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Straight talk on selecting linear actuators
brakes should be specified in ball-screw actuator systems, and how long batteries may last in systems powered by them. To calculate percent efficiency, simply divide mechanical power-out by electrical power-in and multiply by 100%. Want to use this article? Click here for options!. (C) 2011 Penton
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Pulse and Hold Power Management
is. technology makes our products 3 to 10 times. energized for long periods, standard "Pulse. more power efficient than other solenoid. and Hold" will reduce waste energy. control products on the market. significantly. Acro's "Adaptive Pulse and. Hold", as utilized in the Model 900R, provides. Pulse Width
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Motion control on a budget
. Carriageload slides with short strokes can carry several hundred pounds. Cylinder bore and stroke also factor into load capacity. Obviously, a linear slide would be of no use if the cylinder couldn't produce enough thrust to move the load. By the same token, long-stroke slides with undersized
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Bellows smooth valve moves
two 1-in.-diameter, 1.23-in.-long, silicone-oil-filled nickel bellows connected by a central orifice. Though exact details are proprietary, here's basically how it works: With the turbine shut down, the poppet return spring compresses the second bellows about 0.25 in. (full stroke) and forces oil
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Sizing Pneumatics for Performance and Efficiency
sec and PLC scan time is 0.010 sec. Flexible tubing 14 in. long with no angled fittings connects the valve and cylinder, and there are no flow controls or external friction. Cylinder motion is “bang-bang.” That is, velocity increases linearly with constant acceleration and the external structure
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Energy-Efficient Air Conditioning Systems Utilizing Pneumatic Variable Compressors (.pdf)
temperature target, humidity comfort, and. industry and has a long history - practically since the. fogging risk at the windshield. introduction of the air conditioning systems into. automobiles. The main reason is that advanced. compressor control method was not available beyond. the simple
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Getting to know stepper motors
in seconds, the microprocessor-controlled linear actuator can dispense medications over long periods of time at precise rates and volumes. And unlike an intravenous feeder that relies on gravity to dispense liquids, the syringe pump controls flow by using pressure. The two major factors, flow rate
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Letters
the risk of hair or other items being sucked into the hair dryer, my wife has never had an issue with this. Once the thermal switch has been used a few times, it seems to get weaker and weaker. So I take the hair dryer apart and solder the switch shut. This works well as long as I do not leave any