at issues created by the contribution of poorly chosen and installed motor cables.

Frameless, or “servo motor kits”, open up numerous possibilities in designing motion elements for your machine related to performance.  A frameless motor consists of rotor and stator components which are built into a machine assembly to transmit torque to a load.  Many applications which take advantage of a frameless motor are direct driven, which eliminates bandwidth robbing compliance.  Effectively, this means you have eliminated torsional losses and any wind-up or spring losses. 

A collaborative robot (or Cobot) is a robot that is made to work with or interact with human co-workers. For most of us normal folks, the most well-known example is Tony Stark’s robotic arm. (For those reading who are wondering why I don’t refer to the arm as JARVIS, it’s because JARVIS is the AI and controls other things but not the robotic arm.) Tony has bit of an unhealthy relationship with the robotic arm, he insults it, puts it in a dunce cap, puts it in time out, or threatens to dismantle it. At which point the robotic arm usually hangs his robotic limb downward into sadness. But, the robotic arm is there to do work for Tony in his basement. He may have a large house, but he doesn’t want a 10-foot-tall robot behind a fence. He wants an assistant, a co-worker of sorts that can help build his Iron Man suits.

Until the start of the new millennium, it was customary practice to purchase drives, motors, and cables from different suppliers. Nowadays, connection cables are no longer considered to be an accessory but a product in their own right that requires a level of competency similar to that of any other product. Only the company that designed the motors and drives is in a position to make the appropriate choices to offer its customers a high quality and flexible connection that can be tailored to their application requirements.

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