Back to top

A servo drive should be selected based on the specific servo motor used in the application. The motion requirements of the driven mechanism determines the voltage and current requirements of the servo motor – the key information required when selecting a servo drive.

In simplified terms, bandwidth can be calculated as 1/(settling time) of a given step response of a servo system.

A servo drive is an electronic device that is part of a closed loop system, producing current and voltage to rotate a servo motor. The closed loop system includes the servo drive, servo motor and feedback device, and is commanded from an analog or digital signal.

A stable servo system is essential for optimal machine performance, durability, safety, and consistent machine performance, which improves overall machine operation. Servo systems operate in various degrees of stability, with a fine line between stable and unstable. Changes in the mechanical system over time or machines with varying loads can move the system from a stable to unstable operating condition. This article unveils four key values that determine the stability level of a servo system.

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.

The need for flexible automation for material handling has now moved from being an interesting technology project for enthusiasts to conscious decisions made in the board room of Fortune 500 companies as well as the private owned, small sized company. Why? one may ask. Because the business case is very reliable, and the savings can be predicted if you know what you do.

Many of us do not truly understand or appreciate the underlying foundations for how and why mankind has achieved such enormous success and prosperity. More commonly, we are taught about problems with the world and the challenges that we will face in the future.

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.

Pages

Blog Taxonomy Helper

Aerospace & Defense
Applications
Automated Guided Vehicles
Business
Embedded Motion
Engineering
Fieldbus
Food Regulations
General
History
Installation Tips
Interconnectivity
Medical
Oil and Gas
Packaging
Robotics
Technology
University Partnerships
Subscribe to Blog in Motion