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Brushless dc motor
MicroMo Electronics Inc., Clearwater, Fla.
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The company has expanded its brushless dc motor line with the addition of
its Series 2057B. With an external motor diameter of only 20 mm and a length
of 57 mm, the power-to-volume ratio is significant, according to the company.
The motor uses the System Faulhaber skewed winding in combination with a
rotor made of neodymium rare-earth magnets to provide cog-free motion. Due
to their electronic commutation, the service life of these motors is limited
only by the bearings. The brushless dc motor can achieve a continuous output
torque up to 18 mNm at speeds up to 58,000 rpm. The brushless dc motor comes
in a sterilizable version capable of withstanding an autoclave environment.
The housing of the motor is black to facilitate optimal heat dissipation.
This motor is useful for applications such as medical or dental hand pieces.
It can be combined with a gearbox and encoder for a complete miniature dc
drive system.
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Thin beam load cells
Omega Engineering Inc., Stamford, Conn. |
LCL Series thin beam load cells are
suitable for small load measurements. The series measures force or weight.
The load cells are designed to measure in many different applications found
in medical instrumentation, home appliances, process control, robotics,
automotive, and many other high-volume applications. A specially developed
integrated strain gauge includes 4-active arm full bridge, and all balancing,
compensating, and conductive elements, and is laminated to the beam to provide
stability and reliability. Mounting hardware is also available. All models
cost $69.
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Temper-
ature cali- brators
Wahl Instruments Inc., Asheville, N.C. |
Pocket temperature calibrators were
designed to simplify the maintenance and commissioning of today's
reliable and accurate thermocouple and RTD probes and transmitters in the
harshest environments. The Wahl TC621 pocket thermocouple calibrator can
both measure and simulate with a high accuracy of 0.02 percent of reading,
a temperature coefficient as low as 15 ppm/°C, and 14 different thermocouple
outputs. The Wahl TC622 pocket RTD calibrator can both measure and simulate
with an accuracy of 0.02 percent of reading, a very low temperature coefficient
of 10 ppm/°C, and 12 different RTD types. Both models feature a simulation
mode to create simple and cyclical ramps, synthesizer mode for sending predefined
values with pro- grammed frequency, and steps mode for sending values with
programmable frequency and amplitude. Scaling
allows for the correction of probe errors and is performed using up to 10
segments.
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Force sensors
PCB Piezotronics Inc., Depew, N.Y. |
Series 260A triaxial piezoelectric
force sensors from the company's Force/Torque division, available in ICP
and charge output versions, simultaneously measure dynamic and quasi-static
forces in three orthogonal directions (x, y, and z
axis). The sensors are used to study large, off-highway vehicle chassis
dynamics at interfaces between shock absorbers, struts, hydraulic actuators,
or other chassis components, such as those typically found on dump trucks,
payloaders, backhoes, and bulldozers. Triaxial force sensors supplement
vibration measurements in vehicle testing by providing the input force that
drives the dynamic response, for example, from the motor mounts or hydraulic
actuator to the rest of the vehicle. Testing includes modal analysis, durability
and fatigue life, and ride quality studies. Series 260A sensors feature
full-scale measuring ranges from 500 lbs. to 4,000 lbs. (2.2 kN to 18 kN)
in x and y directions, and from 1,000 lbs. to 10,000 lbs.
(4.5 kN to 45 kN) in the z direction. Single-axis models are also
available.
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Potenti- ometer
Spectrum Sensors & Controls, Grass Valley, Calif.
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A miniature square motorized potentiometer
provides greater reliability while using less space. Featuring a 1.550-in.
square mounting flange, the design of the potentiometer stepper motor incorporates
200 steps for a smoother output and longer service life. This motorized
potentiometer is useful for medical shutter control sensor applications.
Spectrum's motorized potentiometers use a co-molded conductive plastic
element for a hard smooth surface and greater long-term reliability compared
to raised circuit element potentiometers, according to the company. In Spectrum's
process, the termination and resistance materials are simultaneously molded
with the base substrate. This new stepper motorized potentiometer has a
minimum proven rotational life of 50 million cycles.
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Position sensors
ASM Sensors Inc., Elmhurst, Ill. |
The PCST26 series of Posichron magnetostrictive position sensors has been
designed for use inside of mobile hydraulic cylinders with reduced installation
space. A compact stick design, separate sensor electronics, and the protection
class IP69K make the sensor most suitable for hostile applications environments.
Posichron is an absolute, contact-free, and wear-free position sensor measuring
system. The sensor carries out an absolute position measurement and is equipped
with analog outputs 0-10 V, 4-20 mA, and alternatively with a digital pulse
output Start/Stop or synchronous serial interface (SSI). The PCST26, which
can be integrated trouble-free into hydraulic control systems, has a variety
of mounting flanges, possesses high electrical compatibility, and is strongly
resistant to shock and vibrations.
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Contour- ing control
Heidenhain Corp., Schaumburg, Ill. |
The TNC 320 is a full-function control
that incorporates the best features of the company's high-end flagship
iTNC 530 control, including the ability to control five axes, but at a lower
cost. Reasons include the TNC 320's analog drive interface, making
it useful for interfacing to existing drive systems on retrofit applications,
and its one-piece construction that minimizes cable runs. The TNC 320 sports
a 15-in. TFT color flat-panel display (1,024 x 768 pixels) with programming
graphics and on-screen user support. Its powerful main computer has a large
number of onboard cycles to simplify most machining operations, from drilling
and milling to workpiece probing. Heidenhain conversational programming
is standard and G-code programming is now possible with the addition of
a USB keyboard. The compact flash memory card, along with its insensitivity
to vibration and shock, stores the PLC program and commissioning information.
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Vibration monitoring
Emerson Process Management, Knoxville, Tenn. |
The company now makes vibration monitoring
of rotating equipment possible in hazardous areas of chemical and petrochemical
process plants and refineries. Two new safety-rated versions of the CSI
2130 Machinery Health Analyzer are available for evaluating the condition
of various equipment types in hazardous work areas. Both versions comply
with rigorous international safety standards, extending the use of the tool
for fast, accurate assessment of the condition of rotating machinery to
the most sensitive plant environments. The safety-certified versions of
the CSI 2130 retain all functions of the machinery health analyzers commonly
operating in other areas. They are capable of gathering large amounts of
data and reducing it into accurate diagnostics and actionable information.
The collected data are uploaded for analysis and trending to the AMSSuite
Machinery Health Manager software, a component of Emerson's PlantWeb
digital plant architecture.
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Cooling pump
Flowserve Corp., Dallas, Texas |
The Guardian 3000 electronics cooling
pump is the company's first production pump designed for use in cooling
computer processors and graphics chips in high-end consumer personal computers.
About 90 mm (3.54 in.) in length and 36 mm (1.42 in.) in diameter, the Guardian
3000 is the smallest pump ever developed by Flowserve. While the largest
pump ever built by Flowserve has an impeller diameter of 4.24 m (13.9 ft.)
and would fill an Olympic-size swimming pool in 25 seconds, the Guardian
3000 has an impeller diameter of less than an inch and would take nearly
three minutes to fill a kitchen sink. The Guardian 3000 addresses a tough
challenge facing computer and processor manufacturers today, according to
the company—how to cool computers' electronic components within
limited dimensional, cost, and power budgets. An overhung centrifugal, nonmetallic,
magnetic-drive, seal-less pump, the Guardian 3000 is powered by an integral
brushless 12-volt dc motor.
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Spherical plain bearings
SKF USA Inc., Kulpsville, Pa. |
SKF spherical plain bearings provide
ready-to-mount bearing solutions for a range of industrial equipment applications.
These types of self-aligning bearings can simultaneously accommodate misalignment
and oscillating movements while delivering optimized performance in cranes,
conveyors, forklifts, hydraulic cylinders, mobile construction and agricultural
equipment, industrial robots, mineral-processing equipment, food and beverage
machinery, packaging equipment, and other applications. SKF spherical plain
bearings exhibit high load-carrying capacity and have been engineered for
long life, high reliability, and minimal maintenance. The bearings are available
in metric or inch dimensions with or without seals. They feature an inner
ring with a sphered convex outside diameter and an outer ring with a similarly
sphered but concave inside surface. According to the manufacturer, this
design makes them suitable for arrangements where alignment movements between
shaft and housing must be accommodated or where oscillating or recurrent
tilting or slewing movements must be possible at slow sliding speeds.
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Rotary encoder collars
Stafford Manufacturing Corp., Wilmington, Mass. |
Custom manufactured rotary encoder
collars with targets on the face or outside diameter add speed sensing capability
to rotating shafts. These encoder collars feature steel targets on those
surfaces to provide pickup signals for variable reluctance sensors and can
add speed sensing capability to any rotating shaft. Offered in custom sizes
to fit shafts from a half-inch up to 10 in. O.D., they can be made in one-
or two-piece clamp-type styles and incorporate a range of target patterns.
Suitable for use with all popular sensors, the encoder collars are machined
from aluminum. They can incorporate round, square, or threaded bores, and
can be anodized to match existing equipment. Designed to operate in the
presence of oils and coolants, they also can be supplied with sensor mounting
assemblies to match application requirements.
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Uninter- ruptible power supply
Rockwell Automation, Milwaukee, Wis. |
On the factory floor, a loss of power
can mean a loss of crucial data and production. The Allen-Bradley 1609-P
series of online uninterruptible power supplies offers users increased protection
against the threats of fluctuating power or complete power losses. According
to the manufacturer, these industrial-grade units deliver increased performance
and reliability over standard commercial-grade power supplies by providing
increased voltage and frequency regulation, internal bypass, and input power
factor correction. A comprehensive network management feature allows users
to remotely monitor and configure the devices. The 1609-P series features
an external battery pack that helps simplify battery management by allowing
users to add power quickly when needed, and make a live switch without disrupting
the system. The intelligent battery management system helps users maximize
battery performance, while the frequency and voltage regulation helps ensure
maximum battery life. The new 1609-P high-density, double conversion UPS
is available in power ranges from 3 to 10 KVA, and in 208 and 230 V applications.
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Thermo- couple probes
Omega Engineering Inc., Stamford, Conn. |
Manufacturing operations that involve
extreme heat for long periods, wide fluctuations between high and low temperature,
or corrosive atmospheres require sensors that can take abuse. Super Omegaclad
XL thermocouple probes are designed for such applications. Made with Omega's
exclusive mineral-insulated cable and nickel-chrome sheathing, these corrosion-resistant
probes measure high temperatures with long-term accuracy. In tests conducted
at Omega's calibration lab, Super Omegaclad XL probes outlasted stainless
steel and Inconel probes of equal diameter, yet stayed well within drift
parameters, at a continuous temperature of 1,149°C (2,100°F).
Under severe temperature cycling—between 1,000°C (1,832°F)
and room temperature in 30 seconds or less—Super Omegaclad XL also
beat other probe brands handily, according to the manufacturer. The secret
of this performance in harsh conditions is a process, unique to Omega, that
applies the corrosion-resistant Super Omegaclad XL sheath to thermocouple
cable insulated with magnesium oxide powder. Thanks to the special sheath,
drift is negligible. Prices start at $38.
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Turbine install- lations
Macro Sensors, Pennsauken, N.J. |
The company offers a range of linear variable differential transducers in
various configurations and outputs to satisfy the requirements of both current
and legacy turbine installations. Macro Sensors manufactures exact replacement
power generation LVDTs that match other manufacturers' designs, but
at greater cost savings and availability, according to the manufacturer.
Units are come in a variety of configurations, including hermetically sealed
ac- and dc-operated LVDTs with axial or radial connectors; UL/ULC-listed
ac operated LVDTs approved for operation in Class 1, Division 2 and Class
Zone 2 hazardous locations; and double-shielded and epoxy encapsulated ac-operated
LVDTs that withstand high shock and vibration levels. The LVDTs are implemented
for position measurement on governor valves, throttle valves, reheat/stop
valves, interceptor valves, and many other control valves.
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Liquid flow sensors
McMillan Co., Georgetown, Texas |
The company's 101 and 102 Series
Flo-Sensors provide precise liquid flow measurement at affordable prices.
The flow sensors can be constructed from plastic or brass, and provide a
0-5 V dc analog output proportional to flow rate. Flow rates can be measured
as low as 13 mL/minute. With better than ±3.0 percent linearity (full
scale) and 0.2 percent repeatability (full scale), these flow totalizing
systems provide accurate measurement of liquid flow, useful for critical
flow measurement applications, according to the manufacturer. Compact packaging
allows for integration into new or existing equipment.
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Servicing air filters
Universal Air Filter Co., Sauget, Ill. |
The Flextab is helpful when removing
or positioning filters in hard-to-reach spaces. The unique, new Flextab
adhesive pulltab incorporates ingenious features, according to the company.
The Flextab is flexible, literally and figuratively. Handles and tabs can
be part of a one-piece frame design, but it doesn't always allow
for the necessary clearances. The Flextab can fold out of the way readily,
while remaining accessible behind a door, cover, or bezel. In addition,
Universal's new Flextab adhesive pulltabs are configurable for various
lengths and can mount to multiple surfaces and edges. Made of a lightweight,
high-strength, flame-retardant, self-adhesive polymer, the Flextab is nonconductive,
won't snag on anything, or rattle like metal tabs. The Flextab is
flame resistant and UL 94 V0 rated, so it can be installed in any industry
equipment application.
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