Components Showcase: June 20, 1996
Motor drive boasts electronic damping, stall detection.
A microstepping-motor-drive system offers electronic damping and built-in stall verification to provide a greater usable torque and to reduce settling time. The Zeta drive microsteps in 16 standard selectable resolutions of as many as 50,800 steps/revolution. The system comes with one of six industry-standard 1.8° hybrid permanent-magnet stepping motors offered in NEMA 23 and 34 frame sizes with 10-ft motor cables. Prices start at $995. Parker Hannifin Corp, Rohnert Park, CA. (707) 584-2477.
Sealed keypads are virtually indestructible.
Able to withstand the harshest environmental abuse, this line of keypads are vandal-, water-, temperature-, dust-, chemical-, and oil-proof. The manufacturer claims that the products are even explosion-proof. Units use a patented piezoelectric design and totally sealed one-piece solid metal construction. Because there are no moving parts and no material or mechanical fatigue, life expectancy is virtually unlimited. Prices range from $73 to $152. Everswitch, Silver Spring, MD. (301) 680-3100.
Tough keyboards carry LED illumination.
Ruggedized LumineCKS illuminated keyboards are fully compatible with IBM PC/AT and PS/2 PCs, as well as with DEC and other standard computers. When equipped with an RS-232C interface, the keyboard's LED-backlit keys are addressable and can be used for alarm annunciation. The keyboard is protected by a rigid 2-mm-thick steel plate, which is tough enough to withstand a blow from a hammer. The device comes sealed to NEMA 4 or NEMA 4X standards. A 96-key, IBM-format keyboard costs $919. Computer Keyboard Systems Ltd, Santa Monica, CA. (310) 395-4639.
Industrial micromotor delivers as much as 2.2W.
The Series 1727 industrial micromotor measures only 17 mm in diameter and 27 mm in length. The device withstands radial shaft loads of as high as 5N (18 oz), almost five times that of its predecessor. The unit, which weighs just 31g, delivers as much as 2.2W of power, with an efficiency of 74%. Standard versions have an operating temperature range of -30 to +100°C. A mechanical 9-msec time constant ensures responsive acceleration and deceleration. The motor comes with both planetary gearing and encoder feedback. From $65 (OEM qty). MicroMo Electronics Inc, Clearwater, FL. (813) 572-0131.
Mini solenoid stretches battery life.
The SCN1024 C-frame miniature pull solenoid delivers >400,000 actuations at 6V from a single set of four AA batteries. The device mounts on pc boards using solder-terminal pins or optional 1-72 UNF threaded holes on the C-frame. The frame is 0.41×0.46×0.950 in. Standard coils are also offered for 12V- and 24V-dc line operation. Solenoids cost < $2 (25,000). Bicron Electronics Co, Canaan, CT. (203) 824-5125.
Crystals come in glass surface-mount package.
Suitable for wireless, RF, microwave, telecomm, and satellite applications, the ECCM3 and ECCM4 microprocessor crystals are compact glass surface-mount devices with a nominal frequency range of 11 to 120 MHz. The devices feature ±10-ppm tolerance and ±5-ppm stability over a temperature range of -20 to +80°C with minimal board space requirements. The crystals cost $2.50 (1000). Ecliptek Corp, Costa Mesa, CA. (714) 433-1200.
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