Features

Linear Bushing

THK America (Schaumburg, IL) has introduced a self-adjusting power linear bushing with cages engineered of resin that continually lubricates the rolling elements. The bushing also features a hardened steel ball plate with a ground groove that is slightly larger than the ball, which results in increased contact area between the ball and the ball plate. The ball retainer and outer sleeve are made of a lightweight, low-friction, wear-resistant synthetic polymer, allowing for quiet operation. The convex shape of the ball plate provides a pivot point at the center, which permits self-adjustment up to 0.5°.

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Piston Pumps

The Series 2665/2685 WOB-L piston pumps by Thomas Products Div. (Sheboygan, WI) incorporates epoxy-coated head and valve plates for exterior corrosion protection, aluminum construction, and a Teflon piston seal that remains flexible even in cold. The pumps are intended for use where fan guards are not required; Series 2685 pumps include a stainless steel fan guard. Oil-less, non-lube pistons and cylinders prevent airflow contamination, while twin fans provide cooling of the motor and cylinder. All series 2265/2685 pumps provide up to 100 psi of pressure, and a pressure relief valve is also included. Thermally protected AC motors are of ultra-reliable permanent split capacitor design. Maximum flow for pumps equipped with 115 VAC 60 Hz single phase motors is rated at 3.68 CFM; maximum flow for pumps equipped with 220-240 VAC 50 Hz single phase motors is 3.23 CFM.

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Brushless Servomotors

PennEngineering® Motion Technologies (Harleysville, PA) offers the MAE® Series BM brushless servo motors that can be equipped with Hall effect sensors and encoders. The motors feature copper integrated in the stator’s winding. They are available in nine models incorporating four- or eight-pole stators. A rotor structure allows maximum magnetic flux. Motor lengths range from 55 mm to 274.5 mm, and external diameters range from 5.1 cm to 10 cm. Rated torque up to 6 Nm and peak torque up to 18 Nm can be reached, depending on the model. The servomotors can be mounted with flanges.

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Conveyor System

The Quickdraw® conveyor system from MagStar Technologies (Hopkins, MN) is designed for lab and cleanroom environments. It stands 2-7/8" and is only 1-1/2" wider than the transport tray. It uses sealed ball bearings rather than belts. The unit allows for variable speed, bi-directional transport, changeable layouts, and precision stopping for tight-tolerance processing. Integrated sensors provide users with conveyor control within specific conveyor zones. The control system is self-contained with plug-and-go operation so no PLC is needed for setup or operation. Sensor, logic, and motor controls are built into the rail for easy access.

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Linear Actuators

The A-Track Series linear actuators from Warner Electric (South Beloit, IL) include a round, ground ball nut, a motor shaft supported by bearings rather than bushings, and limit switch and potentiometer options. The series has four models. All are compact, and will move loads ranging from 25 to 1,330 pounds. They can be located in confined areas and are weatherproof. Maintenance is not required.

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Variable Frequency Drives

AC Technology, a member of the Lenze Group (Uxbridge, MA), has introduced the SMVector drive, featuring a power range of up to 20 Hp. Four modes (v/Hz, enhanced V/Hz, vector speed, and torque), high starting torque, auto-tuning, low-speed control, and dynamic speed regulation are provided. The unit’s input voltage ranges from 120 VAC 1-phase to 600 VAC, 3-phase. The drive also includes an Electronic Programming Module, which is the drive’s memory in a removable chip, allowing users to program multiple drives quickly.

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Servo Converters

The KE/KW series of digital intelligent servo converters from AMK Drives and Controls (Richmond, VA) is comprised of infeed and modules in the power range up to 60 kVA. A compact system, the unit measures 170 × 320 × 160 mm. Using coldplate cooling, power losses in the control cabinet are reduced by placing the unit on a cooled backplane. Up to 32 synchronous servo axes can be controlled for each infeed module, allowing freedom to position the modules.

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