Motion Control

Speed Controls

Four controls from Bodine Electric (Northfield, IL) provide speed control for low-voltage 12 or 24V permanent magnet DC (PMDC) gearmotors and motors (up to 1/3 HP/250 Watts). The controls utilize pulse width modulation (PWM) technology for quiet operation, low operating temperature, and optimal brush life. The controls feature five trim pots to adjust min/max speed, torque (current) limit, and acceleration time. In addition, DIP switches allow the user to match a motor/gearmotor to the controls. System speed may be controlled with a single-turn speed pot, or an isolated 0-5 VDC remote signal. Models are available with either 1⁄4" quick connect tabs or a plug-in terminal block. The type WPM low-voltage motor speed controls are suited for portable or remote applications where connection to an AC line is not possible. Typical applications include accessories on electric vehicles, mobile medical equipment, solar powered devices, chemical injection pumps at oil wells, and automatic gate openers.

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Linear Motion Platform

PBC Linear®, a Pacific Bearing Company (Roscoe, IL) has introduced the SIMO® Series linear motion platform. Options allow a design engineer to meet multiple application requirements with a single platform. Options include a low-profile rail for tight spaces or a tall version for greater structural integrity. Each aluminum base rail is qualified with the SIMO process (Simultaneous Integral Milling Operation). Three bearing tribologies are available: self-lubricating FrelonGOLD® plain bearings for contaminated environments, V-wheel roller bearings for high-speed applications, and profile rail linear guideways with recirculating ball bearings for rigidity and precision. Three drive types are available: lead screw with machined nut or anti-backlash nut, ball screw, or two versions of belt drives.

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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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