Most conveyor applications run at either a constant or variable speed, and therefore require only velocity control from the conveyor’s main drive motor. But positioning conveyors – like edge-belt conveyors for PC board assembly and positioning conveyors used in automated checkweighers – need to do more than just velocity control. The main drive motor needs to start and stop the conveyor with precision. The level of precision can range from moderate to fairly high. This level of positioning control requires more than your average DC or AC motor used for velocity control. Step motors and servo motors are the best solutions because of their precise positioning capabilities. This article highlights the three most popular methods for controlling step and servo motors used in positioning conveyors.
Applied Motion Products, Inc., designers and manufacturers of StepSERVO™ Closed Loop Integrated Motors, announced today the appointment of Control & Motion, Inc. (CMI) as manufacturer’s representative for all of Alabama, Georgia, Florida, Mississippi and Tennessee.
StepSERVO closed loop integrated motors with the Step-Servo Quick Tuner software and built in Q Programmer are well suited for labeling, packaging, and food & beverage applications. StepSERVO integrated motors provide closed loop servo control of position, velocity and torque using high torque step motors. The result is higher acceleration for faster machine cycles, and the motors run cooler and quieter than open loop stepper systems.
A premier postal sorting machine OEM in the northeastern United States has developed a machine to automatically sort irregularly sized mail items that traditionally have been sorted by hand. Representatives from Minarik Corporation (part of Kaman Automation, Inc.) and Applied Motion Products began working with the OEM early in the design stages, providing guidance on motor sizing and selection as well as prototype units for research and development purposes. Today the OEM has moved into production with the design, having already shipped several machines, and the StepSERVO integrated motors that have been implemented in the design are performing excellently, with more than 2000 motors in the field so far.
This Did You Know? article covers the process of closing a simple analog position loop using a Q program and an Applied Motion stepper drive with differential inputs.
Some step motor applications require an operator to adjust a rotary valve or air vane and cannot use a homing sequence on power-up. The operator just needs to turn a control knob and have the load move to the correct location.
In conjunction with the expansion of our successful line of StepSERVO™ closed loop integrated motors, we recently conducted a sales competition for our North American distribution partners. The competition was designed to award the individual distributor salespeople who successfully installed the greatest number of StepSERVO integrated motors over a six-month time period. The competition was a huge success, with a higher-than-expected number of distributor salespeople participating and a wide range of new customers for these high performance products.
You've seen it online, now see it in person! 3D Platform and Applied Motion Products would like to invite you to attend a Large Format 3D Printing Demo and Seminar on Wednesday, May 25. This event will showcase the new 3DP Workbench with a live demonstration. There is no cost to attend and lunch or refreshments are included.
Many of our customers take advantage of the benefits of Q Programming, our text-based programming language designed for simple yet powerful programming of single axes. Q Programming incorporates commands for various kinds of motion, I/O control and sequencing, and math functions that enable users to create all kinds of motion control sequences and algorithms, from the most basic to very advanced.
Users of step motors will praise their simplicity, excellent positioning skills, and economy. They may also lament certain characteristics of step motor performance. For example, traditional step motor systems run open loop which means the drive electronics supply constant current to the motor whether there is a demand for torque from the load or not. What happens to that current when there’s no torque demand? It is lost as heat.
Did you know the same technology that drives the new Five-hundred-meter Aperature Spherical Telescope (FAST) in China is available to Applied Motion Products customers everywhere? Initiated in 1994, the FAST telescope is a key national scientific and technological infrastructure project in China. Standing in a region of typical Karst depressions in Guizhou province, the dish-like telescope will be as large as 30 football fields.