Features

Stepper Motor Controller

Prior Scientific (Rockland, MA) introduced the PriorPCI2 High Speed Stepper Motor Controller, featuring a 175 × 106 mm design; standard six-axis control for XY, focus, and three filter wheels; shutter control for three shutters; and a 16-bit analog (0-10 V) output for piezo control. Other features are four TTL I/O, updated DLL for Prior’s Lumen 200Pro Illumination System, and microstepping resolution down to 0.01 μm for XY and 0.002 μm for focus. The card is CE and RoHS compliant.

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Voice Coil Stage

From PI L.P. (Auburn, MA), the V-106 QuickScan™ series of PCI-card-driven, high-speed voice coil positioning stages provides resolution to 100 nanometers. The unit features cross-roller bearings, scanning frequency of several tens of Hz, travel ranges of 20 mm and 6 mm, velocity to 240 mm/sec (9.6 inch/sec), and a direct metrology linear encoder. Settling time is 75 ms for 5 mm step. Applications include scanning, fiber optics, laser beam control, and biotechnology.

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Controller ICs

Fairchild Semiconductor (South Portland, ME) released critical conduction mode (CRM) power factor correction controller (PFC) integrated circuits (ICs), the FAN7529 and FAN7530. Both units use a variable on-time control method for Total Harmonic Distortion performance (

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Rotary Encoder ICs

Austriamicrosystems (Unterpremstaetten, Austria) released the AS5030 and AS5130, two 8-bit absolute magnetic rotary encoder integrated circuits (ICs) with pushbutton and low-power-mode features. Both units provide an angle resolution of 1.4 degrees over a full 360-degree turn (8-bit), accessible via digital serial interface (SSI), or via pulse width modulated (PWM) outputs. Other features of both devices are user-defined magnet-to-magnet displacement thresholds and operation in low power mode. Both can be configured to provide data via serial interface, PWM, or daisy chain. The units operate at 5 V supply voltage, cover a temperature range from -40 to 125°C, and operate at speeds of up to 30,000 rpm.

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Digital to Synchro Converters

Computer Conversions Corp. (East Northport, NY) introduced a series of Digital to Synchro Converters with 14-, 12-, or 10-bit resolution that can provide up to 25 VA and are designed to drive torque receivers with accuracies of up to ±10 minutes of arc. The unit is unaffected by overload and transient conditions. At 4.5 × 9.25 × 1" (400 Hz), units accept a 14-bit natural binary angle and convert it into 3-wire synchro or 4-wire resolver signals. The output is protected from shorting and thermal overload. Available output voltages are 90 or 11.8 V RMS L-L, 60 or 400 HZ. Digital inputs are TTL/DTL compatible. Operating temperature ranges are 0 to 70°C or -55 to 85°C. Synchro output is transformer-isolated in most models.

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Brush-Commutated Gearmotors

AMETEK Technical & Industrial Products (Kent, OH) released a line of PITTMAN® brush-commutated DC gearmotors that provides output torque up to 175 oz-in with standard sintered steel spur gearing and output torque up to 500 oz-in by incorporating select gear ratios and high-strength gears. The units come in three series and varying lengths: the GM8000 motors are available with a range of 11 standard reduction ratios from 6.3:1 to 1,803.6:1. The GM9000 models offer 12 ratios from 5.9:1 to 4,732.5:1. The GM14000 line features four ratios from 5.9:1 to 218.4:1. Armatures are skewed to lessen magnetic cogging and windings are resin-impregnated. Two-pole permanent magnet stators are constructed with ceramic magnets in steel return rings. Diamond-turned commutators augment brush life. Customization is optional.

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Aluminum-Housed Step Motor

Danaher Motion (Wood Dale, IL) introduced the CT Series Step Motors, which use less power to provide more torque, augmenting operating efficiency and machine throughput. Standard and custom motors are available in NEMA 17, 23, and 34 frame sizes. The units feature a large bearing system to accommodate high thrust loads and high side loading. This allows the load to mount directly to the motor shaft. High-voltage insulation allows the motors to be used with high-voltage drives. An aluminum housing improves heat dissipation and provides higher torque output. Applications include textile and semiconductor equipment.

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