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Mini Servo Actuator

Harmonic Drive (Peabody, MA) introduced the FHA Mini Actuator, a hollow shaft, brushless servo actuator. The unit is a combination brushless DC servomotor and an encoder, with a through-bore up to 14 mm in diameter. The flanged output is supported by a bearing structure allowing the load to be mounted to the actuator. The maximum torque is up to 250 in-lb, with an accuracy of 1.5 arc minutes. Three frame sizes are available, ranging from 50 – 74 mm square, and 48 – 66 mm in length.

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Digital Motion Controller

The EPOS P 24/5 from Maxon Precision Motors (Fall River, MA) is a programmable digital motion controller capable of position, velocity, and current mode. The unit’s supply voltage is 11 – 24 V DC; the controller is capable of 5 A maximum continuous current and 10 A peak current. The device, after initial programming, can operate standalone or to control other non-programmable EPOS units. Communication is by RS-232 or CANopen. Programming is done via the IEC 61131-3 standard with various editors (ST, IL, FBD, LD, and SFC) Maximum motor speed is 25,000 rpm for 2-pole motors; maximum encoder input frequency is 1 MHz. The unit features six digital inputs, four digital outputs, and two analog inputs. Dimensions are 105 × 83 × 24 mm.

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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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