Motion Control

DC Micromotors

Pittman® Motors, a division of AMETEK/Precision Motion Control (Harleysville, PA), offers high-performance slotless brushless DC motors for medical applications such as high-speed surgical tools, dental tools, medical instruments, and other small medical devices. The miniature motors produce little or no EMI emission (electromagnetic interference), provide long life, and have low audible noise. In addition, the slotless design eliminates magnetic cogging. The stator teeth are completely eliminated by forming and encapsulating the entire stator winding along the inside surface of the back iron.

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Drives

Danfoss VLT Drives (Loves Park, IL) has introduced D-Frame VLT® drives available in a power range from 125-450 HP (90-315 kW). They leverage back channel cooling to remove 90% of the heat generated by the drive. The drives are available with IP20, IP21 (NEMA 1), or IP 54 (NEMA 12) enclosure protection ratings. They come standard with conformal-coated printed circuit boards, which together with the optional heat sink access panel, help to extend drive lifetime and reliability. The units can be factoryfitted with optional semiconductor fuses. Additional options such as mains disconnect, contactor, and circuit breaker are available.

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Motor Drive Transistors

International Rectifier (El Segundo, CA) has introduced a family of 600V insulatedgate bipolar transistors (IGBTs) for motor drive applications operating below 10 kHz, including compressors for refrigerators and air-conditioners. The Gen7 F devices employ punch-through Trench technology to deliver high power density, and the ability to optimize conduction and switching losses for a specific frequency of operation. They offer smooth switching to reduce EMI and overshoots, and are short-circuit-rated for motor drive applications. The IRG7RC10FD and IRG7IC30FD are co-packaged with a soft recovery diode, while the IRG7SC12F is a single IGBT that allows the designer to choose a specific diode for the application.

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Motion and Automation Control

Kollmorgen (Radford, VA) offers the AKD PDMM that combines a multi-axis motion controller, IEC61131-3 soft PLC, EtherCAT® master, and AKD® servo drive in a single, compact package. The system is suited for applications in printing, packaging, converting, and medical, as well as other automation applications where precise synchronization of multiple axes of motion is vital. It is fully programmable through the KAS Integrated Development Environment (KAS IDE), providing an automation solution that is scalable from a single axis up to 128 axes with a single controller. Features include the ability to master seven or more additional axes over an EtherCAT network, plus additional EtherCAT connected devices such as I/O and MODBUS-connected devices such as HMIs. Kollmorgen Automation Suite is a complete machine automation solution comprised of software, motion components, and engineering services. It simulates the machine’s operation in advance of connecting all components.

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Rod-Style Actuators

ERD electric cylinders from Tolomatic (Hamel, MN) are available with a reverseparallel motor mount that makes a more compact package. The motor is mounted in parallel with the actuator instead of inline, which reduces the length of the total package and, with the addition of a rear clevis pivot mount, provides greater versatility in mounting the actuator. The ERD is a rod-style electric actuator designed as an alternative to pneumatic cylinders, and as an option for automating manual processes. The products are suitable for product changeovers, pick-and-place, pressing, diverting, and heatstaking/ sonic welding. The actuators can be built in stroke lengths up to 24" (609.6 mm). The cylinders are available in four body sizes that are approximately equivalent to 5/8" (15.9 mm), 1" (25.4 mm), 1.5" (38.1 mm), and 2" (50.8 mm) bore pneumatic cylinders. They are available in stroke lengths from 8 to 24" (203.2 mm to 609.6 mm), and forces up to 500 pounds (2,224 N). They are compatible with most NEMA and metric mount stepper and servo motors.

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Linear Positioning Stages

Mini-MAG precision linear positioning stages from Dover (Boxborough, MA) are available with a complete controls package. Users can combine a Mini-MAG linear motor stage with a board-level, single-axis servo drive for integration into a control cabinet, or a Kollmorgen AKD™ servo drive for single- or multi-axis applications with a graphical user interface for setup and programming, and realtime performance feedback. Both options provide Ethernet communication for data acquisition.

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Linear Actuator

BEI Kimco Magnetics (Vista, CA) has introduced the Model LA100-93-000A high force linear actuator with a peak force of 500 pounds. It features a continuous force of 292 pounds with 2" total stroke. Other features include semi-housed construction with built-in shaft and bushings that orient the coil assembly concentric to the field assembly. The unit measures 10" in diameter and 9.3" long at mid-stroke. The LA100 is suitable for use in applications that require an actuator force of 500 pounds and high speed.

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