Motion Control

DC Accelerometer

Measurement Specialties (Hampton, VA) has introduced a rugged, triaxial DC accelerometer for steady-state, low-g vibration measurements and high-g transient shock measurements. The piezoresistive, MEMSbased Model 3803A provides triaxial measurement under harsh operating conditions. Hermetically sealed in a welded, stainless steel housing, the IP65-rated sensor is used for testing applications in harsh, high-performance installations. The unit is offered in dynamic ranges from ±2 g’s to ±2,000 g’s, and is gas-damped to provide a wide frequency response across all three axes. The unit’s MEMS sensing elements include overrange stops for protection to shock levels greater than 5,000 g.

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Encoders

Heidenhain Corp. (Schaumburg, IL) offers the Leine & Linde DRIVE-CLiQ encoder platform for operation in harsh drive environments where they are exposed to vibration, shock, and mechanical loads. The encoder can be installed to the motor mechanics typically found in heavy-duty applications without any adaptation needed. DRIVE-CLiQ is Siemens’ communication protocol for motor feedback in a SINAMICS drive system. It is an Ethernet-based interface for connection of different kinds of components like motors, frequency converters, and encoders.

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Torque Transducers

HBM (Marlborough, MA) offers the T40B and T40FM torque transducers that include an integrated speed measurement system. They are designed to work in harsh environments such as those that contain humidity, condensation, dust, oil, and grease. The transducers take measurements based on the contactless sensing of an anisotropic magnetoresistive (AMR) sensor, so the transducer signal is more stable than that of an optical system. The transducer integrates both the magnetic technology and the speed measurement sensor.

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Linear Actuators

Zero-Max (Plymouth, MN) offers Roh’lix® linear actuators made from stainless steel for use where cleanliness is a priority. Used to convert rotary motion to linear travel, the actuators carry loads at speeds up to 70 inches per second, depending on size. Stainless steel components make the actuators suitable for food, drug, packaging, and similar applications where cleanliness and frequent system wash-downs are required.

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Linear Motor Stages

The PlanarDL-series stages from Aerotech (Pittsburgh, PA) are available in nine different travel and performance configuration applications ranging from high-accuracy surface profilometry to high-speed semiconductor and LED wafer scribing. The PlanarDL XY design allows for use in applications where straightness and flatness of motion are critical. Capable of achieving 1 m/s velocities and 1.5 g accelerations, the stages enable high-throughput and the company’s proprietary directdrive technology.

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Instrumentation Valves

Brennan Industries (Cleveland, OH) offers a line of compression-end instrumentation valves available with single or double ferrule-style tube fittings. The NVB Series ball valves range in size from 1/8" to 3⁄4 " and are available in either 316 stainless steel or brass construction. These valves can have two- or three-way configurations and are rated to 3,000 psi. NVN-2200 and NVN-2300 Series screwed bonnet needle valves range in size from 1/8" to 1" and are available with either metal-to-metal or soft-seat stem types. The 316 stainless steel valves are rated to 6,000 psi, and the brass valves are rated to 3,000 psi.

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Linear Actuators

Exlar, a business group of Curtiss-Wright Controls (Chanhassen, MN), offers the K Series™ linear actuators with a 75-mm frame size. They combine roller screw technology in varying performance levels, and allow the use of third-party motors. Along with 60-mm and 90-mm frame sizes, the actuators feature dimensions and form-factor consistent with ISO Metric pneumatic cylinder specifications for pneumatic and hydraulic replacement. They are compatible with any type and style of motor such as DC, stepper, and servo, and offer universal mounting configurations. They offer standard stroke lengths up to 48 inches. The standard body design provides an IP54S sealed housing with options available for IP65S sealing. A variety of materials and coatings is also offered, such as Type III hard coat anodizing, electroless nickel plating, and epoxy coating.

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