Motion Control

Fringe Tracing Software

Engineering Synthesis Design, Inc. (Tucson, AZ) released the IntelliWave ™ interferometric measurement software package to monitor fringe change in fluid flow and thermodynamic analysis applications. The software allows for parallelism, angle, ROC, tool offset, homogeneity, and absolute measurements. Users can monitor over 30 fringe parameters (area, size, temperature, etc.), and may use any camera or scanner for data acquisition. Features include intuitive user interface, interactive spreadsheets, multi-region unwrapping and masking, real-time user interaction, and classical, shearing and speckle analysis.

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Rotary Stages

Aerotech (Pittsburgh, PA) released the ALAR series of direct-drive, large-aperture rotary stages. Coming in five aperture sizes (100, 150, 200, 250, and 325 mm), the units are designed for angular positioning and velocity control, and feature zero backlash, no gear wear, or gear vibration. Features include 45 – 300 rpm continuous rotation speed, continuous or limited travel, axial load capacity of 300 – 1,000 lb, and low wobble. Vac 10 – 6 torr compatible versions are available. The stage is 65 – 160 mm tall. Two configurations, standard profile (SP) and low profile (LP), are available.

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Ball Bearing Mounts

Asymmetric Fasteners, Inc. (Hackettstown, NJ) released the Torksleeve B mounting for ball bearings, compatible with roller, needle, linear, or plain bearing types. The unit provides quick assembly time, is compact, and lightweight. The unit also rebuilds in the field, and mounts to metal or plastic walls. The asymmetric thread design self-locks and is resistant to vibration. Tightening of the nuts causes the slotted sleeve to contract, gripping the bearing and clamping the unit to the frame.

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Achieving Positioning Accuracy Goals

The task of choosing the correct mix of motion control components for a successful servo positioning system involves a combination of art, science, and experience. It also includes a little luck, but luck is not needed when you fully comprehend the principle of operation, accuracy, resolution, and repeatability of each component in the system.

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CNC Wood Routers Use Drive for Precision Control

The woodworking industry is as advanced and under pressure to deliver high-quality goods quickly as any. One of the most versatile tools devised to quicken production with flat panels of wood is the wood router, used to rout (hollow out) an area in the face of a piece of wood, and used for 3D design, cabinets, sign making, molds, and general material cutting. The table-like device, similar to a metal mill, consists of a broad-based wooden hand plane with a narrow gantry-carried cutting implement projecting beyond its base plate. To guide its computer numerical controlled (CNC) ATC wood routers, WartHog CNC (Soddy-Daisy, TN) turned to YET US’s (Manchester, NH) XtraDrive servo drive system, integrating it into the routers’ precision and power controls.

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Drive Utilized in Filament Respooler

Optical fiber, now the mainstay of telecommunications as well as sensor, illumination, and imaging systems, is made by first pulling a large-diameter preform into a long, filimentous fiber. Then divided into bunches, a resin cladding is applied to keep the transmital of light uncontamintated. The finished product is then wound onto large spools to await shipment to customers. Showmark (Downingtown, PA) developed the automatic UniSpooler to customize the amount of cable a customer gets based on need, and uses the Kinemax KI3-15-5 linear drive from Amacoil/Uhling (Aston, PA) to help guide filaments from the supply spool to smaller takeup spool with the desired amount of fiber or wire.

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Brushless Motor Drive

Intelligent Motion Systems (IMS, Marlborough, CT) released the MDrivePlus motion control system for brushless motor applications. The unit features 20 microstep resolutions to 51,200 (full step, degrees, metric, and arc minutes), a motion control system-on-a-chip, electronic gearing, 6,385 bytes of program storage, and analog input to 10 VDC. Drive voltage ranges include +12 to +75 VDC and 120 and 240 VAC. The housing is chemical resistant and the unit has a cast aluminum heat sink. Outputs are configured for sourcing or sinking, and the unit features an auxiliary logic power input.

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