Motion Control

Choosing the Right Drive Technology

Coming up with the right drive technology for an application often depends on the options available. Here are five of the most common drive configurations being used today, along with their benefits and drawbacks. Although there are a number of variations of drive technologies for motion applications, there are a few that are used for the majority of systems being built today. These most common drives do take a bit of understanding before applying.

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Reasons for Turning to Slotless DC Motor Technology

When first introduced, brushless DC motors, despite their many advantages, were cast as a costly alternative to brush-commutated motors, and were typically only specified for low-power applications where long life was the primary desired requirement. Without the mechanical brush-commutator mechanism that would wear and eventually result in motor failure, brushless motors could be relied upon to deliver performance over time. As for other advantages, conventional wisdom held that brushless motors provide high speed and fast acceleration, generate less audible noise and electromagnetic interference, and require low maintenance. Brush-commutated motors, on the other hand, would afford smooth operation and greater economy.

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Motion Solutions for Electric Expansion Valves

Expansion valves are flow-restricting devices present in any refrigeration system. The valve needle remains open during steady state of operation. The size of the opening, or position of the needle, is related to the pressure and temperature of the evaporator. When set and controlled properly, an expansion valve will keep the evaporator active throughout its operation.

Posted in: Application Briefs, Motion Control

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Hamburg Airport Relies on Drive Technology to Keep Bags Moving

Hamburg Airport in Germany handles nine million pieces of baggage every year. For the baggage handling staff, the reliability of the conveyor system and the prevention of faults are the highest priorities. The breakdown of even a single component of the system would result in a backlog and unacceptable delays.

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Industrial Robot

ABB (Auburn Hills, MI) introduced YuMi, a collaborative dual-arm industrial robot designed for small parts assembly environments. It features dual arms, flexible hands, a universal parts feeding system, camera-based part location, lead-through programming, and motion control. YuMi has a lightweight yet rigid magnesium skeleton covered with a floating plastic casing. The casing is wrapped in soft padding to absorb impacts, enabling the robot to operate in very close collaboration with humans. It has human dimensions and movements, and has no pinch points so nothing sensitive can be harmed as the axes open and close. If YuMi senses an unexpected impact, such as a collision with a coworker, it can pause its motion within milliseconds, and the motion can be restarted again by pressing a button. For Free Info Visit http://info.hotims.com/55592-300

Posted in: Products, Manufacturing & Prototyping, Motion Control

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Air-Bearing Platform

Aerotech (Pittsburgh, PA) offers the PlanarHDX planar air-bearing platform for semiconductor manufacturing and advanced test and inspection. Structural elements were designed using a silicon carbide ceramic. The resulting material and structure enable 1.5-m/s scan speeds and 5-g peak acceleration with a payload of up to 20 kg for high-throughput processing. Other features include an air-bearing compensation strategy that increases stiffness and load capacity for high-dynamic applications. The platform uses air-on-air preloading in critical bearing elements, and a proprietary reaction-mass design reduces stage-induced forces in the step-axis that are transferred to the isolation system or structure (optics, sensors, etc.).

Posted in: Products, Manufacturing & Prototyping, Motion Control

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3D Infrared Scanner

Aimess Services (Braunschweig, Germany) offers the R3Dscan 3D infrared scanner as an automated solution with direct connection to industrial robots. The scanner can be integrated into production lines to inspect dimension, shape, and position of objects in manufacturing cycles. The scanner was designed for inspecting objects with transparent, black, or reflective surfaces that cannot be measured with fringe projection systems (e.g. white light scanners) that usually require surface preparation with anti-reflective matting spray and the placement of measurement targets. The 3D scanner does not analyze the reflection, but rather the energy absorbed by the object to be measured. This energy is converted into heat, which is captured by the system using an infrared detector. It is also suitable for robot-assisted inline inspection of lightweight materials such as carbon fiber, glass fiber, and fiber-reinforced plastics. For Free Info Visit http://info.hotims.com/55592-318

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