Motion Control

3-Phase Motor Control

TURCK (Minneapolis, MN) released the BL20 xStart motor starter modules that allow 3-phase motor control to be connected to the same rack as standard I/O. The units may be mounted next to other BL20 modules, allowing motors to be controlled via DeviceNet, Profibus-DP, or CANopen fieldbus protocols.

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Roller Bearings

AST Bearings (Montville, NJ) introduced the High Carbon Chromium Steel Tapered Roller Bearings line, comprised of the inner and outer rings, tapered rollers, and a cage (roller retainer). The rings and rollers carry the load; the cage spaces and retains the rollers on the inner ring. The product is stable under heavy loads, is resistant to harsh or contaminated environments, and designed for moderate speed applications. Metric and imperial sizes are available. Standard stock sizes are: ID 15 – 240 mm or 0.59 – 9.45" to OD 35 – 40 mm or 1.38 – 15.75". Customization is available.

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Magnetic Encoders

Baumer Electric (Southington, CT) released four magnetic encoders for harsh or contaminated environments. The devices come in diameters of 30 and 40 mm. The EcoMag 30 and EcoMag 40 are incremental encoders, offering resolution from 2 – 1,024 ppr. Their absolute counterparts, the MagRes 30 and MagRes 40, provide single-turn resolution up to 10 bits and SSI output. Maximum rotational speed for the sensors is 12,000 rpm. The 30 mm sensors have shaft diameters of 5 mm; the 40 mm hollow shaft sensor accepts shaft diameters of 12 mm. Both models are resistant to high shock and vibration.

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Corrosion-Resistant Bearings

MRC Bearing Services (Kulpsville, PA) released the custom-engineered “HNCR” steel bearings made from high-nitrogen corrosion-resistant steel. The bearings display a hardness of 58 HRC, and have an extended fatigue life. Chromium has been added to further augment durability and corrosion resistance. The bearings may be customized.

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DIN Motion Controller

From Trio Motion Technology (Pittsburgh, PA), the MC302X DIN rail-mounted motion controller features two axes; the first can be configured in software for servo (with encoder feedback) or high-speed stepper control. The second axis may be either a reference encoder or a stepper axis. Differential line driver stepper outputs can be configured for standard simulated quadrature encoder outputs to synchronize multiple units. Each axis can run moves using linear or circular interpolation, electronic cams, and gearboxes. Two inputs may be configured for accurate hardware registration. The device operates from 40 mA to 24 V DC, and has four 24 V inputs and four bi-directional input/output channels built in with optical isolation. Other features include an RS232 programming port, and a user selectable RS232/485 port for peripherals. The controller is programmed using Trio BASIC.

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Ball Splines

Released from THK (Schaumburg, IL), the SLS/SLF Ball Splines feature caged technology, allowing for smooth motion. A synthetic resin cage cradles each ball, separating it from others, while spaces between rolling elements retain the lubricating grease to act as a lubrication system. The units feature a rigidity of ±10%. Outer shaft diameters are available from 15 to 100 mm. Low-noise options are available.

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Linear Actuator

From Exlar (Chanhassen, MN), the Tritex™ Series of electric linear actuators, combining a brushless servomotor, servo amplifier, and position control in one unit. Up to 500 watts of continuous power can be applied to the actuator’s brushless servomotor. The standard product is rated IP54 with optional IP65 rating for wash-down and fluid applications. Mountings include front flange, rear clevis mount, side mount, and trunnion mount. The unit is available in standard IEC metric dimensions. Other features are: 24 and 48 V DC power, 25" per second maximum linear velocity, 1,250 lbf maximum continuous thrust capacity (2,270 lbf peak), and low resolution incremental feedback. Customization is available.

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