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Rotary Position Sensors

Bourns (Riverside, CA) has introduced the Bourns® Model AMS22U and Model AMM20B non-contacting rotary position sensors for rugged environments. They utilize magnetic Hall Effect (HE) technology, and are designed for pneumatic control valve position feedback, actuator motor position feedback, lift/shuttle suspension systems, and tilt control feedback. The Bourns® Model AMS22U is a single-turn, non-contacting rotary position sensor that offers a rotational life of up to 100 million cycles, and features a 1/8" shaft supported by dual ball bearings and a factory-programmable electrical angle from 10 to 360 degrees. The Bourns® Model AMM20B is a multi-turn, noncontacting rotary position sensor that features a rotational life of up to 50 million cycles. It features a slim profile for space-constrained applications, 12-bit resolution, and a factoryprogrammable electrical angle from 1080 to 3600 degrees.

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Controllers

The Simatic S7-1500 controllers from Siemens Industry (Chicago, IL) feature integrated motion control, security, and safety functions, as well as a color display. The controllers feature a backplane bus with a high baud rate and efficient transmission protocol, and have have two built-in, standard Profinet interfaces. The largest controller in the line has an additional Profinet interface onboard with a separate IP address, allowing network isolation to integrate into the corporate network.

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Cartesian Robot

IAI America (Torrance, CA) offers a Cartesian robot with commanded acceleration of up to 3.2 G (maximum instantaneous acceleration: 4.8 G). The dedicated cast aluminum frame ensures high rigidity. The shape and vibration damping of the fastening brackets for XY-axes reduce the vibration at the tip of the Zaxis, while the vibration control function of the XSEL controller reduces vibration during highspeed operation. A wide operation range of 400 mm (X-axis) × 300 mm (Y-axis) is provided. The high-speed Cartesian robot combines single- axis robots, each performing linear motion, for straight-moving performance.

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AC Vector Drives

The SK 200E series distributed size 4 AC vector drives from NORD Gear Corp. (Waunakee, WI) offers power capacity to 30 HP. The drives are capable of operating up to 15-HP motors on 200 to 240 VAC 3-phase power, and up to 30-HP motors on 380 to 500 VAC 3-phase power. The drive mounts directly to the motor and not in the control panel. The drive offers sensorless current vector control (ISD), plug-in memory-storage module (EEPROM) for storing application-specific drive settings on a transferrable memory module, diagnostic LEDs, internal 24V control power supply with the option to provide external 24V control power, and POSICON positioning control with incremental or absolute encoder feedback.

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Lens Actuator

New Scale Technologies (Victor, NY) offers the UTAF (ultra-thin auto focus) piezoelectric lens actuator module that measures 8.5 × 8.5 × 3.8 mm. The module integrates the company’s UTAF piezoelectric beam motor with a drive IC and position sensor IC for closed-loop motion control. A pin bushing system moves the lens in a straight line with dynamic tilt of less than 0.1 degree, a requirement for high-megapixel cameras and imaging systems. A flexure preload or magnetic preload system produces substantially zero additional friction in the bearing guide, irrespective of the location along the optical centerline. This allows the module to lift a mass at least three times greater than the typical lens mass of 0.25 grams, insuring a low sensitivity to gravity orientation for the camera system.

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Gear Reducer

The Able VRB Gear Reducer from Shimpo Drives is available from Servo2Go.com (Greenville, DE), and is suited for packaging machinery, medical equipment, and assembly cell automation. The standard mounting is a through-bolt style. The maximum output torque peaks at 2,300 in-lbs. It provides high-precision backlash rating of

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Robotic Accuracy Improves Aerospace Manufacturing

Where accuracy is concerned, robots have traditionally relied on repeatability. In the past, robotic accuracy has not been developed to a level of maturity acceptable to standard production processes. Critical aerospace manufacturing techniques such as fastening and drilling were historically not held to tight tolerances. Typical tolerances for airframe assembly fastening were in the +0.030" range. The standard is set by the positional requirement for drilling of fastener holes, which is a key target application for robotics in manufacturing.

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