Servo systems typically use a combination of three types of control loops: current, velocity, and position. The velocity control loop serves two purposes—it enables the system to respond to changing velocity commands, and it allows the system to resist high-frequency load disturbances. But the velocity loop by itself can’t ensure that the system maintains a […]
Servo Motors
Why use brushed servo motors?
The idea of brushed servo motors may seem a bit counterintuitive—most of us think of servo motors as high-performance devices used in highly dynamic applications, while brushed DC motors are low-cost solutions for mass-produced consumer devices. And, to a large extent, this is correct. But remember that “servo motor” is a fairly broad term that […]
Why is the bandwidth of a servo control loop important?
A servo drive can include any combination of three types of control loops—a position loop, a velocity loop, and a current loop. While each loop’s purpose is to control a different aspect of the motor’s performance, they are all characterized by a common parameter: bandwidth. The bandwidth, or response time, of the system is a measure […]
New servomotor from Rockwell Automation improves machine performance
With the new line of Allen Bradley Kinetix VPC servomotors from Rockwell Automation, manufacturers can run machines in processes such as converting, printing and web handling at higher speeds and higher torque, significantly improving machine throughput. “The Kinetix VPC servo motor provides high continuous torque at high speeds over long periods of time,” said David […]
Unique servomotors improve packaging application
High-capacity manufacturing applications are leveraging servomotors and drives in their quest to achieve better efficiency with automation. This is because servomotors are one of the most commonly used motors for precision positioning and load-responsive motion. Servomotors power applications in a wide range of industries, though are most suited for controlling the movement of machines in packaging, […]
Panel-mount brush servo drives work for centralized motion controls
The AxCent (Axes for Centralized control schemes) product platform brings the proven and powerful performance expected of ADVANCED Motion Controls, with improvements to the design architecture that utilize years of experience in the industry and the latest advancements in modern servo system design. As technology continues its shift from analog to digital, there is still strong demand for […]
FAQ: What are PID gains and feed-forward gains?
Gain is the ratio of output to input—a measure of the amplification of the input signal. A common example is the volume button on a stereo. This button controls the ratio of the input signal (received from the radio station) to the output signal (how loud the sound is from your speakers). When the volume is […]
What is distributed architecture for servo drives?
Article updated August 2019 || Traditional servo-system architecture consists of a power supply, a motion controller, and servo drives all housed in one location that is typically a control cabinet located away from the machine. Then each motor connects to the control cabinet by two cables … one for power and one for feedback. This […]
NEMA size 23 direct-drive hybrid servomotors from Quicksilver
A full range of NEMA 23 frame size Direct Drive Hybrid servomotors is now available from QuickSilver Controls. Four stack sizes provide 80 oz-in. (0.56 Nm) through 430 oz-in. (3 Nm) of continuous torque, with top speeds from 1,000 to 4,000 rpm. Hybrid Servo motors are well suited for direct-drive applications – eliminating the need […]
FAQ: What is electronic gearing for servo motors?
Gears are often used to establish a fixed speed relationship between a motor and a drive system (such as a ball screw, rack and pinion, or belt and pulley system). For example, when a belt and pulley system is connected to a motor through a 3:1 gearbox, each full rotation of the motor causes the […]