Motion Control

Ball Bearing

Bishop-Wisecarver Corp. (Pittsburg, CA) has announced The Radial Wheel, a single-row, deep-groove ball bearing designed for applications with specified radial loading conditions. The wheel enables reliable motion in environments exposed to debris such as sawdust or grit. The bearings make it possible to convey heavy loads without additional capabilities unnecessary to the application requirements. The 90-degree vee-groove bearings work in finished products like sliding wall panels and motorized doors and windows.

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Vibration Control System

Crystal Instruments Corp. (Santa Clara, CA) has introduced the Spider-81, a modular, distributed, scalable vibration control system with centralized DSP architecture and operation via PC, WiFi-enabled PDA, or iPad. It directly integrates time-synchronized Ethernet connectivity with an embedded DSP centralized architecture. Its patented dual A/D design enables it to achieve a 130-dB input dynamic range. Each measurement channel can detect signals ranging from 6 μV to 20V, with a design that eliminates the need for the input range or gain settings found on traditional controllers.

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Six-Axis Robot

ABB Robotics (Auburn Hills, MI) has introduced the IRB 120T, a multipurpose 6-axis robot. It is suited for assembly and pick-andplace applications requiring reorientation of the product, commonly found in the food and beverage, consumer packaging, consumer electronics, electrical, and automotive industries. The robot features path repeatability of 0.01 mm, motion control and path accuracy, and weighs 25 kg (55 lbs). It has a standard payload of 3 kg (6.6 lbs), a vertical wrist payload of 4 kg (8.8 lbs), a reach of 580 mm, stroke of 411 mm, and the ability to reach 112 mm below its base.

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Servo Drive

The Gold Drum HV 100/800 from Elmo Motion Control (Nashua, NH) is a compact servo drive that delivers up to 100 A and operates up to 800 VDC. The 60-KW, high-performance, wide-bandwidth servo drive is EtherCAT and CANOpen compliant. Set-up and tuning are performed using Elmo Application Studio (EAS) software tools with a Windows-based application that enables users to configure the drive for their motor. Features include “direct to mains” operation from rectified 480VAC, networking by EtherCAT or CANOpen, support of feedback in any configuration, and wide bandwidth in current, velocity, and position operating modes.

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High-Accuracy Closed Loop Force Feedback

Benefits of serial servo digital presses for force gauge specifications. Hand-driven press assemblies, which require a specific amount of force applied for a given amount of time, present challenges when attempting to accurately measure or replicate results in production or quality control processes. In contrast, servo-driven digital presses are able to provide accurate, consistent, and repeatable results while outputting trackable data. By controlling position and current, the servo-driven digital press allows for stable, accurate, and repeatable control.

Posted in: Bio-Medical, Briefs, Briefs

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Rotary Sensing Technologies for Medical and Robotic Shaft Angle Sensing Applications

This technical brief provides an overview of existing types of rotary sensor technologies, and compares the strengths and weaknesses of each type for use as through-hole shaft angle sensing devices. Today’s sensor technologies for robotic and medical applications include many devices that have evolved from industrial applications. Because of this general migration, they are not ideally suited to the requirements in new robotic and medical products. Specifically, conventional contacting and non-contacting sensing solutions do not offer the customization, small package size(s), and environmental and durability requirements that are so necessary in these custom applications.

Posted in: Bio-Medical, Briefs, Briefs, Positioning Equipment, Robotics, Sensors

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Servo Drives

AMK Drives and Controls (Richmond, VA) offers the AMKASMART iC servo drives for single-axis machines and modular machine configurations. The compact drives for closed-loop control of servomotors up to 10 kW peak power can be installed almost anywhere in a machine. The drives come equipped with 3x 400VAC supply, mains filter, brake chopper, and 24VDC power supply unit. Convection cooling, an integrated fan, or cold plate installation are available.

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