Products

Magnetic Ring Encoder

ASM Sensors (Elmhurst, IL) offers the PMIR7 series POSIROT® incremental en coder magnet rings in three sizes for different shaft sizes. They yield up to 184,320 pulses per revolution in conjunction with the quadrature encoder read head. The encoder system consists of a magnetoresistive read head, PMIS4, and a dual-channel magnetic ring. The sensor head is enclosed in a metal housing and generates A, B, Z output pulses for quadrature detection with reference mark. The rings come in three sizes that can be press-fitted onto 27, 35, or 50-mm shaft diameters. The metal housing provides protection against EMC interference and thermal overload. The ring sizes offer decade, binary, or degree division that produce up to 102,400, 131,072, or 184,320 pulses per revolution, respectively. The available outputs are HTL, TTL, and TTL24V with a maximum output frequency of 480 kHz.

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Stages

The MS-2500 stage from Applied Scientific Instrumentation (Eugene, OR) provides 100 mm of Yaxis travel and 250 mm of X-axis travel, and works on existing inverted microscopes. Custom configurations are available, including front-loading stages with over 300 mm of Y-axis travel. The stage accepts standard 160 × 110 mm or wide 283 × 110 mm stage inserts. All axes derive their control through a closed-loop DC servomotor with high-resolution encoders for positioning feedback. The XY stage uses crossed-roller slides, lead screws, and zero-backlash miniature geared DC servomotors for accurate motion. The stages come standard with rotary encoders with resolution of 100 nm and bidirectional repeatability better than 800 nm rms. Controller options include rack mount, compact tabletop, and OEM board level. The controllers accept industry-standard commands, provide automatic backlash correction, and allow RS-232 and USB communication with a host computer.

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Hybrid Stepper Motors

Servo2Go (Greenville, DE) has introduced the Applied Motion Products HT24 NEMA 24 frame series of hybrid stepper motors for applications where additional power is required, but changing to a size 34 motor is not possible. The motors are available with single or dual shafts, and are optimized for microstepping. Optional encoders, gearheads, and brakes are available. Three different stack lengths with holding torques ranging from 123 to 354 oz-in are available. The motors have four leads and are suitable for bipolar and unipolar connections.

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Diaphragm Pump

The 1410 Series DC miniature diaphragm pump from Thomas Division (Sheboygan, WI) measures 3.3 × 1.2 × 2.1" and is designed for medical and other applications requiring high performance in a compact package. The pump features maximum flow of 4.3 lpm, with a maximum pressure of 27.5 psig, and a maximum vacuum of 22.0 in.Hg. The pump weighs 0.4 lb., features a low sound level, and is EMC suppression qualified to EN55011-B on some designs.

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Nanopositioning Controller

PI L.P. (Auburn, MA) has introduced the E-709 digital piezo nanopositioning controller that features fifth order polynomial digital linearization, two notch filters for piezo operation at high frequencies, and DAC-in-the-loop architecture for positional stability. High-speed interfaces include USB, RS-232, Real-Time Analog, and TTL. Setup software enables remote access and servo tuning. The controller includes a piezo power amplifier, and can be used in applications providing analog control signals.

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Rail Brakes

RB Series Generation II linear profile guide rail brakes from Nexen Group (Vadnais Heights, MN) are designed for stopping and holding in e-stop and power-off situations. Each rail brake clamps directly onto the center of the guide rail to provide positive braking and holding on all axes, with no effect on the bearing surfaces. The field-adjustable friction facing contact area minimizes rail wear. No lubrication or periodic maintenance is required, and the brakes fit most popular profile guide rails. Other features include low backlash, brake geometry similar to linear bearing cassettes, large clearance area between the brake and rail, and static holding cycle life in excess of one million cycles.

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Motor Control Platform

XMOS (Sunnyvale, CA) has released a motor control platform that contains XCore® processors, an XMOS motor control hardware board with support for dual axis motor control and communication, and a suite of control, processing, and interfacing functions to help designers develop motor drives in high-level software programming languages. The XCore processor architecture, combined with the XTA static timing analysis tool, provides a programmable platform, which executes software without requiring an RTOS. The XS1-L1 500 MIPS processor handles three-phase BLDC motor control loops, while the XS1-L2 1000 MIPS processor manages communication, logging, and motion control.

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