When it comes to step motors, a new drive technique called stepper servo has some engineers believing they have found the holy grail of positioning motion control - the high performance of a servo motor with the low cost of a step motor. In this article we will explore the benefits and limitations of the stepper servo control technique, also called closed loop stepper, and explain why it is attracting serious attention from machine designers.
The Juno MC71113, MC73113, and MC78113 are newly released ICs that provide velocity control of 3-phase Brushless DC and DC Brush motors with advanced features such as PI velocity loop control, programmable velocity estimation, dual biquad filtering, shunt regulation, deadband filtering, FOC (Field Oriented Control), and more.
A noisy or chattering servo axis is perhaps the single most common motion problem that engineers encounter when building their DC Brush or Brushless DC motor-based machine. This is not only annoying but can cause increased wear and tear on the motor and downstream mechanisms. The problem can occur both when the servo motor is holding position, and when it is moving - although the sound characteristic may be different for each of these conditions.
Trajectory generation techniques such as 7-segment S-curve profiles, asymmetric acceleration and deceleration, continuous contouring, and electronic CAMming are standard features in modern machine design. They provide engineers the tools they need to make controlled loads move faster and more efficiently. This paper will take you through the mathematics of motion profiles, discuss which profiles work best for which applications, and provide insights into how modest changes in the profile parameter settings can create big improvements in throughput.
March 26, 2020 at 12:00 p.m. ET Autonomous robots are figuring out how to navigate around people and obstacles to keep people and robots safe. In this webinar, MCMA explores this new era and the intersection of robot safety and technology. Presented by MCMA and Sponsored by PMD
July 26-30, 2020 | Chicago, IL Meet us in booth #4843 at the 2020 AACC Annual Scientific Meeting. During this event you will have an unparalleled opportunity to connect with global leaders in laboratory medicine and to discover cutting edge technology and vital research in the field.
Replay this popular webinar hosted by David Wagman, Editorial Director at IEEE Engineering360, and featuring panelists Prabh Gowrisankaran, VP of Engineering and Strategy at PMD, Kevin McCarthy, CTO at Dover Motion, and Dr. Gregory Fischer, Professor of Mechanical & Robotics Engineering at WPI.
Motion Techniques For Improved Liquid Handling
Today's lab equipment requires fast and precise pumping to aspirate, dispense or continuously pump liquids. This paper illustrates key motion control techniques for improved accuracy.
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