Motion Control

Slotless Frameless Motors

Applimotion (Loomis, CA) has introduced new models of the UTS slotless frameless direct drive motors in sizes from 12 mm to 300 mm diameter. The motors feature zero cogging and sinusoidal torque curves. With large through holes and thin radial cross-section, the frameless kits integrate into gimbal, rotary stage, or automation platforms. The motors offer smooth electromagnetic rotation when integrated with a servo control system with high-resolution encoder and sinusoidal current control amplifier.

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Electromagnetic Machine Software

SPEED 2012 software from CDadapco (Melville, NY) consists of five machine programs: PC-BDC (Brushless PM Motors), PC-IMD (Induction Motors), PCDCM (DC Brush Motors), PC-WFC (DC and AC Wound Field Motors), and PC-SRD (Switched Reluctance Motors). Each program is intended for designing and calculating a range of electromagnetic machine performances. A number of templates are used to establish the machine’s dimensions, assist in laying out the winding, select the desired materials, and compute the machine’s performance at a single operating point, or over an entire speed/torque range. A link to the software’s FEA program PC-FEA offers analysis of fine details.

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Variable Speed Drive

The Drives & Motion Division of Yaskawa America (Waukegan, IL) has released the P1000 variable speed drive that provides control for variable-torque loads through 500. Configuration tools include a multi-language LCD display with a real-time clock, parameter storage, fan and pump application presets, and a portable USB copy unit. DriveWizard® computer software delivers configuration, monitoring, and trending functions enhanced by direct connectivity through the drive’s USB port. The drive offers three expansion ports for additional I/O, feedback, and network communications, including DeviceNet, EtherNet/IP, Modbus TCP/IP, Profibus-DP, PROFINET, BACnet, and Lonworks.

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Synchronous Motors

Bauer Gear Motor, an Altra Industrial Motion Company (South Beloit, IL), offers a range of permanent magnet synchronous motors (PMSM). The motors employ a rotor design that integrates embedded permanent magnets made from the rareearth material, instead of the squirrel-cage rotor found in induction motors. The motors offer high efficiency under rated operating conditions and high power density. They are available in ventilated and nonventilated configurations across the power range from 0.55kW to 15kW. They operate on 380V to 500V power supplies, and are rated for inverter duty. Applications include fans, pumps, and compressors; and constant torque applications such as elevators and conveyors.

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Rotary Stages

Aerotech (Pittsburgh, PA) offers the MPS-GR series rotary stages available in two sizes: the MPS50GR and MPS75GR. They incorporate wormgear drive and bearing components for repeatable positioning, and are available with DC servo or stepper motors and either a 20-mm (MPS50GR) or 30-mm (MPS75GR) clear aperture. The clear aperture allows the stages to address applications requiring a through-hole or accommodations to mount an optic, including articulation of beam polarizing lenses, through-holes for cabling or air lines, or vision/camera/inspection applications. The DC servomotors for the stages are equipped with a square-wave rotary encoder, and the MPS75GR includes a manual adjustment knob.

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Measuring Wheel Encoder

Baumer (Southington, CT) offers the MA20 measuring wheel encoder for flexible position and speed feedback for conveyor systems. The two-in-one device combines a high-resolution optical incremental encoder and a precise measuring wheel. Capable of resolutions as high as 25,000 ppr, the encoder provides precise measuring results at very low conveyor speeds. The encoder’s HEX switch allows the user to select from 16 predefined resolutions between 100 and 25,000 ppr.

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Linear Stages

PI (Physik Instrumente) LP (Auburn, MA) offers PI miCos precision linear stages. More than 20 product families are available, including miniature translation stages and positioning ranges of 40-mm to high load, and linear translation stages for travel ranges to 1 meter. The motorized precision positioners come in a variety of standard and custom versions. The stages are available as open loop stages with stepper motors, and leadscrew drive to high-speed models with linear encoders featuring up to 1-nanometer resolution. Most stages also come in vacuum-compatible and cleanroom- compatible versions. Users can choose among rotary servomotors, linear servomotors, and stepper motors. Closed-loop models are offered with high-resolution position feedback.

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