Motion Control

Linear Position Sensors

Vented versions of the CD 375 Series of miniature AC-operated LVDT position sensors are available from Macro Sensors (Pennsauken, NJ). The sensors withstand high pressures and temperatures in applications where space is at a premium and the environment is hostile. As the coil assembly of the sensor is vented to equalize pressure inside and outside the LVDT linear position sensor, units can withstand a combination of high pressure and temperatures, shock, and vibration. Since vent holes in the housing expose the coils inside, fluid must be electrically nonconductive and chemically benign.

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Spring-Engaged Brakes

Nexen Group (Vadnais Heights, MN) has introduced the FMBS flange-mounted, spring-engaged safety brakes with high thermal capacity for NEMA C-Face motors and gear reducers. With continuous thermal dissipation, the brakes are able to stop more kinetic energy without overheating. The brakes are available in two models that provide torque from 1080 in-lbs to 1800 in-lbs, and burnished torque from 1300 in-lbs up to 2160 in-lbs, with release pressures of 55 psi and 90 psi and a maximum pressure of 120 psi. Both models feature a top speed of 1800 rpms and zero backlash input.

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Servo Drives

Technosoft (Neuchatel, Switzerland) has announced the iPOS3602 BX-CAN and iPOS3604 BXCAN closed-frame intelligent drives. Equipped with a CAN interface, the drives control rotary or linear brushless, DC brush, and step motors of powers up to 144W and 36V nominal voltage. They drive 2 A or 4 A continuous currents, and 3.2 A or 10 A peak currents at a supply voltage ranging from 12 to 36 Vdc, with a PWM of 20 kHz frequency. The servo drives offer single- or multiple-axis control functions such as master-slave or standalone operations. They embed motion controller, drive, and PLC functionality in one unit.

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Electronic Valves

Clippard Instrument Laboratory (Cincinnati, OH) has introduced the Analytical Series electronic valves available in 2-way or 3-way, normally closed or fully ported. The “A-E” Series pneumatic valves utilize a patented valve system that features power consumption of 0.67 Watts, a response time of 5 to 10 milliseconds, and voltages of 6, 12, or 24 VDC. Special materials, manufacturing, and assembly processes enable the valve to be used for applications where internal cleanliness, bubbletight operation, and long life are required.

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Dispensing Pump

Aalborg® Instruments (Orangeburg, NY) offers the TPV RP dispensing peristaltic pumps with adjustable RPM that can be timer-relay set to start dispensing liquids for a selected time period, and to stop dispensing for another selected time period. Seven time intervals are possible. Easily accessible controls enable priming, dynamic braking, RPM setting, and flow direction reversing. The adjustable pump handle serves as a base to lift and angle the pump face, and ensures that the controls are accessible. Designed to pump liquids of low to high viscosity from source to destination, the pump can accommodate user-set speeds of 0 to 300 RPM with a flow range of 0-5000 ml/min. Features include 3 stainless steel rollers and stainless steel shafts, fixed occlusion wall, 24 VDC brushless motor, and a safety cover.

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Slide

The NV type STUDROLLER™ from NB Corp. (Hanover Park, IL) is designed for motion control applications with extremely fast acceleration and deceleration at dimensions ranging from 30 to 600-mm lengths. The slide features Anti-Creep Cage Technology and raceway depressions that track the nodules, preventing slippage in any position. Load capacities were increased 1.4 to 2.3 times over the standard SV type, and the number of rollers was increased 20 to 55 percent.

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Control Platform

The Ensemble® LAB control platform from Aerotech (Pittsburgh, PA) enables automation of light industrial manufacturing applications. The full-color touchscreen display enables access to core functionality, while the tabbed interface provides singlepress access to setup and operation screens. An integral rubberized frontpanel interface provides tactile feedback for jogging and manual positioning operations. The platform is programmed in a BASIC-like syntax, and is programmed offline with a graphical user interface in Windows®.

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Inclination Sensors

Balluff (Florence, KY) offers BSI inclination sensors that measure the deviation in a horizontal axis of up to 360 degrees. They operate in temperatures down to -40 °C. They feature rugged metal housing and accuracy of 0.1 degree for controlling processes. An extended temperature range of -40 to 85 °C is suitable for outdoor applications such as oil and gas extraction, wind energy systems, and solar-thermal power plants.

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Coupler Brake

Force Control Industries (Fairfield, OH) offers a double C-Face coupler brake that mounts on the drive end of a standard C-Face motor. Mounting the brake between the reducer and C-Face motor allows a standard C-face motor to be used. Applications include palletizers, packaging machinery, and cranes. The Posistop air-actuated and MagnaShear electrically actuated coupler brakes never need adjustment. An annual fluid change, without removing the motor, is required.

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Rotary Actuator

Oriental Motor (Torrance, CA) has introduced the DGII Series hollow rotary actuator that uses an AR Series closed loop motor. In addition to the pulse input type package, a built-in controller (stored data) type package with I/O, Modbus, or EtherCAT (via a gateway converter) communications is also available. Both types come with a 3-m (9.8-ft.) cable. The actuator offers reduced power consumption and heat output, and the large-diameter hollow hole (through-hole) helps to reduce the complexity of wiring and piping.

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