Rotary Ball Spline

NB Corporation of America (Hanover Park, IL) released a rotary ball spline that can be used for both rotational and linear motion. Applications include SCARA robots, the vertical shaft of assembly equipment, automatic tool changers, and loaders. The rotary ball spline has a nut that rolls on the ball spline shaft, providing sub-millimeter accuracy. Splines feature arch-shaped grooves on both the shaft and inner portion of the cylinder that approximate the diameter of the ball bearings, allowing them to carry a high load in a linear motion.

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Inertial Measurement Unit

Bosch Sensortec (Kusterdingen, Germany) offers the BMI270 ultra-low-power smart Inertial Measurement Unit (IMU) for wearable applications that combines gyroscope technology and an accelerometer. It includes intuitive gesture, context, and activity recognition with an integrated plug-and-play step counter for wrist-worn devices. The IMU is also suited for other types of wearable devices such as hearables, smart clothes, smart shoes, smart glasses, and ankle bands. The IMU features current consumption of 30 μA and is available in two versions: a gesture version and a context and activity version.

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Electromagnetic Clutches

The CSZ electromagnetic clutches from Miki Pulley (Plymouth, MN) have a zero-backlash design and provide connection between a motor and a load with low inertia and minimal drag. The clutches function using the magnetic force generated by the energized coil, providing engagement of input and output members of the clutch. They feature an integrated bearing design and operate in temperatures from 14 °F to 104 °F (-10 °C to 40 °C). The clutches are available in bores ranging from 10 to 15 mm.

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Linear Stepper Motor

Nippon Pulse (Radford, VA) introduced the PFL20 Linearstep stepper motor, a tin-can linear actuator with a 20-mm diameter and a bipolar winding. It is RoHS-compliant, has a 30/60-mm effective stroke, and can reach 6 N of force at 200 pps. With 24 steps per revolution, the lead screw has a 1.2-mm thread pitch and reaches 5V rated voltage, resistance of 33 Ohms/phase, and inductance of 12 mH/phase. The structure of the motor — a threaded rotor hub and lead screw — helps to save space due to fewer components. The motor can be ordered with unipolar or bipolar windings and a variety of usable voltages. In addition to the 20-mm motor size, it is also available in 25-mm (captive or non-captive option) and 35-mm diameter sizes.

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Smart Motors

TRINAMIC Motion Control (Hamburg, Germany) released PD42-x-1670 smart BLDC motors designed for 4,000-rpm nominal velocity and 6.25 to 18.5 Ncm rated holding torque. The BLDC PANdrive comes with two firmware options: TMCL™ and CANopen. The motors feature a Hall-based rotary feedback system and are integrated in PLC environments or in standalone applications. The motors come in three lengths, each with 42-mm flange size brushless motors, and work with a 24V power supply. Features include supply voltage of 10 to 28 VDC and 5.2A RMS.

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Linear Motors

The SDLM-025-070-01-01 and SDLM-025-070-01-05 direct drive linear motors from Moticont (Van Nuys, CA) have built-in encoders and feature high speed, high resolution, zero backlash, and zero cogging. The motors are 1" (25.4 mm) in diameter and 2.75" (69.9 mm) long. Protected inside the motor housings are linear optical quadrature encoders that directly connect to the non-rotating shaft. The motors have a stroke length of 0.500"(12.7 mm), a continuous force rating of 22.2 oz. (5.9 N), and peak force of 67.2 oz (18.7 N). The non-commutated motors offer direct coupling of the load or stage to eliminate backlash and enable high acceleration/ deceleration. Both ends of the motor and shaft ends are drilled and tapped for integration into new and existing applications.

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Closed-Loop Controllers

Prior Scientific (Rockland, MA) announced Queensgate NanoScan NPC-D-6000 Series multi-channel closed-loop controllers. Both the single-and multi-channel digital nanopositioning controllers are designed to operate in a closed-loop feedback mode with stages or actuators incorporating capacitive position sensors. The controllers can control up to three piezo-driven actuators and two- or three-axis nanopositioning systems.

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