Motion Control

Servo Motor

Beckhoff Automation (Burnsville, MN) has released the AM8000 servo motor series featuring single-cable technology that combines the power and feedback system into one standard motor cable. The encoder data, rotor position, multi-turn information, and status of the thermal conditions in the motor are transmitted via a digital interface. The series consists of six different motor sizes, each with two or three optional overall lengths. Users can select from a stall torque range of 0.9 to 65 Nm. Salient pole winding technology is used in the rotor, which enables a higher slot fill factor. Small end turns, in conjunction with a fully encapsulated stator, provide thermal management.

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Digital Torquemeter

The MCRT® 88700V dual-range digital torquemeter from S. Himmelstein (Hoffman Estates, IL) measures torque even if the ratio of peak to average torque is high, such as when starting, stopping, or reversing highinertia loads. When peak torques are unknown, the torquemeter reduces the risk of damage from unexpected or accidental torque spikes. The unit features three simultaneous analog outputs that can be individually set to 5 or 10V at each range full scale. Over-range is 150 to 300%, and mechanical overload is 200% of the high range and 1000% of the low range. Digital output of torque, and speed and power with option Z, is available over the resident RS-232 serial port. Included software interfaces with Windows-based PCs for data display and collection, and instrument setup.

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Acceleration Sensors

Bosch Sensortec (Reutlingen, Germany) has introduced the BMA280 and BMA255 triaxial acceleration sensors with 14-bit and 12- bit resolutions, respectively. The sensors are available in a 2 × 2 mm LGA package and measure changes in acceleration as low as 0.25 milli-g. They feature a low noise level of 120 micro-g/vHz for the BMA280, and 150 microg/ vHz for the BMA255.

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Digital Servo Drive

Servo2Go.com (Greenville, DE) offers Applied Motion Products’ SVAC3 Series digital servo drives. The AC powered drives can be controlled via analog signal or step and direction inputs. They also can be programmed to act as standalone units. All models include Ethernet/ IP industry-standard network communication with connection to the supplied Windows software for configuration and tuning. Applications can communicate in real time using the SCl and Q languages over standard 100-Mbit Ethernet cabling, addressing, and protocols.

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Brushless Motors

The Gen2.0 PremiumPlus+™ brushless permanent magnet motors from NovaTorque (Sunnyvale, CA) are driven by variable frequency drives and feature a fluxfocusing stator and rotor hub geometry. The motors feature all-ferrite magnets, and are packaged in standard NEMA frame sizes and mounting dim ensions. Due to high power density, the motors are available both in the mounting frame size typical for induction motors, as well as one frame size smaller.

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Actuators

Exlar Corp. (Chanhassen, MN) offers the Tritex II™ DC-powered actuators that integrate power and control electronics with brushless servo motors and actuators in one package. The actuators are combined with electronic power and thermal management modeling. They offer continuous forces of 1,000 pounds, 1,300 pounds peak, and speeds reaching 33 in/sec. The servo drive, digital positioner, and actuator are housed in an integrated package, creating a self-contained motion control system.

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Accelerometer

Silicon Designs (Issaquah, WA) has introduced the Model 2210-005, a ±5g, low-noise, single-axis accelerometer module that incorporates MEMS capacitive sensing elements. The sensing elements are packaged within a lightweight anodized epoxy aluminum housing, occupying a footprint of one square inch. The accelerometers feature a four-wire connection and internal voltage regulator, as well as high-drive, low-impedance buffering to support low-frequency acceleration measurement requirements from 0 to 400 Hz.

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